{

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                "value": 107800000,
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            "human": {
                "value": 100000000,
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                {
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                    "label": "H[2]"
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                "label": "phase-liquid",
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                "value": 218,
                "unit": "kJ·mol[-1]"
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                "i": "0",
                "s": ""
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        "heat": {
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                "value": 0.1805,
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        "image": {
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            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Hydrogen_discharge_tube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
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                "value": 7.18,
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                {
                    "label": "phase-liquid",
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                "value": 25,
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            "calculated": {
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                "value": 20.271,
                "unit": "K"
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                "value": 6.281,
                "unit": "K"
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                "value": 13.8033,
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                "@": {
                    "value": 7.041,
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                "value": 32.938,
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                "@": {
                    "value": 1.2858,
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        "weblinks": [
            {
                "url": "https://www.webelements.com/hydrogen/",
                "text": "WebElements"
            },
            {
                "url": "http://www.periodicvideos.com/videos/001.htm",
                "text": "The Periodic Table of Videos"
            }
        ],
        "wiki": {
            "en": "Hydrogen",
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                "value": 0.0072,
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                "unit": "kJ·mol[-1]"
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                "value": 0,
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            "nfpa": {
                "h": "3",
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                "i": "0",
                "s": ""
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        },
        "heat": {
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                "value": 5193,
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            "thermal_conductivity": {
                "value": 0.1513,
                "unit": "W·m[-1]·K[-1]"
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        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/8/82/Helium_discharge_tube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Helium_discharge_tube.jpg\">Alchemist-hp (Diskussion) (www.pse-mendelejew.de)</a>, <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>, via Wikimedia Commons"
        },
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            "en": "Helium",
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            "la": "Helium"
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            "vdw": {
                "value": 140,
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            "calculated": {
                "value": 31,
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            "condition": [
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                "value": 3.272,
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                "value": 2.177,
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                "@": {
                    "value": 5.043,
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                "value": 4.9,
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                "s": "W"
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                "value": 85,
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            "work_function": {
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        "names": {
            "en": "Lithium",
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            "la": "Lithium"
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                "value": 167,
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                "unit": "pm"
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            "vdw": {
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        "set": "alkalimetal",
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            1
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                {
                    "value": 293.15,
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            ]
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        "standard_atomic_weight": {
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        },
        "standard_potential": {
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            "unit": "V"
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        "superconductivity": "special",
        "symbol": "Li",
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                "value": 453.65,
                "unit": "K"
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                "value": 1603,
                "unit": "K"
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            "liquid": {
                "value": 1149.35,
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                    "value": 67,
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                "value": 287,
                "unit": "GPa"
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                "value": 132,
                "unit": "GPa"
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                "value": 130,
                "unit": "GPa"
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            "poisson": 0.032
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                "value": 25000000,
                "unit": "S·m[-1]"
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            "resistivity": {
                "value": 3.8e-8,
                "unit": "Ωm"
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        },
        "electron_config": "He 2s[2]",
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            "vaporisation": {
                "value": 297,
                "unit": "kJ·mol[-1]"
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            "atomisation": {
                "value": 324,
                "unit": "kJ·mol[-1]"
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        },
        "era": "enlightenment",
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                "value": 600,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 1670,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "301",
                "315",
                "317",
                "319",
                "330",
                "335",
                "350i",
                "372"
            ],
            "p": [
                "201",
                "260",
                "280",
                "284",
                "301+310+330",
                "304+340+310"
            ],
            "hazard": [
                "T",
                "X"
            ],
            "ghs": [
                "06",
                "08"
            ],
            "adr": [
                "6.1"
            ],
            "nfpa": {
                "h": "4",
                "f": "3",
                "i": "3",
                "s": ""
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 1825,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 190,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000113,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 4.98,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/0/0c/Be-140g.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Be-140g.jpg\">Alchemist-hp = Alchemist-hp (pse-mendelejew.de)</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\">CC BY-SA 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                9.322699,
                18.21115,
                153.896203,
                217.7185843
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.000009,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "value": 0.00000485,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Beryllium",
            "de": "Beryllium",
            "la": "Beryllium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
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            "sanderson": 1.81,
            "allred": 1.47,
            "mulliken": 1.54,
            "allen": 1.576,
            "ghosh_gupta": {
                "value": 3.706,
                "unit": "eV"
            },
            "boyd": 1.44,
            "nagle": 1.55,
            "pearson": {
                "value": 4.9,
                "unit": "eV"
            }
        },
        "number": 4,
        "oxidation_state": "2",
        "oxide_character": "amphoteric",
        "period": 2,
        "phase": "solid",
        "price": {
            "value": 857,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "mononuclidic",
            "stable",
            "light"
        ],
        "radius": {
            "empirical": {
                "value": 112,
                "unit": "pm"
            },
            "calculated": {
                "value": 112,
                "unit": "pm"
            },
            "covalent": {
                "value": 96,
                "deviation": 3,
                "unit": "pm"
            },
            "vdw": {
                "value": 153,
                "unit": "pm"
            }
        },
        "set": "alkalineearthmetal",
        "shell": [
            2,
            2
        ],
        "sound_speed": {
            "value": 13000,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 9.0121831,
            "deviation": 5e-7
        },
        "standard_potential": {
            "value": -1.97,
            "unit": "V",
            "info": "Be[2+] + 2e[-] → Be"
        },
        "superconductivity": "normal",
        "symbol": "Be",
        "temperature": {
            "melting": {
                "value": 1560,
                "unit": "K"
            },
            "boiling": {
                "value": 2742,
                "unit": "K"
            },
            "liquid": {
                "value": 1182,
                "unit": "K"
            },
            "critical": {
                "value": 5205,
                "*": true,
                "unit": "K"
            },
            "transition": {
                "value": 26,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LD{50}",
                "organism": "rats",
                "application": "intratracheal",
                "value": {
                    "value": 51,
                    "unit": "mg·kg[-1]"
                }
            },
            {
                "type": "LD{50}",
                "organism": "rats",
                "application": "intravenous",
                "value": {
                    "value": 0.496,
                    "unit": "mg·kg[-1]"
                }
            }
        ],
        "wiki": {
            "en": "Beryllium",
            "de": "Beryllium"
        }
    },
    "b": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 1,
                "unit": "ppb"
            },
            "sun": {
                "value": 2,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 1600,
                "unit": "ppb"
            },
            "crust": {
                "value": 8700,
                "unit": "ppb"
            },
            "water": {
                "value": 4440,
                "unit": "ppb"
            },
            "stream": {
                "value": 10,
                "unit": "ppb"
            },
            "human": {
                "value": 700,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "black-brown",
            "de": "schwarz"
        },
        "atomic_mass": {
            "value": 10.811,
            "unit": "u"
        },
        "basicity": "slightly-acidic",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7440-42-8"
                }
            ],
            "eg": [
                {
                    "value": "231-151-2"
                }
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            "echa": [
                {
                    "value": "100.028.319"
                }
            ]
        },
        "column": 27,
        "crystal_structure": "rho",
        "density": {
            "value": 2.35,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Davy, Gay-Lussac",
            "value": 1808
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        "elastic": {
            "bulk": {
                "value": 320,
                "unit": "GPa"
            }
        },
        "electrical": {
            "conductivity": {
                "value": 0.0001,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 10000,
                "unit": "Ωm"
            }
        },
        "electron_config": "He 2s[2] 2p[1]",
        "enthalpy": {
            "fusion": {
                "value": 50,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 507,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 563,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
        "group": 13,
        "hardness": {
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            "vickers": {
                "value": 4900,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
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                "412"
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            "p": [
                "264",
                "270",
                "273",
                "301+312",
                "501"
            ],
            "ghs": [
                "07"
            ],
            "nfpa": {
                "h": "1",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 1260,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 27,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.000006,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 4.45,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/1/19/Boron_R105.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Boron_R105.jpg\">James L Marshall</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\">CC BY-SA 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                8.298019,
                25.15483,
                37.93058,
                259.3715,
                340.22602
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000067,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "value": 0.00000439,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Boron",
            "de": "Bor",
            "la": "Boron"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.04,
            "sanderson": 2.28,
            "allred": 2.01,
            "mulliken": 2.04,
            "allen": 2.051,
            "ghosh_gupta": {
                "value": 4.9686,
                "unit": "eV"
            },
            "boyd": 1.9,
            "nagle": 2.02,
            "pearson": {
                "value": 4.29,
                "unit": "eV"
            }
        },
        "number": 5,
        "oxidation_state": "'''+3''', +2, +1",
        "oxide_character": "acidic",
        "period": 2,
        "phase": "solid",
        "price": {
            "value": 3.68,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "semiconductor"
        ],
        "radius": {
            "empirical": {
                "value": 90,
                "unit": "pm"
            },
            "calculated": {
                "value": 87,
                "unit": "pm"
            },
            "covalent": {
                "value": 84,
                "deviation": 3,
                "unit": "pm"
            },
            "vdw": {
                "value": 192,
                "unit": "pm"
            }
        },
        "set": "metalloid",
        "shell": [
            2,
            3
        ],
        "sound_speed": {
            "value": 16200,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 10.81,
            "deviation": 0.02,
            "range": [
                10.806,
                10.821
            ]
        },
        "superconductivity": "special",
        "symbol": "B",
        "temperature": {
            "melting": {
                "value": 2349,
                "unit": "K"
            },
            "boiling": {
                "value": 4200,
                "unit": "K"
            },
            "liquid": {
                "value": 1851,
                "unit": "K"
            },
            "transition": {
                "value": 11.2,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LD{50}",
                "organism": "rats",
                "application": "oral",
                "value": {
                    "value": 650,
                    "unit": "mg·kg[-1]"
                }
            }
        ],
        "wiki": {
            "en": "Boron",
            "de": "Bor"
        }
    },
    "c": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 5000000,
                "unit": "ppb"
            },
            "sun": {
                "value": 3000000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 15000000,
                "unit": "ppb"
            },
            "crust": {
                "value": 1800000,
                "unit": "ppb"
            },
            "water": {
                "value": 28000,
                "unit": "ppb"
            },
            "stream": {
                "value": 1200,
                "unit": "ppb"
            },
            "human": {
                "value": 230000000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "black, metallic-looking (graphite); clear (diamond)",
            "de": "schwarz (Graphit); farblos (Diamant)"
        },
        "atomic_mass": {
            "value": 12.01112,
            "unit": "u"
        },
        "basicity": "slightly-acidic",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7440-44-0",
                    "label": "C"
                },
                {
                    "value": "7782-42-5",
                    "label": "G"
                },
                {
                    "value": "7782-40-3",
                    "label": "D"
                }
            ],
            "eg": [
                {
                    "value": "231-153-3"
                }
            ],
            "echa": [
                {
                    "value": "100.028.321"
                }
            ]
        },
        "column": 28,
        "crystal_structure": "hex",
        "density": [
            {
                "label": "amorphous",
                "value": 1.95,
                "range": [
                    1.8,
                    2.1
                ],
                "unit": "g·cm[−3]"
            },
            {
                "label": "graphite",
                "value": 2.26,
                "unit": "g·cm[−3]"
            },
            {
                "label": "diamond",
                "value": 3.51,
                "unit": "g·cm[−1]"
            }
        ],
        "elastic": {
            "bulk": {
                "value": 33,
                "unit": "GPa"
            }
        },
        "electrical": {
            "resistivity": {
                "value": 0.00001,
                "unit": "Ωm"
            }
        },
        "electron_config": "He 2s[2] 2p[2]",
        "enthalpy": {
            "fusion": {
                "value": 117,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 715,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 717,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "antiquity",
        "goldschmidt": "atmophile",
        "group": 14,
        "hardness": {
            "mohs": 0.51
        },
        "hazard": null,
        "heat": {
            "heat_capacity": [
                {
                    "label": "graphite",
                    "value": 427,
                    "unit": "J·kg[−1]·K[−1]"
                },
                {
                    "label": "diamond",
                    "value": 709,
                    "unit": "J·kg[−1]·K[−1]"
                }
            ],
            "thermal_conductivity": {
                "value": 140,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000071,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 4.81,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/0/0f/Glassy_carbon_and_a_1cm3_graphite_cube_HP68-79.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Glassy_carbon_and_a_1cm3_graphite_cube_HP68-79.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                11.260288,
                24.383154,
                47.88778,
                64.49352,
                392.090515
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000059,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "value": 0.00000531,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Carbon",
            "de": "Kohlenstoff",
            "la": "Carbo"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.55,
            "sanderson": 2.75,
            "allred": 2.5,
            "mulliken": 2.48,
            "allen": 2.544,
            "ghosh_gupta": {
                "value": 6.2338,
                "unit": "eV"
            },
            "boyd": 2.6,
            "nagle": 2.55,
            "pearson": {
                "value": 6.27,
                "unit": "eV"
            }
        },
        "number": 6,
        "optical": {
            "reflectivity": {
                "value": 27,
                "unit": "%"
            },
            "refractive_index": {
                "label": "diamond",
                "value": 2.417
            }
        },
        "oxidation_state": "-4 … 4",
        "oxide_character": "acidic",
        "period": 2,
        "phase": "solid",
        "price": {
            "value": 0.122,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "vital",
            "stable",
            "semiconductor",
            "antiquity"
        ],
        "radius": {
            "empirical": {
                "value": 70,
                "unit": "pm"
            },
            "calculated": {
                "value": 67,
                "unit": "pm"
            },
            "covalent": {
                "value": 76,
                "unit": "pm"
            },
            "vdw": {
                "value": 170,
                "unit": "pm"
            }
        },
        "set": "nonmetal",
        "shell": [
            2,
            4
        ],
        "sound_speed": {
            "label": "diamond",
            "value": 18350,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 12.011,
            "deviation": 0.002,
            "range": [
                12.0096,
                12.0116
            ]
        },
        "superconductivity": "special",
        "symbol": "C",
        "temperature": {
            "sublimation": {
                "value": 3915,
                "unit": "K"
            },
            "triple": {
                "value": 4600,
                "unit": "K",
                "@": {
                    "value": 10.8,
                    "unit": "MPa"
                }
            },
            "transition": {
                "value": 15,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Carbon",
            "de": "Kohlenstoff"
        }
    },
    "n": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 1000000,
                "unit": "ppb"
            },
            "sun": {
                "value": 1000000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 1400000,
                "unit": "ppb"
            },
            "crust": {
                "value": 20000,
                "unit": "ppb"
            },
            "water": {
                "value": 500,
                "unit": "ppb"
            },
            "stream": {
                "value": 240,
                "unit": "ppb"
            },
            "human": {
                "value": 26000000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "colorless gas, liquid or solid",
            "de": "farbloses Gas"
        },
        "atomic_mass": {
            "value": 14.006714,
            "unit": "u"
        },
        "basicity": "strongly-acidic",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7727-37-9"
                }
            ],
            "eg": [
                {
                    "value": "231-783-9"
                }
            ],
            "echa": [
                {
                    "value": "100.028.895"
                }
            ]
        },
        "column": 29,
        "crystal_structure": "hex",
        "density": {
            "value": 0.00125,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 273.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Scheele",
            "value": 1771
        },
        "electron_config": "He 2s[2] 2p[3]",
        "enthalpy": {
            "fusion": {
                "value": 0.36,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 2.79,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 473,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "atmophile",
        "group": 15,
        "hazard": {
            "h": [
                "280"
            ],
            "p": [
                "403"
            ],
            "ghs": [
                "04"
            ],
            "adr": [
                "2.2"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 1040,
                "unit": "J·kg[−1]·K[−1]",
                "condition": [
                    {
                        "value": 298,
                        "unit": "K"
                    }
                ]
            },
            "thermal_conductivity": {
                "value": 0.02583,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/9/98/Nitrogen_discharge_tube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Nitrogen_discharge_tube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                14.53413,
                29.60125,
                47.4453,
                77.4735,
                97.8901
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "molar_volume": {
            "value": 0.00001354,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Nitrogen",
            "de": "Stickstoff",
            "la": "Nitrogenium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 3.04,
            "sanderson": 3.19,
            "allred": 3.07,
            "mulliken": 2.9,
            "allen": 3.066,
            "ghosh_gupta": {
                "value": 7.4964,
                "unit": "eV"
            },
            "boyd": 3.08,
            "nagle": 3.12,
            "pearson": {
                "value": 7.3,
                "unit": "eV"
            }
        },
        "number": 7,
        "optical": {
            "refractive_index": [
                {
                    "label": "phase-gas",
                    "value": 1.000298
                },
                {
                    "label": "phase-liquid",
                    "value": 1.197
                }
            ]
        },
        "oxidation_state": "-3, -2, -1, 0, 1, 2, '''3''', 4, 5",
        "oxide_character": "acidic",
        "period": 2,
        "phase": "gas",
        "price": {
            "value": 0.14,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "vital",
            "stable"
        ],
        "radius": {
            "empirical": {
                "value": 65,
                "unit": "pm"
            },
            "calculated": {
                "value": 56,
                "unit": "pm"
            },
            "covalent": {
                "value": 71,
                "deviation": 1,
                "unit": "pm"
            },
            "vdw": {
                "value": 155,
                "unit": "pm"
            }
        },
        "set": "nonmetal",
        "shell": [
            2,
            5
        ],
        "sound_speed": {
            "value": 333.6,
            "unit": "m·s[−1]",
            "condition": [
                {
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                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
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            "deviation": 0.001,
            "range": [
                14.00643,
                14.00728
            ]
        },
        "superconductivity": "special",
        "symbol": "N",
        "temperature": {
            "melting": {
                "value": 63.23,
                "unit": "K"
            },
            "boiling": {
                "value": 77.355,
                "unit": "K"
            },
            "liquid": {
                "value": 14.125,
                "unit": "K"
            },
            "triple": {
                "value": 63.151,
                "unit": "K",
                "@": {
                    "value": 12.52,
                    "unit": "kPa"
                }
            },
            "critical": {
                "value": 126.21,
                "unit": "K",
                "@": {
                    "value": 3.39,
                    "unit": "MPa"
                }
            }
        },
        "wiki": {
            "en": "Nitrogen",
            "de": "Stickstoff"
        }
    },
    "o": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 10000000,
                "unit": "ppb"
            },
            "sun": {
                "value": 9000000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 410000000,
                "unit": "ppb"
            },
            "crust": {
                "value": 460000000,
                "unit": "ppb"
            },
            "water": {
                "value": 857000000,
                "unit": "ppb"
            },
            "stream": {
                "value": 880000000,
                "unit": "ppb"
            },
            "human": {
                "value": 610000000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "colorless (gas); pale blue (liquid and solid)",
            "de": "farbloses Gas"
        },
        "atomic_mass": {
            "value": 15.99915,
            "unit": "u"
        },
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7782-44-7",
                    "label": "O{2}"
                }
            ],
            "eg": [
                {
                    "value": "231-956-9"
                }
            ],
            "echa": [
                {
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                }
            ],
            "atc": [
                {
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            ]
        },
        "column": 30,
        "crystal_structure": "sc",
        "density": {
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            "unit": "g·cm[−3]",
            "condition": [
                {
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                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Priestley, Scheele",
            "value": 1774
        },
        "electron_config": "He 2s[2] 2p[4]",
        "enthalpy": {
            "fusion": {
                "value": 0.222,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 3.41,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 249,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "lithophile",
        "group": 16,
        "hazard": {
            "h": [
                "270",
                "280"
            ],
            "p": [
                "244",
                "220",
                "370+376",
                "403"
            ],
            "hazard": [
                "O"
            ],
            "ghs": [
                "03",
                "04"
            ],
            "adr": [
                "2.2",
                "5.1"
            ],
            "nfpa": {
                "h": "0",
                "f": "0",
                "i": "1",
                "s": "OX"
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 920,
                "unit": "J·kg[−1]·K[−1]",
                "condition": [
                    {
                        "value": 298,
                        "unit": "K"
                    }
                ]
            },
            "thermal_conductivity": {
                "value": 0.02658,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/4/45/Oxygen_discharge_tube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Oxygen_discharge_tube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                13.618055,
                35.12112,
                54.93554,
                77.4135,
                113.899,
                138.1189
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.00345,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 293,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00001736,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Oxygen",
            "de": "Sauerstoff",
            "la": "Oxygenium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 3.44,
            "sanderson": 3.65,
            "allred": 3.5,
            "mulliken": 3.41,
            "allen": 3.61,
            "ghosh_gupta": {
                "value": 8.7861,
                "unit": "eV"
            },
            "boyd": 3.62,
            "nagle": 3.62,
            "pearson": {
                "value": 7.54,
                "unit": "eV"
            }
        },
        "number": 8,
        "optical": {
            "refractive_index": [
                {
                    "label": "phase-gas",
                    "value": 1.000271
                },
                {
                    "label": "phase-liquid",
                    "value": 1.221
                }
            ]
        },
        "oxidation_state": "'''-2''', -1, 0, +1, +2",
        "oxide_character": "acidic",
        "period": 2,
        "phase": "gas",
        "price": {
            "value": 0.154,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "vital",
            "stable"
        ],
        "radius": {
            "empirical": {
                "value": 60,
                "unit": "pm"
            },
            "calculated": {
                "value": 48,
                "unit": "pm"
            },
            "covalent": {
                "value": 66,
                "deviation": 2,
                "unit": "pm"
            },
            "vdw": {
                "value": 152,
                "unit": "pm"
            }
        },
        "set": "nonmetal",
        "shell": [
            2,
            6
        ],
        "sound_speed": {
            "value": 317.5,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 15.999,
            "deviation": 0.001,
            "range": [
                15.99903,
                15.99977
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        },
        "standard_potential": {
            "value": 1.23,
            "unit": "V"
        },
        "superconductivity": "normal",
        "symbol": "O",
        "temperature": {
            "melting": {
                "value": 54.36,
                "unit": "K"
            },
            "boiling": {
                "value": 90.188,
                "unit": "K"
            },
            "liquid": {
                "value": 35.828,
                "unit": "K"
            },
            "triple": {
                "value": 54.361,
                "unit": "K",
                "@": {
                    "value": 0.1463,
                    "unit": "kPa"
                }
            },
            "critical": {
                "value": 154.581,
                "unit": "K",
                "@": {
                    "value": 5.043,
                    "unit": "MPa"
                }
            },
            "transition": {
                "value": 0.6,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Oxygen",
            "de": "Sauerstoff"
        }
    },
    "f": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 400,
                "unit": "ppb"
            },
            "sun": {
                "value": 500,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 89000,
                "unit": "ppb"
            },
            "crust": {
                "value": 540000,
                "unit": "ppb"
            },
            "water": {
                "value": 1300,
                "unit": "ppb"
            },
            "stream": {
                "value": 100,
                "unit": "ppb"
            },
            "human": {
                "value": 37000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "very pale yellow (gas); bright yellow (liquid); alpha is opaque, beta is transparent (solid)",
            "de": "blasses, gelbliches Gas"
        },
        "atomic_mass": {
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            "unit": "u"
        },
        "basicity": "strongly-acidic",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7782-41-4"
                }
            ],
            "eg": [
                {
                    "value": "231-954-8"
                }
            ],
            "echa": [
                {
                    "value": "100.029.049"
                }
            ]
        },
        "column": 31,
        "crystal_structure": "sc",
        "density": {
            "value": 0.0016965,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 273,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Moissan",
            "value": 1886
        },
        "electron_config": "He 2s[2] 2p[5]",
        "enthalpy": {
            "fusion": {
                "value": 0.26,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 3.27,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 79,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "lithophile",
        "group": 17,
        "hazard": {
            "h": [
                "270",
                "280",
                "330",
                "314"
            ],
            "p": [
                "260",
                "280",
                "244",
                "220",
                "304+340",
                "303+361+353",
                "305+351+338",
                "315",
                "370+376",
                "405",
                "403"
            ],
            "hazard": [
                "O",
                "T",
                "X"
            ],
            "ghs": [
                "03",
                "04",
                "05",
                "06"
            ],
            "adr": [
                "2.2",
                "5.1",
                "6.1",
                "8"
            ],
            "nfpa": {
                "h": "4",
                "f": "0",
                "i": "3",
                "s": "W|OX"
            }
        },
        "heat": {
            "thermal_conductivity": {
                "value": 0.0279,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/2/2c/Fluoro_liquido_a_-196%C2%B0C_1.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Fluoro_liquido_a_-196%C2%B0C_1.jpg\">Fulvio314</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\">CC BY-SA 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                17.42282,
                34.97081,
                62.70798,
                87.175,
                114.249,
                157.16311,
                185.1868
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.00012,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "label": "phase-solid",
            "value": 0.0000112,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Fluorine",
            "de": "Fluor",
            "la": "Fluor"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 3.98,
            "sanderson": 4,
            "allred": 4.1,
            "mulliken": 3.91,
            "allen": 4.193,
            "ghosh_gupta": {
                "value": 10.0378,
                "unit": "eV"
            },
            "boyd": 4,
            "nagle": 4.23,
            "pearson": {
                "value": 10.41,
                "unit": "eV"
            }
        },
        "number": 9,
        "optical": {
            "refractive_index": 1.000195
        },
        "oxidation_state": "-1",
        "oxide_character": "acidic",
        "period": 2,
        "phase": "gas",
        "price": {
            "value": 2,
            "deviation": 0.16,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "vital",
            "mononuclidic",
            "stable"
        ],
        "radius": {
            "empirical": {
                "value": 50,
                "unit": "pm"
            },
            "calculated": {
                "value": 42,
                "unit": "pm"
            },
            "covalent": {
                "value": 64,
                "unit": "pm"
            },
            "vdw": {
                "value": 135,
                "unit": "pm"
            }
        },
        "set": "halogen",
        "shell": [
            2,
            7
        ],
        "standard_atomic_weight": {
            "value": 18.99840316,
            "deviation": 5e-9
        },
        "standard_potential": {
            "value": 2.87,
            "unit": "V",
            "info": "F + e[-] → F[-]"
        },
        "superconductivity": "none",
        "symbol": "F",
        "temperature": {
            "melting": {
                "value": 53.48,
                "unit": "K"
            },
            "boiling": {
                "value": 85.03,
                "unit": "K"
            },
            "liquid": {
                "value": 31.55,
                "unit": "K"
            },
            "triple": {
                "value": 53.48,
                "unit": "K",
                "@": {
                    "value": 0.252,
                    "unit": "kPa"
                }
            },
            "critical": {
                "value": 144.41,
                "unit": "K",
                "@": {
                    "value": 5.1724,
                    "unit": "MPa"
                }
            }
        },
        "wiki": {
            "en": "Fluorine",
            "de": "Fluor"
        }
    },
    "ne": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 1300000,
                "unit": "ppb"
            },
            "sun": {
                "value": 1000000,
                "unit": "ppb"
            },
            "crust": {
                "value": 3,
                "unit": "ppb"
            },
            "water": {
                "value": 0.12,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "colorless gas exhibiting an orange-red glow when placed in an electric field",
            "de": "farbloses Gas"
        },
        "atomic_mass": {
            "value": 20.17976,
            "unit": "u"
        },
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7440-01-9"
                }
            ],
            "eg": [
                {
                    "value": "231-110-9"
                }
            ],
            "echa": [
                {
                    "value": "100.028.282"
                }
            ]
        },
        "column": 32,
        "crystal_structure": "fcc",
        "density": {
            "value": 0.0009,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 273,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Ramsay, Travers",
            "value": 1898
        },
        "electron_config": "He 2s[2] 2p[6]",
        "enthalpy": {
            "fusion": {
                "value": 0.34,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 1.75,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 0,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "atmophile",
        "group": 18,
        "hazard": {
            "h": [
                "280"
            ],
            "p": [
                "403"
            ],
            "ghs": [
                "04"
            ],
            "adr": [
                "2.2"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 1030.4,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 0.0491,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/4/46/Neon_discharge_tube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Neon_discharge_tube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                21.56454,
                40.96297,
                63.4233,
                97.19,
                126.247
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.00000674,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "label": "phase-solid",
            "value": 0.00001323,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Neon",
            "de": "Neon",
            "la": "Neon"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "sanderson": 4.5,
            "allred": 4.84,
            "mulliken": 3.98,
            "allen": 4.787,
            "ghosh_gupta": {
                "value": 11.3003,
                "unit": "eV"
            },
            "nagle": 4.89
        },
        "number": 10,
        "optical": {
            "refractive_index": 1.000067
        },
        "period": 2,
        "phase": "gas",
        "price": {
            "value": 240,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable"
        ],
        "radius": {
            "calculated": {
                "value": 38,
                "unit": "pm"
            },
            "covalent": {
                "value": 58,
                "unit": "pm"
            },
            "vdw": {
                "value": 154,
                "unit": "pm"
            }
        },
        "set": "noblegas",
        "shell": [
            2,
            8
        ],
        "sound_speed": {
            "value": 435,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 20.1797,
            "deviation": 0.0006
        },
        "superconductivity": "none",
        "symbol": "Ne",
        "temperature": {
            "melting": {
                "value": 24.56,
                "unit": "K"
            },
            "boiling": {
                "value": 27.104,
                "unit": "K"
            },
            "liquid": {
                "value": 2.544,
                "unit": "K"
            },
            "triple": {
                "value": 24.556,
                "unit": "K",
                "@": {
                    "value": 43.37,
                    "unit": "kPa"
                }
            },
            "critical": {
                "value": 44.4918,
                "unit": "K",
                "@": {
                    "value": 2.7686,
                    "unit": "MPa"
                }
            }
        },
        "wiki": {
            "en": "Neon",
            "de": "Neon"
        }
    },
    "na": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 20000,
                "unit": "ppb"
            },
            "sun": {
                "value": 40000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 5600000,
                "unit": "ppb"
            },
            "crust": {
                "value": 23000000,
                "unit": "ppb"
            },
            "water": {
                "value": 11050000,
                "unit": "ppb"
            },
            "stream": {
                "value": 8000,
                "unit": "ppb"
            },
            "human": {
                "value": 1400000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white metallic",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
            "value": 22.989769282,
            "unit": "u"
        },
        "basicity": "strongly-alkaline",
        "block": "s",
        "classification": {
            "cas": [
                {
                    "value": "7440-23-5"
                }
            ],
            "eg": [
                {
                    "value": "231-132-9"
                }
            ],
            "echa": [
                {
                    "value": "100.028.302"
                }
            ]
        },
        "column": 1,
        "crystal_structure": "bcc",
        "density": {
            "value": 0.968,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Davy",
            "value": 1807
        },
        "elastic": {
            "young": {
                "value": 10,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 3.3,
                "unit": "GPa"
            },
            "bulk": {
                "value": 6.3,
                "unit": "GPa"
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                "value": 21000000,
                "unit": "S·m[-1]"
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            "resistivity": {
                "value": 4.9e-8,
                "unit": "Ωm"
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        },
        "electron_config": "Ne 3s[1]",
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                "unit": "kJ·mol[-1]"
            },
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                "unit": "kJ·mol[-1]"
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            "atomisation": {
                "value": 107,
                "unit": "kJ·mol[-1]"
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                "unit": "NM·m[-2]"
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        },
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                "314"
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                "231+232",
                "260",
                "280",
                "303+361+353",
                "305+351+338"
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                "F",
                "C"
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                "02",
                "05"
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                "4.3"
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            "nfpa": {
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                "i": "2",
                "s": "W"
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        },
        "heat": {
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                "value": 1230,
                "unit": "J·kg[−1]·K[−1]"
            },
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                "value": 140,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.000071,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 2.75,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/2/27/Na_%28Sodium%29.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Na_(Sodium).jpg\">The original uploader was Dnn87 at English Wikipedia.</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\">CC BY-SA 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
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                98.936,
                138.404
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        },
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                    "unit": "K"
                }
            ]
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                "unit": "eV"
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            }
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            "deviation": 0.43,
            "unit": "USD"
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                "value": 180,
                "unit": "pm"
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            "calculated": {
                "value": 190,
                "unit": "pm"
            },
            "covalent": {
                "value": 166,
                "deviation": 9,
                "unit": "pm"
            },
            "vdw": {
                "value": 227,
                "unit": "pm"
            }
        },
        "set": "alkalimetal",
        "shell": [
            2,
            8,
            1
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            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
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        "standard_potential": {
            "value": -2.713,
            "unit": "V",
            "info": "Na[+] + e[-] → Na"
        },
        "superconductivity": "none",
        "symbol": "Na",
        "temperature": {
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                "value": 370.944,
                "unit": "K"
            },
            "boiling": {
                "value": 1156.09,
                "unit": "K"
            },
            "liquid": {
                "value": 785.146,
                "unit": "K"
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            "critical": {
                "value": 2573,
                "*": true,
                "unit": "K",
                "@": {
                    "value": 35,
                    "unit": "MPa"
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        "wiki": {
            "en": "Sodium",
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                "value": 600000,
                "unit": "ppb"
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                "unit": "ppb"
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            "meteorite": {
                "value": 120000000,
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                "value": 29000000,
                "unit": "ppb"
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                "value": 1326000,
                "unit": "ppb"
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            "stream": {
                "value": 4100,
                "unit": "ppb"
            },
            "human": {
                "value": 270000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "shiny grey solid",
            "de": "silbrig weiß"
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        "atomic_mass": {
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                    "value": "7439-95-4"
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                {
                    "value": "231-104-6"
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            "echa": [
                {
                    "value": "100.028.276"
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                {
                    "value": "A12CC"
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                {
                    "value": 293.15,
                    "unit": "K"
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        "discovery": {
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        },
        "elastic": {
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                "value": 45,
                "unit": "GPa"
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                "unit": "GPa"
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            "bulk": {
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                "unit": "GPa"
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            "poisson": 0.29
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        "electrical": {
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                "value": 22700000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 4.4e-8,
                "unit": "Ωm"
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        },
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                "value": 8.7,
                "unit": "kJ·mol[-1]"
            },
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                "value": 128,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 146,
                "unit": "kJ·mol[-1]"
            }
        },
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                "value": 260,
                "unit": "NM·m[-2]"
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                "280"
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                "F"
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            "adr": [
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            "nfpa": {
                "h": "0",
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                "i": "1",
                "s": ""
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        },
        "heat": {
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                "value": 1023,
                "unit": "J·kg[−1]·K[−1]"
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            "thermal_conductivity": {
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                "unit": "W·m[-1]·K[-1]"
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            "thermal_expansion": {
                "value": 0.0000082,
                "unit": "K[-1]"
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            "work_function": {
                "value": 3.66,
                "unit": "eV"
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        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/5/5c/CSIRO_ScienceImage_2893_Crystalised_magnesium.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:CSIRO_ScienceImage_2893_Crystalised_magnesium.jpg\">CSIRO</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
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                15.035271,
                80.1436,
                109.2654,
                141.33
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        },
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                {
                    "value": 298,
                    "unit": "K"
                }
            ]
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        "molar_volume": {
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        },
        "names": {
            "en": "Magnesium",
            "de": "Magnesium",
            "la": "Magnesium"
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        "natural_occurrence": "primordial",
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                "unit": "eV"
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            "boyd": 1.32,
            "nagle": 1.32,
            "pearson": {
                "value": 3.75,
                "unit": "eV"
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        },
        "number": 12,
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                "value": 74,
                "unit": "%"
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        },
        "oxidation_state": "1, '''2'''",
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                "value": 150,
                "unit": "pm"
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                "value": 145,
                "unit": "pm"
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            "covalent": {
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                "unit": "pm"
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            "vdw": {
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                "unit": "pm"
            }
        },
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            8,
            2
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            "unit": "V",
            "info": "Mg[2+] + 2e[-] → Mg"
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        "superconductivity": "none",
        "symbol": "Mg",
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                "value": 923,
                "unit": "K"
            },
            "boiling": {
                "value": 1363,
                "unit": "K"
            },
            "liquid": {
                "value": 440,
                "unit": "K"
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        },
        "wiki": {
            "en": "Magnesium",
            "de": "Magnesium"
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    },
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                "value": 50000,
                "unit": "ppb"
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                "value": 9300000,
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                "unit": "ppb"
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                "unit": "ppb"
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                "value": 900,
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                    "value": "7429-90-5"
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                {
                    "value": "231-072-3"
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                    "value": "100.028.248"
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                "unit": "GPa"
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                "value": 26,
                "unit": "GPa"
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            "poisson": 0.35
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                "value": 37700000,
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            },
            "resistivity": {
                "value": 2.7e-8,
                "unit": "Ωm"
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        },
        "electron_config": "Ne 3s[2] 3p[1]",
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            },
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                "value": 293,
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            },
            "atomisation": {
                "value": 326,
                "unit": "kJ·mol[-1]"
            }
        },
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        },
        "heat": {
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                "unit": "W·m[-1]·K[-1]"
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            "work_function": {
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                "unit": "eV"
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        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/5/5d/Aluminium-4.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Aluminium-4.jpg\">http://images-of-elements.com/aluminium.php</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
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        "ionization": {
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                18.82855,
                28.447642,
                119.9924,
                153.8252
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        },
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            "unit": "cm[3]·mol[−1]"
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        },
        "names": {
            "en": "Aluminum",
            "de": "Aluminium",
            "la": "Aluminium"
        },
        "natural_occurrence": "primordial",
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                "value": 4.6393,
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            "boyd": 1.58,
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            "pearson": {
                "value": 3.23,
                "unit": "eV"
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        },
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        },
        "oxidation_state": "1, 2, '''3'''",
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            "light"
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        "radius": {
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                "value": 143,
                "unit": "pm"
            },
            "calculated": {
                "value": 118,
                "unit": "pm"
            },
            "covalent": {
                "value": 121,
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                "unit": "pm"
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                "unit": "pm"
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        },
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            8,
            3
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            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
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        },
        "standard_potential": {
            "value": -1.676,
            "unit": "V",
            "info": "Al[3+] + 3e[-] → Al"
        },
        "superconductivity": "normal",
        "symbol": "Al",
        "temperature": {
            "melting": {
                "value": 933.47,
                "unit": "K"
            },
            "boiling": {
                "value": 2743,
                "unit": "K"
            },
            "liquid": {
                "value": 1809.53,
                "unit": "K"
            },
            "transition": {
                "value": 1.18,
                "unit": "K"
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        },
        "wiki": {
            "en": "Aluminum",
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    },
    "si": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "unit": "ppb"
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                "value": 1000,
                "unit": "ppb"
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                "value": 5000,
                "unit": "ppb"
            },
            "human": {
                "value": 260000,
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            }
        },
        "appearance": {
            "en": "crystalline, reflective with bluish-tinged faces",
            "de": "dunkelgrau, bläulicher Farbton"
        },
        "atomic_mass": {
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                    "value": "100.028.300"
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                {
                    "value": 293.15,
                    "unit": "K"
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            ]
        },
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        "elastic": {
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                "value": 47,
                "unit": "GPa"
            },
            "bulk": {
                "value": 100,
                "unit": "GPa"
            }
        },
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                "value": 0.0005,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 0.001,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ne 3s[2] 3p[2]",
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                "value": 50.2,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 359,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 456,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
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        },
        "hazard": null,
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                "value": 703,
                "unit": "J·kg[−1]·K[−1]",
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                        "unit": "K"
                    }
                ]
            },
            "thermal_conductivity": {
                "value": 150,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000026,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/e/e9/SiliconCroda.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:SiliconCroda.jpg\">Enricoros at English Wikipedia</a>, Public domain, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                8.15168,
                16.34585,
                33.493,
                45.14179,
                166.767
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000039,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00001206,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Silicon",
            "de": "Silicium",
            "la": "Silicium"
        },
        "natural_occurrence": "primordial",
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            "allred": 1.74,
            "mulliken": 2.28,
            "allen": 1.916,
            "ghosh_gupta": {
                "value": 5.5236,
                "unit": "eV"
            },
            "boyd": 1.87,
            "nagle": 1.87,
            "pearson": {
                "value": 4.77,
                "unit": "eV"
            }
        },
        "number": 14,
        "optical": {
            "reflectivity": {
                "value": 28,
                "unit": "%"
            }
        },
        "oxidation_state": "-4, (2), '''+4'''",
        "oxide_character": "acidic",
        "period": 3,
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            "unit": "USD"
        },
        "properties": [
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            "native",
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            "semiconductor"
        ],
        "radius": {
            "empirical": {
                "value": 111,
                "unit": "pm"
            },
            "calculated": {
                "value": 111,
                "unit": "pm"
            },
            "covalent": {
                "value": 111,
                "unit": "pm"
            },
            "vdw": {
                "value": 210,
                "unit": "pm"
            }
        },
        "set": "metalloid",
        "shell": [
            2,
            8,
            4
        ],
        "sound_speed": {
            "value": 8433,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 28.085,
            "deviation": 0.001,
            "range": [
                28.084,
                28.086
            ]
        },
        "superconductivity": "special",
        "symbol": "Si",
        "temperature": {
            "melting": {
                "value": 1687,
                "unit": "K"
            },
            "boiling": {
                "value": 3538,
                "unit": "K"
            },
            "liquid": {
                "value": 1851,
                "unit": "K"
            },
            "transition": {
                "value": 8.5,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Silicon",
            "de": "Silicium"
        }
    },
    "p": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 7000,
                "unit": "ppb"
            },
            "sun": {
                "value": 7000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 1100000,
                "unit": "ppb"
            },
            "crust": {
                "value": 1000000,
                "unit": "ppb"
            },
            "water": {
                "value": 70,
                "unit": "ppb"
            },
            "stream": {
                "value": 20,
                "unit": "ppb"
            },
            "human": {
                "value": 11000000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "white, red and violet are waxy, black is metallic-looking",
            "de": "weiß-beige (W); dunkelrot (R); schwarz (S)"
        },
        "atomic_mass": {
            "value": 30.9737619985,
            "unit": "u"
        },
        "basicity": "slightly-acidic",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7723-14-0",
                    "label": "red"
                },
                {
                    "value": "12185-10-3",
                    "label": "white"
                }
            ],
            "eg": [
                {
                    "value": "231-115-6"
                }
            ],
            "echa": [
                {
                    "value": "100.028.286"
                }
            ]
        },
        "column": 29,
        "crystal_structure": "orth",
        "density": [
            {
                "label": "white",
                "value": 1.83,
                "unit": "g·cm[−3]"
            },
            {
                "label": "red",
                "value": 2.2,
                "range": [
                    2,
                    2.4
                ],
                "unit": "g·cm[−1]"
            },
            {
                "label": "black",
                "value": 2.69,
                "unit": "g·cm[−1]"
            }
        ],
        "discovery": {
            "by": "Brand",
            "value": 1669
        },
        "elastic": {
            "bulk": {
                "value": 11,
                "unit": "GPa"
            }
        },
        "electrical": {
            "resistivity": {
                "value": 1e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ne 3s[2] 3p[3]",
        "enthalpy": {
            "fusion": {
                "value": 0.64,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 12.4,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 315,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "lithophile",
        "group": 15,
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            "h": [
                "250",
                "300+330",
                "314",
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            "p": [
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                "273",
                "280",
                "301+310+330",
                "303+361+353",
                "304+340+310",
                "305+351+338+310"
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            "hazard": [
                "F",
                "C",
                "T",
                "N"
            ],
            "ghs": [
                "02",
                "05",
                "06",
                "09"
            ],
            "adr": [
                "4.2",
                "6.1",
                "9"
            ],
            "nfpa": {
                "h": "4",
                "f": "4",
                "i": "2",
                "s": ""
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 685.6,
                "unit": "J·kg[−1]·K[−1]",
                "condition": [
                    {
                        "value": 298,
                        "unit": "K"
                    }
                ]
            },
            "thermal_conductivity": {
                "value": 0.236,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/b/be/%C4%8Cerven%C3%BD_fosfor.png",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:%C4%8Cerven%C3%BD_fosfor.png\">Ondřej Mangl</a>, Public domain, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                10.486686,
                19.76949,
                30.20264,
                51.44387,
                65.02511
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            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000208,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 293,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00001702,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Phosphorus",
            "de": "Phosphor",
            "la": "Phosphor"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.19,
            "sanderson": 2.52,
            "allred": 2.06,
            "mulliken": 2.3,
            "allen": 2.253,
            "ghosh_gupta": {
                "value": 6.3405,
                "unit": "eV"
            },
            "boyd": 2.17,
            "nagle": 2.22,
            "pearson": {
                "value": 5.62,
                "unit": "eV"
            }
        },
        "number": 15,
        "optical": {
            "refractive_index": 1.001212
        },
        "oxidation_state": "±3, 4, '''5'''",
        "oxide_character": "acidic",
        "period": 3,
        "phase": "solid",
        "price": {
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            "unit": "USD"
        },
        "properties": [
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            "stable"
        ],
        "radius": {
            "empirical": {
                "value": 100,
                "unit": "pm"
            },
            "calculated": {
                "value": 98,
                "unit": "pm"
            },
            "covalent": {
                "value": 107,
                "deviation": 3,
                "unit": "pm"
            },
            "vdw": {
                "value": 180,
                "unit": "pm"
            }
        },
        "set": "nonmetal",
        "shell": [
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            8,
            5
        ],
        "standard_atomic_weight": {
            "value": 30.973762,
            "deviation": 5e-9
        },
        "superconductivity": "special",
        "symbol": "P",
        "temperature": {
            "melting": {
                "value": 317.3,
                "unit": "K"
            },
            "boiling": {
                "value": 553.7,
                "unit": "K"
            },
            "liquid": {
                "value": 236.4,
                "unit": "K"
            },
            "sublimation": {
                "value": 689.2,
                "unit": "K",
                "range": [
                    689.2,
                    863
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            },
            "transition": {
                "value": 18,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LD{50}",
                "organism": "rats",
                "application": "oral",
                "value": {
                    "value": 3.03,
                    "unit": "mg·kg[-1]"
                }
            },
            {
                "type": "LD{50}",
                "organism": "mouse",
                "application": "oral",
                "value": {
                    "value": 4.82,
                    "unit": "mg·kg[-1]"
                }
            },
            {
                "type": "LD{Lo}",
                "organism": "human",
                "application": "oral",
                "value": {
                    "value": null,
                    "range": [
                        1.4,
                        22
                    ],
                    "unit": "mg·kg[-1]"
                }
            }
        ],
        "wiki": {
            "en": "Phosphorus",
            "de": "Phosphor"
        }
    },
    "s": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 500000,
                "unit": "ppb"
            },
            "sun": {
                "value": 400000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 41000000,
                "unit": "ppb"
            },
            "crust": {
                "value": 420000,
                "unit": "ppb"
            },
            "water": {
                "value": 928000,
                "unit": "ppb"
            },
            "stream": {
                "value": 4000,
                "unit": "ppb"
            },
            "human": {
                "value": 2000000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "yellow sintered microcrystals",
            "de": "gelb"
        },
        "atomic_mass": {
            "value": 32.0632,
            "unit": "u"
        },
        "basicity": "strongly-acidic",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7704-34-9"
                }
            ],
            "eg": [
                {
                    "value": "231-722-6"
                }
            ],
            "echa": [
                {
                    "value": "100.028.839"
                }
            ],
            "atc": [
                {
                    "value": "D10AB02"
                }
            ]
        },
        "column": 30,
        "crystal_structure": "orth",
        "density": {
            "value": 2.07,
            "unit": "g·cm[−3]"
        },
        "elastic": {
            "bulk": {
                "value": 7.7,
                "unit": "GPa"
            }
        },
        "electrical": {
            "resistivity": {
                "value": 10000000000000000,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ne 3s[2] 3p[4]",
        "enthalpy": {
            "fusion": {
                "value": 1.73,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 9.8,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 279,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "antiquity",
        "goldschmidt": "chalcophile",
        "group": 16,
        "hardness": {
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        },
        "hazard": {
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                "315"
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            "p": null,
            "ghs": [
                "07"
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            "adr": [
                "4.1"
            ],
            "nfpa": {
                "h": "2",
                "f": "1",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 736,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 0.205,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/8/88/Sulfur_-_El_Desierto_mine%2C_San_Pablo_de_Napa%2C_Daniel_Campos_Province%2C_Potos%C3%AD%2C_Bolivia.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Sulfur_-_El_Desierto_mine,_San_Pablo_de_Napa,_Daniel_Campos_Province,_Potos%C3%AD,_Bolivia.jpg\">Ivar Leidus</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\">CC BY-SA 4.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                10.36001,
                23.33788,
                34.86,
                47.222,
                72.5945,
                88.0529
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000155,
            "unit": "cm[3]·mol[−1]",
            "condition": [
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                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00001553,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Sulfur",
            "de": "Schwefel",
            "la": "Sulfur"
        },
        "natural_occurrence": "primordial",
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            "sanderson": 2.96,
            "allred": 2.44,
            "mulliken": 2.69,
            "allen": 2.589,
            "ghosh_gupta": {
                "value": 6.8379,
                "unit": "eV"
            },
            "boyd": 2.64,
            "nagle": 2.49,
            "pearson": {
                "value": 6.22,
                "unit": "eV"
            }
        },
        "number": 16,
        "optical": {
            "refractive_index": 1.001111
        },
        "oxidation_state": "±2 … +6",
        "oxide_character": "acidic",
        "period": 3,
        "phase": "solid",
        "price": {
            "value": 0.0926,
            "unit": "USD"
        },
        "properties": [
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            "vital",
            "stable",
            "antiquity"
        ],
        "radius": {
            "empirical": {
                "value": 100,
                "unit": "pm"
            },
            "calculated": {
                "value": 88,
                "unit": "pm"
            },
            "covalent": {
                "value": 105,
                "deviation": 3,
                "unit": "pm"
            },
            "vdw": {
                "value": 180,
                "unit": "pm"
            }
        },
        "set": "nonmetal",
        "shell": [
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            8,
            6
        ],
        "standard_atomic_weight": {
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            "range": [
                32.059,
                32.076
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        },
        "standard_potential": {
            "value": -0.48,
            "unit": "V",
            "info": "S + 2e[-] → S[2-]"
        },
        "superconductivity": "special",
        "symbol": "S",
        "temperature": {
            "melting": {
                "value": 388.36,
                "unit": "K"
            },
            "boiling": {
                "value": 717.8,
                "unit": "K"
            },
            "liquid": {
                "value": 329.44,
                "unit": "K"
            },
            "critical": {
                "value": 1314,
                "unit": "K",
                "@": {
                    "value": 20.7,
                    "unit": "MPa"
                }
            },
            "transition": {
                "value": 17,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Sulfur",
            "de": "Schwefel"
        }
    },
    "cl": {
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        "abundance": {
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                "value": 1000,
                "unit": "ppb"
            },
            "sun": {
                "value": 8000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 380000,
                "unit": "ppb"
            },
            "crust": {
                "value": 170000,
                "unit": "ppb"
            },
            "water": {
                "value": 19870000,
                "unit": "ppb"
            },
            "stream": {
                "value": 8000,
                "unit": "ppb"
            },
            "human": {
                "value": 1200000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "pale yellow-green gas",
            "de": "gelblich-grün"
        },
        "atomic_mass": {
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            "unit": "u"
        },
        "basicity": "strongly-acidic",
        "block": "p",
        "classification": {
            "cas": [
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                    "value": "7782-50-5"
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            ],
            "eg": [
                {
                    "value": "231-959-5"
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            ],
            "echa": [
                {
                    "value": "100.029.053"
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            ]
        },
        "column": 31,
        "crystal_structure": "orth",
        "density": {
            "value": 3.215,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 273,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Scheele",
            "value": 1774
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        "elastic": {
            "bulk": {
                "value": 1.1,
                "unit": "GPa"
            }
        },
        "electrical": {
            "resistivity": {
                "value": 1000,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ne 3s[2] 3p[5]",
        "enthalpy": {
            "fusion": {
                "value": 3.2,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 10.2,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 122,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "lithophile",
        "group": 17,
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                "330",
                "315",
                "319",
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            "hazard": [
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                "T",
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            "adr": [
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            "nfpa": {
                "h": "3",
                "f": "0",
                "i": "0",
                "s": "OX"
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        },
        "heat": {
            "heat_capacity": {
                "value": 480,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 0.0089,
                "unit": "W·m[-1]·K[-1]"
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        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/1/18/Die_chemischen_elemente_cl.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Die_chemischen_elemente_cl.jpg\">Alexander C. Wimmer</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0/at/deed.en\">CC BY-SA 3.0 AT</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                12.967632,
                23.81364,
                39.8,
                53.24,
                67.68,
                96.94,
                114.2013
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000405,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "label": "phase-solid",
            "value": 0.00001739,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Chlorine",
            "de": "Chlor",
            "la": "Chlorum"
        },
        "natural_occurrence": "primordial",
        "negativity": {
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            "sanderson": 3.48,
            "allred": 2.83,
            "mulliken": 3.1,
            "allen": 2.869,
            "ghosh_gupta": {
                "value": 7.2923,
                "unit": "eV"
            },
            "boyd": 3.05,
            "nagle": 2.82,
            "pearson": {
                "value": 8.3,
                "unit": "eV"
            }
        },
        "number": 17,
        "optical": {
            "refractive_index": 1.000773
        },
        "oxidation_state": "'''±1''', 3, 4, 5, 6, 7",
        "oxide_character": "acidic",
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        "phase": "gas",
        "price": {
            "value": 0.082,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "vital",
            "stable"
        ],
        "radius": {
            "empirical": {
                "value": 100,
                "unit": "pm"
            },
            "calculated": {
                "value": 79,
                "unit": "pm"
            },
            "covalent": {
                "value": 102,
                "deviation": 4,
                "unit": "pm"
            },
            "vdw": {
                "value": 175,
                "unit": "pm"
            }
        },
        "set": "halogen",
        "shell": [
            2,
            8,
            7
        ],
        "sound_speed": {
            "value": 206,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 35.45,
            "deviation": 0.01,
            "range": [
                35.446,
                35.457
            ]
        },
        "standard_potential": {
            "value": 1.36,
            "unit": "V",
            "info": "Cl + e[-] → Cl[-]"
        },
        "superconductivity": "none",
        "symbol": "Cl",
        "temperature": {
            "melting": {
                "value": 171.6,
                "unit": "K"
            },
            "boiling": {
                "value": 239.11,
                "unit": "K"
            },
            "liquid": {
                "value": 67.51,
                "unit": "K"
            },
            "critical": {
                "value": 416.9,
                "unit": "K",
                "@": {
                    "value": 7.991,
                    "unit": "MPa"
                }
            }
        },
        "wiki": {
            "en": "Chlorine",
            "de": "Chlor"
        }
    },
    "ar": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 200000,
                "unit": "ppb"
            },
            "sun": {
                "value": 70000,
                "unit": "ppb"
            },
            "crust": {
                "value": 1500,
                "unit": "ppb"
            },
            "water": {
                "value": 450,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "colorless gas exhibiting a lilac/violet glow when placed in an electric field",
            "de": "farbloses Gas"
        },
        "atomic_mass": {
            "value": 39.9481,
            "unit": "u"
        },
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7440-37-1"
                }
            ],
            "eg": [
                {
                    "value": "231-147-0"
                }
            ],
            "echa": [
                {
                    "value": "100.028.315"
                }
            ]
        },
        "column": 32,
        "crystal_structure": "fcc",
        "density": {
            "value": 0.001784,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 273,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Ramsay, Strutt",
            "value": 1894
        },
        "electron_config": "Ne 3s[2] 3p[6]",
        "enthalpy": {
            "fusion": {
                "value": 1.18,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 6.5,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 0,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "atmophile",
        "group": 18,
        "hazard": {
            "h": [
                "280"
            ],
            "p": [
                "403"
            ],
            "ghs": [
                "04"
            ],
            "adr": [
                "2.2"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 319,
                "unit": "J·kg[−1]·K[−1]",
                "condition": [
                    {
                        "value": 293.15,
                        "unit": "K"
                    }
                ]
            },
            "thermal_conductivity": {
                "value": 0.01772,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/8/87/Argon_discharge_tube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Argon_discharge_tube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                15.7596117,
                27.62967,
                40.735,
                59.58,
                74.84
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000196,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "label": "phase-solid",
            "value": 0.00002256,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Argon",
            "de": "Argon",
            "la": "Argon"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "sanderson": 3.31,
            "allred": 3.2,
            "mulliken": 3.19,
            "allen": 3.242,
            "ghosh_gupta": {
                "value": 7.6515,
                "unit": "eV"
            },
            "nagle": 3.18
        },
        "number": 18,
        "optical": {
            "refractive_index": 1.000281
        },
        "period": 3,
        "phase": "gas",
        "price": {
            "value": 0.931,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable"
        ],
        "radius": {
            "calculated": {
                "value": 71,
                "unit": "pm"
            },
            "covalent": {
                "value": 106,
                "deviation": 10,
                "unit": "pm"
            },
            "vdw": {
                "value": 188,
                "unit": "pm"
            }
        },
        "set": "noblegas",
        "shell": [
            2,
            8,
            8
        ],
        "sound_speed": {
            "value": 319,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 39.95,
            "deviation": 0.16,
            "range": [
                39.792,
                39.963
            ]
        },
        "superconductivity": "none",
        "symbol": "Ar",
        "temperature": {
            "melting": {
                "value": 83.81,
                "unit": "K"
            },
            "boiling": {
                "value": 87.302,
                "unit": "K"
            },
            "liquid": {
                "value": 3.492,
                "unit": "K"
            },
            "triple": {
                "value": 83.8058,
                "unit": "K",
                "@": {
                    "value": 68.89,
                    "unit": "kPa"
                }
            },
            "critical": {
                "value": 150.687,
                "unit": "K",
                "@": {
                    "value": 4.863,
                    "unit": "MPa"
                }
            }
        },
        "wiki": {
            "en": "Argon",
            "de": "Argon"
        }
    },
    "k": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 3000,
                "unit": "ppb"
            },
            "sun": {
                "value": 4000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 710000,
                "unit": "ppb"
            },
            "crust": {
                "value": 15000000,
                "unit": "ppb"
            },
            "water": {
                "value": 416000,
                "unit": "ppb"
            },
            "stream": {
                "value": 2300,
                "unit": "ppb"
            },
            "human": {
                "value": 2000000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white, faint bluish-purple hue when exposed to air",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
            "value": 39.09831,
            "unit": "u"
        },
        "basicity": "strongly-alkaline",
        "block": "s",
        "classification": {
            "cas": [
                {
                    "value": "7440-09-7"
                }
            ],
            "eg": [
                {
                    "value": "231-119-8"
                }
            ],
            "echa": [
                {
                    "value": "100.028.290"
                }
            ]
        },
        "column": 1,
        "crystal_structure": "bcc",
        "density": {
            "value": 0.856,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Davy",
            "value": 1807
        },
        "elastic": {
            "rigidity": {
                "value": 1.3,
                "unit": "GPa"
            },
            "bulk": {
                "value": 3.1,
                "unit": "GPa"
            }
        },
        "electrical": {
            "conductivity": {
                "value": 14300000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 7.5e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 4s[1]",
        "enthalpy": {
            "fusion": {
                "value": 2.33,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 76.9,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 89,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
        "group": 1,
        "hardness": {
            "mohs": 0.4,
            "brinell": {
                "value": 0.363,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "260",
                "314"
            ],
            "p": [
                "223",
                "231+232",
                "280",
                "305+351+338",
                "370+378"
            ],
            "hazard": [
                "F",
                "C"
            ],
            "ghs": [
                "02",
                "05"
            ],
            "adr": [
                "4.3"
            ],
            "nfpa": {
                "h": "3",
                "f": "3",
                "i": "2",
                "s": "W"
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 757.8,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 100,
                "unit": "W·m[-1]·K[-1]"
            },
            "work_function": {
                "value": 2.3,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/4/44/KaliumunterTetrahydrofuran.JPG",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:KaliumunterTetrahydrofuran.JPG\">Schmid &amp; Rauch</a>, Public domain, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                4.34066369,
                31.625,
                45.8031,
                60.917,
                82.66
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.0000208,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00004594,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Potassium",
            "de": "Kalium",
            "la": "Kalium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 0.82,
            "sanderson": 0.45,
            "allred": 0.91,
            "mulliken": 0.73,
            "allen": 0.734,
            "ghosh_gupta": {
                "value": 2.0027,
                "unit": "eV"
            },
            "boyd": 0.99,
            "nagle": 0.84,
            "pearson": {
                "value": 2.42,
                "unit": "eV"
            }
        },
        "number": 19,
        "oxidation_state": "-1, '''+1'''",
        "oxide_character": "basic",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 12.85,
            "deviation": 1.5,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "vital",
            "stable",
            "light"
        ],
        "radius": {
            "empirical": {
                "value": 227,
                "unit": "pm"
            },
            "calculated": {
                "value": 243,
                "unit": "pm"
            },
            "covalent": {
                "value": 203,
                "deviation": 12,
                "unit": "pm"
            },
            "vdw": {
                "value": 275,
                "unit": "pm"
            }
        },
        "set": "alkalimetal",
        "shell": [
            2,
            8,
            8,
            1
        ],
        "sound_speed": {
            "value": 2000,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 39.0983,
            "deviation": 0.0001
        },
        "standard_potential": {
            "value": -2.931,
            "unit": "V",
            "info": "K[+] + e[-] → K"
        },
        "superconductivity": "none",
        "symbol": "K",
        "temperature": {
            "melting": {
                "value": 336.7,
                "unit": "K"
            },
            "boiling": {
                "value": 1030.793,
                "unit": "K"
            },
            "liquid": {
                "value": 694.093,
                "unit": "K"
            },
            "critical": {
                "value": 2223,
                "unit": "K",
                "@": {
                    "value": 16,
                    "unit": "MPa"
                }
            }
        },
        "wiki": {
            "en": "Potassium",
            "de": "Kalium"
        }
    },
    "ca": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 70000,
                "unit": "ppb"
            },
            "sun": {
                "value": 70000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 11000000,
                "unit": "ppb"
            },
            "crust": {
                "value": 50000000,
                "unit": "ppb"
            },
            "water": {
                "value": 4220,
                "unit": "ppb"
            },
            "stream": {
                "value": 1500,
                "unit": "ppb"
            },
            "human": {
                "value": 14000000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "dull gray, silver; with a pale yellow tint",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
            "value": 40.0784,
            "unit": "u"
        },
        "basicity": "strongly-alkaline",
        "block": "s",
        "classification": {
            "cas": [
                {
                    "value": "7440-70-2"
                }
            ],
            "eg": [
                {
                    "value": "231-179-5"
                }
            ],
            "echa": [
                {
                    "value": "100.028.344"
                }
            ],
            "atc": [
                {
                    "value": "A12AA"
                }
            ]
        },
        "column": 2,
        "crystal_structure": "fcc",
        "density": {
            "value": 1.55,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Davy",
            "value": 1808
        },
        "elastic": {
            "young": {
                "value": 20,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 7.4,
                "unit": "GPa"
            },
            "bulk": {
                "value": 17,
                "unit": "GPa"
            },
            "poisson": 0.31
        },
        "electrical": {
            "conductivity": {
                "value": 29400000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 3.4e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 4s[2]",
        "enthalpy": {
            "fusion": {
                "value": 8.54,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 155,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 178,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
        "group": 2,
        "hardness": {
            "mohs": 1.75,
            "brinell": {
                "value": 167,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "261"
            ],
            "p": [
                "223",
                "232",
                "501",
                "402+404"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ],
            "adr": [
                "4.3"
            ],
            "nfpa": {
                "h": "0",
                "f": "3",
                "i": "1",
                "s": "W"
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 647.3,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 200,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000223,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 2.87,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/9/96/Calcium_unter_Argon_Schutzgasatmosph%C3%A4re.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Calcium_unter_Argon_Schutzgasatmosph%C3%A4re.jpg\">Matthias Zepper</a>, Public domain, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.1131554,
                11.871719,
                50.91316,
                67.2732,
                84.34
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": 0.00004,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "value": 0.0000262,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Calcium",
            "de": "Calcium",
            "la": "Calcium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1,
            "sanderson": 0.95,
            "allred": 1.04,
            "mulliken": 1.08,
            "allen": 1.034,
            "ghosh_gupta": {
                "value": 2.6965,
                "unit": "eV"
            },
            "boyd": 1.34,
            "nagle": 1.11,
            "pearson": {
                "value": 2.2,
                "unit": "eV"
            }
        },
        "number": 20,
        "oxidation_state": "(+1) '''+2'''",
        "oxide_character": "basic",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 2.28,
            "deviation": 0.14,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "vital",
            "stable",
            "light"
        ],
        "radius": {
            "empirical": {
                "value": 197,
                "unit": "pm"
            },
            "calculated": {
                "value": 194,
                "unit": "pm"
            },
            "covalent": {
                "value": 176,
                "deviation": 10,
                "unit": "pm"
            },
            "vdw": {
                "value": 231,
                "unit": "pm"
            }
        },
        "set": "alkalineearthmetal",
        "shell": [
            2,
            8,
            8,
            2
        ],
        "sound_speed": {
            "value": 3810,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 40.078,
            "deviation": 0.004
        },
        "standard_potential": {
            "value": -2.84,
            "unit": "V",
            "info": "Ca[2+] + 2e[-] → Ca"
        },
        "superconductivity": "special",
        "symbol": "Ca",
        "temperature": {
            "melting": {
                "value": 1115,
                "unit": "K"
            },
            "boiling": {
                "value": 1757,
                "unit": "K"
            },
            "liquid": {
                "value": 642,
                "unit": "K"
            },
            "transition": {
                "value": 15,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Calcium",
            "de": "Calcium"
        }
    },
    "sc": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 30,
                "unit": "ppb"
            },
            "sun": {
                "value": 40,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 6500,
                "unit": "ppb"
            },
            "crust": {
                "value": 26000,
                "unit": "ppb"
            },
            "water": {
                "value": 0.0015,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.004,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
            "value": 44.9559085,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7440-20-2"
                }
            ],
            "eg": [
                {
                    "value": "231-129-2"
                }
            ],
            "echa": [
                {
                    "value": "100.028.299"
                }
            ]
        },
        "column": 3,
        "crystal_structure": "hcp",
        "density": {
            "value": 2.985,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Nilson",
            "value": 1879
        },
        "elastic": {
            "young": {
                "value": 74,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 29,
                "unit": "GPa"
            },
            "bulk": {
                "value": 57,
                "unit": "GPa"
            },
            "poisson": 0.28
        },
        "electrical": {
            "conductivity": {
                "value": 1810000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 5.5e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[1] 4s[2]",
        "enthalpy": {
            "fusion": {
                "value": 16,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 318,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 378,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "lithophile",
        "group": 3,
        "hardness": {
            "mohs": 2.5,
            "brinell": {
                "value": 750,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228"
            ],
            "p": [
                "210"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 586,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 16,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000102,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/e/e6/Scandium_sublimed_dendritic_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Scandium_sublimed_dendritic_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.56149,
                12.79977,
                24.756838,
                73.4894,
                91.95
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.000315,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 292,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.000015,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Scandium",
            "de": "Scandium",
            "la": "Scandium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.36,
            "sanderson": 1.02,
            "allred": 1.2,
            "ghosh_gupta": {
                "value": 2.8571,
                "unit": "eV"
            },
            "nagle": 1.17,
            "pearson": {
                "value": 3.34,
                "unit": "eV"
            }
        },
        "number": 21,
        "oxidation_state": "3",
        "oxide_character": "basic",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 3460,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "mononuclidic",
            "stable",
            "light",
            "rare"
        ],
        "radius": {
            "empirical": {
                "value": 162,
                "unit": "pm"
            },
            "calculated": {
                "value": 184,
                "unit": "pm"
            },
            "covalent": {
                "value": 170,
                "deviation": 7,
                "unit": "pm"
            },
            "vdw": {
                "value": 211,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            9,
            2
        ],
        "standard_atomic_weight": {
            "value": 44.955907,
            "deviation": 0.000004
        },
        "standard_potential": {
            "value": -2.03,
            "unit": "V",
            "info": "Sc[3+] + 3e[-] → Sc"
        },
        "superconductivity": "special",
        "symbol": "Sc",
        "temperature": {
            "melting": {
                "value": 1814,
                "unit": "K"
            },
            "boiling": {
                "value": 3109,
                "unit": "K"
            },
            "liquid": {
                "value": 1295,
                "unit": "K"
            },
            "transition": {
                "value": 0.34,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Scandium",
            "de": "Scandium"
        }
    },
    "ti": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 3000,
                "unit": "ppb"
            },
            "sun": {
                "value": 4000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 550000,
                "unit": "ppb"
            },
            "crust": {
                "value": 6600000,
                "unit": "ppb"
            },
            "water": {
                "value": 1,
                "unit": "ppb"
            },
            "stream": {
                "value": 3,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery grey-white metallic",
            "de": "silbrig metallisch"
        },
        "atomic_mass": {
            "value": 47.8671,
            "unit": "u"
        },
        "basicity": "amphoterism",
        "block": "d",
        "classification": {
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                    "value": "7440-32-6"
                }
            ],
            "eg": [
                {
                    "value": "231-142-3"
                }
            ],
            "echa": [
                {
                    "value": "100.028.311"
                }
            ]
        },
        "column": 18,
        "crystal_structure": "hcp",
        "density": {
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            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Gregor, Klaproth",
            "value": 1791
        },
        "elastic": {
            "young": {
                "value": 116,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 44,
                "unit": "GPa"
            },
            "bulk": {
                "value": 110,
                "unit": "GPa"
            },
            "poisson": 0.32
        },
        "electrical": {
            "conductivity": {
                "value": 2500000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 4e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[2] 4s[2]",
        "enthalpy": {
            "fusion": {
                "value": 18.7,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 425,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 471,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "lithophile",
        "group": 4,
        "hardness": {
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            "brinell": {
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                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 970,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "250",
                "252"
            ],
            "p": [
                "210",
                "222",
                "280",
                "420"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 523,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 22,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000086,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 4.33,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/d/db/Titan-crystal_bar.JPG",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Titan-crystal_bar.JPG\">Alchemist-hp (pse-mendelejew.de)</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\">CC BY-SA 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.82812,
                13.5755,
                27.49171,
                43.26717,
                99.299
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.000153,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 293,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00001064,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Titanium",
            "de": "Titan",
            "la": "Titanum"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.54,
            "sanderson": 1.09,
            "allred": 1.32,
            "ghosh_gupta": {
                "value": 3.004,
                "unit": "eV"
            },
            "nagle": 1.23,
            "pearson": {
                "value": 3.45,
                "unit": "eV"
            }
        },
        "number": 22,
        "oxidation_state": "+2, +3, '''+4'''",
        "oxide_character": "amphoteric",
        "period": 4,
        "phase": "solid",
        "price": {
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            "deviation": 0.3,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "stable",
            "light",
            "refractory"
        ],
        "radius": {
            "empirical": {
                "value": 147,
                "unit": "pm"
            },
            "calculated": {
                "value": 176,
                "unit": "pm"
            },
            "covalent": {
                "value": 160,
                "deviation": 8,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            10,
            2
        ],
        "sound_speed": {
            "value": 4140,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 47.867,
            "deviation": 0.001
        },
        "standard_potential": {
            "value": -0.86,
            "unit": "V",
            "info": "TiO[2+] + 2H[+] + 4e[-] → Ti + H{2}O"
        },
        "superconductivity": "normal",
        "symbol": "Ti",
        "temperature": {
            "melting": {
                "value": 1941,
                "unit": "K"
            },
            "boiling": {
                "value": 3560,
                "unit": "K"
            },
            "liquid": {
                "value": 1619,
                "unit": "K"
            },
            "transition": {
                "value": 0.5,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Titanium",
            "de": "Titan (Element)"
        }
    },
    "v": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 1000,
                "unit": "ppb"
            },
            "sun": {
                "value": 400,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 62000,
                "unit": "ppb"
            },
            "crust": {
                "value": 190000,
                "unit": "ppb"
            },
            "water": {
                "value": 1.5,
                "unit": "ppb"
            },
            "stream": {
                "value": 1,
                "unit": "ppb"
            },
            "human": {
                "value": 30,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "blue-silver-grey metal",
            "de": "stahlgrau metallisch, bläulich schimmernd"
        },
        "atomic_mass": {
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            "unit": "u"
        },
        "basicity": "amphoterism",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7440-62-2"
                }
            ],
            "eg": [
                {
                    "value": "231-171-1"
                }
            ],
            "echa": [
                {
                    "value": "100.028.337"
                }
            ]
        },
        "column": 19,
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        "density": {
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            "unit": "g·cm[−3]",
            "condition": [
                {
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                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "del Río",
            "value": 1801
        },
        "elastic": {
            "young": {
                "value": 128,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 47,
                "unit": "GPa"
            },
            "bulk": {
                "value": 160,
                "unit": "GPa"
            },
            "poisson": 0.37
        },
        "electrical": {
            "conductivity": {
                "value": 5000000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 2e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[3] 4s[2]",
        "enthalpy": {
            "fusion": {
                "value": 22.8,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 453,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 515,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
        "group": 5,
        "hardness": {
            "mohs": 7,
            "brinell": {
                "value": 628,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 628,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": null,
        "heat": {
            "heat_capacity": {
                "value": 489,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 31,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000084,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/f/f1/Vanadium_crystal_bar_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Vanadium_crystal_bar_and_1cm3_cube.jpg\">Alchemist-hp (pse-mendelejew.de).</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.746187,
                14.634,
                29.3111,
                46.709,
                65.28165
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.000255,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00000832,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Vanadium",
            "de": "Vanadium",
            "la": "Vanadium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.63,
            "sanderson": 1.39,
            "allred": 1.45,
            "ghosh_gupta": {
                "value": 3.1482,
                "unit": "eV"
            },
            "nagle": 1.27,
            "pearson": {
                "value": 3.6,
                "unit": "eV"
            }
        },
        "number": 23,
        "optical": {
            "reflectivity": {
                "value": 61,
                "unit": "%"
            }
        },
        "oxidation_state": "'''+5''', +4 ,+3 ,+2",
        "oxide_character": "amphoteric",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 371,
            "deviation": 14,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "vital",
            "stable",
            "heavy",
            "refractory"
        ],
        "radius": {
            "empirical": {
                "value": 134,
                "unit": "pm"
            },
            "calculated": {
                "value": 171,
                "unit": "pm"
            },
            "covalent": {
                "value": 153,
                "deviation": 8,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            11,
            2
        ],
        "sound_speed": {
            "value": 4560,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 50.9415,
            "deviation": 0.0001
        },
        "superconductivity": "normal",
        "symbol": "V",
        "temperature": {
            "melting": {
                "value": 2183,
                "unit": "K"
            },
            "boiling": {
                "value": 3680,
                "unit": "K"
            },
            "liquid": {
                "value": 1497,
                "unit": "K"
            },
            "transition": {
                "value": 5.4,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Vanadium",
            "de": "Vanadium"
        }
    },
    "cr": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 15000,
                "unit": "ppb"
            },
            "sun": {
                "value": 20000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 3100000,
                "unit": "ppb"
            },
            "crust": {
                "value": 140000,
                "unit": "ppb"
            },
            "water": {
                "value": 0.6,
                "unit": "ppb"
            },
            "stream": {
                "value": 1,
                "unit": "ppb"
            },
            "human": {
                "value": 30,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery metallic",
            "de": "silbrig metallisch"
        },
        "atomic_mass": {
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            "unit": "u"
        },
        "basicity": "strongly-acidic",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7440-47-3"
                }
            ],
            "eg": [
                {
                    "value": "231-157-5"
                }
            ],
            "echa": [
                {
                    "value": "100.028.324"
                }
            ]
        },
        "column": 20,
        "crystal_structure": "bcc",
        "density": {
            "value": 7.14,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Vauquelin",
            "value": 1797
        },
        "elastic": {
            "young": {
                "value": 279,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 115,
                "unit": "GPa"
            },
            "bulk": {
                "value": 160,
                "unit": "GPa"
            },
            "poisson": 0.21
        },
        "electrical": {
            "conductivity": {
                "value": 7870000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 1.27e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[5] 4s[1]",
        "enthalpy": {
            "fusion": {
                "value": 20.5,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 339,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 397,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "lithophile",
        "group": 6,
        "hardness": {
            "mohs": 8.5,
            "brinell": {
                "value": 1120,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 1060,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": null,
        "heat": {
            "heat_capacity": {
                "value": 449,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 94,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000049,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 4.5,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/0/08/Chromium_crystals_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Chromium_crystals_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a> (FAL or <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>), via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.76651,
                16.486305,
                30.959,
                49.16,
                69.46
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "antiferromagnetic",
        "magnetic_susceptibility": {
            "value": 0.00028,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 273,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00000723,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Chromium",
            "de": "Chrom",
            "la": "Chromium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.66,
            "sanderson": 1.66,
            "allred": 1.56,
            "ghosh_gupta": {
                "value": 3.2951,
                "unit": "eV"
            },
            "nagle": 1.29,
            "pearson": {
                "value": 3.72,
                "unit": "eV"
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        "oxidation_state": "6, 3, 2, 1",
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        "phase": "solid",
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            "unit": "USD"
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            "stable",
            "heavy",
            "refractory"
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        "radius": {
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                "value": 128,
                "unit": "pm"
            },
            "calculated": {
                "value": 166,
                "unit": "pm"
            },
            "covalent": {
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                "deviation": 5,
                "unit": "pm"
            }
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        "shell": [
            2,
            8,
            13,
            1
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        "sound_speed": {
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            "unit": "m·s[−1]",
            "condition": [
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                    "unit": "K"
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            ]
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            "deviation": 0.0006
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            "value": -0.744,
            "unit": "V",
            "info": "Cr[3+] + 3e[-] → Cr"
        },
        "superconductivity": "special",
        "symbol": "Cr",
        "temperature": {
            "melting": {
                "value": 2180,
                "unit": "K"
            },
            "boiling": {
                "value": 2944,
                "unit": "K"
            },
            "liquid": {
                "value": 764,
                "unit": "K"
            },
            "transition": {
                "value": 3,
                "unit": "K"
            }
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        "toxicity": [
            {
                "type": "LC{50}",
                "organism": "fish",
                "application": "#",
                "time": 345600,
                "value": {
                    "value": null,
                    "range": [
                        13.9,
                        210
                    ],
                    "unit": "mg·l[-1]"
                }
            },
            {
                "type": "LC{50}",
                "organism": "crayfish",
                "application": "#",
                "time": 172800,
                "value": {
                    "value": null,
                    "range": [
                        0.002,
                        100
                    ],
                    "unit": "mg·l[-1]"
                }
            },
            {
                "type": "EC{50}",
                "organism": "crayfish",
                "application": "#",
                "time": 172800,
                "value": {
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                    "unit": "mg·l[-1]"
                }
            },
            {
                "type": "EC{50}",
                "organism": "algae",
                "application": "#",
                "time": 259200,
                "value": {
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                    "range": [
                        0.1,
                        17.8
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                    "unit": "mg·l[-1]"
                }
            }
        ],
        "wiki": {
            "en": "Chromium",
            "de": "Chrom"
        }
    },
    "mn": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 8000,
                "unit": "ppb"
            },
            "sun": {
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                "unit": "ppb"
            },
            "meteorite": {
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                "unit": "ppb"
            },
            "crust": {
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                "unit": "ppb"
            },
            "water": {
                "value": 2,
                "unit": "ppb"
            },
            "stream": {
                "value": 5,
                "unit": "ppb"
            },
            "human": {
                "value": 200,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery metallic",
            "de": "silbrig metallisch (Stahlweiß)"
        },
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                {
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            ],
            "eg": [
                {
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            "echa": [
                {
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        },
        "column": 21,
        "crystal_structure": "bcc",
        "density": {
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            "unit": "g·cm[−3]",
            "condition": [
                {
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                    "unit": "K"
                }
            ]
        },
        "discovery": {
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            "value": 1774
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        "elastic": {
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                "value": 198,
                "unit": "GPa"
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                "value": 120,
                "unit": "GPa"
            }
        },
        "electrical": {
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                "value": 694000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 0.00000144,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[5] 4s[2]",
        "enthalpy": {
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                "value": 13.2,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 220,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
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                "unit": "kJ·mol[-1]"
            }
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                "unit": "NM·m[-2]"
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                "228"
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            "p": [
                "210",
                "240",
                "241",
                "280",
                "370+378"
            ],
            "hazard": [
                "F"
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            "ghs": [
                "02"
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            "adr": [
                "4.1"
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                "h": "0",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 479.5,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 7.8,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000217,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 4.1,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/1/1d/Manganese_electrolytic_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Manganese_electrolytic_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
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                15.63999,
                33.668,
                51.21,
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            "unit": "eV"
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            "value": 0.000529,
            "unit": "cm[3]·mol[−1]",
            "condition": [
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                    "unit": "K"
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            ]
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            "unit": "m[3]·mol[−1]"
        },
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            "en": "Manganese",
            "de": "Mangan",
            "la": "Manganum"
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            "sanderson": 2.2,
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                "value": 3.4349,
                "unit": "eV"
            },
            "nagle": 1.36,
            "pearson": {
                "value": 3.72,
                "unit": "eV"
            }
        },
        "number": 25,
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        "period": 4,
        "phase": "solid",
        "price": {
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            "unit": "USD"
        },
        "properties": [
            "natural",
            "vital",
            "mononuclidic",
            "stable",
            "heavy"
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        "radius": {
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                "unit": "pm"
            },
            "calculated": {
                "value": 161,
                "unit": "pm"
            },
            "covalent": {
                "value": 139,
                "deviation": 5,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            13,
            2
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        "sound_speed": {
            "value": 5150,
            "unit": "m·s[−1]",
            "condition": [
                {
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                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
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            "deviation": 0.000002
        },
        "standard_potential": {
            "value": -1.18,
            "unit": "V",
            "info": "Mn[2+] + 2e[-] → Mn"
        },
        "superconductivity": "none",
        "symbol": "Mn",
        "temperature": {
            "melting": {
                "value": 1519,
                "unit": "K"
            },
            "boiling": {
                "value": 2334,
                "unit": "K"
            },
            "liquid": {
                "value": 815,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LD{50}",
                "organism": "rats",
                "application": "oral",
                "value": {
                    "value": 9000,
                    "unit": "mg·kg[-1]"
                }
            },
            {
                "type": "EC{50}",
                "organism": "crayfish",
                "application": "#",
                "time": 172800,
                "value": {
                    "value": 40,
                    "unit": "mg·l[-1]"
                }
            }
        ],
        "wiki": {
            "en": "Manganese",
            "de": "Mangan"
        }
    },
    "fe": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 1100000,
                "unit": "ppb"
            },
            "sun": {
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                "unit": "ppb"
            },
            "meteorite": {
                "value": 220000000,
                "unit": "ppb"
            },
            "crust": {
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                "unit": "ppb"
            },
            "water": {
                "value": 3,
                "unit": "ppb"
            },
            "stream": {
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                "unit": "ppb"
            },
            "human": {
                "value": 60000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "lustrous metallic with a grayish tinge",
            "de": "metallisch glänzend mit einem gräulichen Farbton"
        },
        "atomic_mass": {
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            "unit": "u"
        },
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        "classification": {
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                {
                    "value": "7439-89-6"
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            "eg": [
                {
                    "value": "231-096-4"
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            "echa": [
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        },
        "elastic": {
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                "value": 211,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 82,
                "unit": "GPa"
            },
            "bulk": {
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                "unit": "GPa"
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            "poisson": 0.29
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        "electrical": {
            "conductivity": {
                "value": 10000000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 1e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[6] 4s[2]",
        "enthalpy": {
            "fusion": {
                "value": 13.8,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 347,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 415,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "antiquity",
        "goldschmidt": "siderophile",
        "group": 8,
        "hardness": {
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            "brinell": {
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                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 608,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": null,
        "heat": {
            "heat_capacity": {
                "value": 449,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 80,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000118,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 4.5,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/a/ad/Iron_electrolytic_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Iron_electrolytic_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a> (FAL or <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>), via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                7.9024681,
                16.1992,
                30.651,
                54.91,
                75
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            "unit": "eV"
        },
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        "molar_volume": {
            "value": 0.00000709,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Iron",
            "de": "Eisen",
            "la": "Ferrum"
        },
        "natural_occurrence": "primordial",
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            "sanderson": 2.2,
            "allred": 1.64,
            "ghosh_gupta": {
                "value": 3.5836,
                "unit": "eV"
            },
            "nagle": 1.4,
            "pearson": {
                "value": 4.06,
                "unit": "eV"
            }
        },
        "number": 26,
        "optical": {
            "reflectivity": {
                "value": 65,
                "unit": "%"
            }
        },
        "oxidation_state": "2, '''3''', 4, 5, 6",
        "oxide_character": "basic",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 0.424,
            "unit": "USD"
        },
        "properties": [
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            "native",
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            "stable",
            "heavy",
            "antiquity"
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        "radius": {
            "empirical": {
                "value": 126,
                "unit": "pm"
            },
            "calculated": {
                "value": 156,
                "unit": "pm"
            },
            "covalent": {
                "value": 132,
                "deviation": 3,
                "unit": "pm"
            },
            "vdw": {
                "value": 194,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            14,
            2
        ],
        "sound_speed": {
            "value": 4910,
            "unit": "m·s[−1]",
            "condition": [
                {
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                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 55.845,
            "deviation": 0.002
        },
        "standard_potential": {
            "value": -0.44,
            "unit": "V",
            "info": "Fe[2+] + 2e[-] → Fe"
        },
        "superconductivity": "special",
        "symbol": "Fe",
        "temperature": {
            "melting": {
                "value": 1811,
                "unit": "K"
            },
            "boiling": {
                "value": 3134,
                "unit": "K"
            },
            "liquid": {
                "value": 1323,
                "unit": "K"
            },
            "transition": {
                "value": 2,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Iron",
            "de": "Eisen"
        }
    },
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        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 3000,
                "unit": "ppb"
            },
            "sun": {
                "value": 4000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 600000,
                "unit": "ppb"
            },
            "crust": {
                "value": 30000,
                "unit": "ppb"
            },
            "water": {
                "value": 0.08,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.2,
                "unit": "ppb"
            },
            "human": {
                "value": 20,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "hard lustrous bluish gray metal",
            "de": "stahlgrauer metallisch glänzender Feststoff"
        },
        "atomic_mass": {
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            "unit": "u"
        },
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        "block": "d",
        "classification": {
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                {
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                }
            ],
            "eg": [
                {
                    "value": "231-158-0"
                }
            ],
            "echa": [
                {
                    "value": "100.028.325"
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        "column": 23,
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        "density": {
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            "unit": "g·cm[−3]",
            "condition": [
                {
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                    "unit": "K"
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        },
        "discovery": {
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            "value": 1735
        },
        "elastic": {
            "young": {
                "value": 209,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 75,
                "unit": "GPa"
            },
            "bulk": {
                "value": 180,
                "unit": "GPa"
            },
            "poisson": 0.31
        },
        "electrical": {
            "conductivity": {
                "value": 16700000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 6e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[7] 4s[2]",
        "enthalpy": {
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                "value": 16.2,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 375,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 426,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "siderophile",
        "group": 9,
        "hardness": {
            "mohs": 5,
            "brinell": {
                "value": 700,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 1043,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
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                "302",
                "330",
                "319",
                "317",
                "334",
                "341",
                "350",
                "360F",
                "410"
            ],
            "p": [
                "201",
                "202",
                "210",
                "280",
                "308+313",
                "501"
            ],
            "hazard": [
                "F",
                "T",
                "X",
                "N"
            ],
            "ghs": [
                "02",
                "06",
                "08",
                "09"
            ],
            "adr": [
                "9"
            ],
            "nfpa": {
                "h": "2",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 421,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 100,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.000013,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 5,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/a/a8/Kobalt_electrolytic_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Kobalt_electrolytic_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
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                7.88101,
                17.0844,
                33.5,
                51.27,
                79.5
            ],
            "unit": "eV"
        },
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        "molar_volume": {
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            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Cobalt",
            "de": "Cobalt",
            "la": "Cobaltum"
        },
        "natural_occurrence": "primordial",
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            "pauling": 1.88,
            "sanderson": 2.56,
            "allred": 1.7,
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                "value": 3.7305,
                "unit": "eV"
            },
            "nagle": 1.44,
            "pearson": {
                "value": 4.3,
                "unit": "eV"
            }
        },
        "number": 27,
        "optical": {
            "reflectivity": {
                "value": 67,
                "unit": "%"
            }
        },
        "oxidation_state": "'''2''', 3",
        "oxide_character": "basic",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 32.8,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "vital",
            "mononuclidic",
            "stable",
            "heavy"
        ],
        "radius": {
            "empirical": {
                "value": 125,
                "unit": "pm"
            },
            "calculated": {
                "value": 152,
                "unit": "pm"
            },
            "covalent": {
                "value": 126,
                "deviation": 3,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
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            8,
            15,
            2
        ],
        "sound_speed": {
            "value": 4720,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 58.933194,
            "deviation": 0.000003
        },
        "standard_potential": {
            "value": -0.28,
            "unit": "V",
            "info": "Co[2+] + 2e[-] → Co"
        },
        "superconductivity": "none",
        "symbol": "Co",
        "temperature": {
            "melting": {
                "value": 1768,
                "unit": "K"
            },
            "boiling": {
                "value": 3200,
                "unit": "K"
            },
            "liquid": {
                "value": 1432,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LD{50}",
                "organism": "rats",
                "application": "oral",
                "value": {
                    "value": 6171,
                    "unit": "mg·kg[-1]"
                }
            }
        ],
        "wiki": {
            "en": "Cobalt",
            "de": "Cobalt"
        }
    },
    "ni": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 60000,
                "unit": "ppb"
            },
            "sun": {
                "value": 80000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 13000000,
                "unit": "ppb"
            },
            "crust": {
                "value": 90000,
                "unit": "ppb"
            },
            "water": {
                "value": 2,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.3,
                "unit": "ppb"
            },
            "human": {
                "value": 100,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "glänzend, metallisch, silbrig",
            "de": "lustrous, metallic, and silver with a gold tinge"
        },
        "atomic_mass": {
            "value": 58.69344,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7440-02-0"
                }
            ],
            "eg": [
                {
                    "value": "231-111-4"
                }
            ],
            "echa": [
                {
                    "value": "100.028.283"
                }
            ]
        },
        "column": 24,
        "crystal_structure": "fcc",
        "density": {
            "value": 8.908,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Cronstedt",
            "value": 1751
        },
        "elastic": {
            "young": {
                "value": 200,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 76,
                "unit": "GPa"
            },
            "bulk": {
                "value": 180,
                "unit": "GPa"
            },
            "poisson": 0.31
        },
        "electrical": {
            "conductivity": {
                "value": 13900000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 7.2e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[8] 4s[2]",
        "enthalpy": {
            "fusion": {
                "value": 17.2,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 378,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 431,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "siderophile",
        "group": 10,
        "hardness": {
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            "brinell": {
                "value": 700,
                "unit": "NM·m[-2]"
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            "vickers": {
                "value": 638,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
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                "228",
                "351",
                "372",
                "317",
                "412"
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            "p": [
                "210",
                "302+352",
                "201",
                "280",
                "308+313"
            ],
            "hazard": [
                "F",
                "X"
            ],
            "ghs": [
                "02",
                "07",
                "08"
            ],
            "nfpa": {
                "h": "2",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 444,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 91,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000134,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 5.15,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/5/57/Nickel_chunk.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Nickel_chunk.jpg\">Materialscientist at English Wikipedia</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\">CC BY-SA 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                7.639878,
                18.168838,
                35.187,
                54.92,
                76.06
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "ferromagnetic",
        "molar_volume": {
            "value": 0.00000659,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Nickel",
            "de": "Nickel",
            "la": "Niccolum"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.91,
            "sanderson": 1.94,
            "allred": 1.75,
            "ghosh_gupta": {
                "value": 3.8584,
                "unit": "eV"
            },
            "nagle": 1.47,
            "pearson": {
                "value": 4.4,
                "unit": "eV"
            }
        },
        "number": 28,
        "optical": {
            "reflectivity": {
                "value": 72,
                "unit": "%"
            }
        },
        "oxidation_state": "'''2''', (-1), 0, 1, 3, 4",
        "oxide_character": "basic",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 13.9,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "vital",
            "stable",
            "heavy"
        ],
        "radius": {
            "empirical": {
                "value": 124,
                "unit": "pm"
            },
            "calculated": {
                "value": 149,
                "unit": "pm"
            },
            "covalent": {
                "value": 124,
                "deviation": 4,
                "unit": "pm"
            },
            "vdw": {
                "value": 163,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            16,
            2
        ],
        "sound_speed": {
            "value": 4970,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 58.6934,
            "deviation": 0.0004
        },
        "standard_potential": {
            "value": -0.257,
            "unit": "V",
            "info": "Ni[2+] + 2e[-] → Ni"
        },
        "superconductivity": "none",
        "symbol": "Ni",
        "temperature": {
            "melting": {
                "value": 1728,
                "unit": "K"
            },
            "boiling": {
                "value": 3003,
                "unit": "K"
            },
            "liquid": {
                "value": 1275,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LC{50}",
                "organism": "fish",
                "application": "#",
                "time": 345600,
                "value": {
                    "value": null,
                    "range": [
                        0.0000475,
                        350
                    ],
                    "unit": "mg·l[-1]"
                }
            },
            {
                "type": "LC{50}",
                "organism": "crayfish",
                "application": "#",
                "time": 172800,
                "value": {
                    "value": null,
                    "range": [
                        1.28,
                        9.28
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                    "unit": "mg·l[-1]"
                }
            },
            {
                "type": "EC{50}",
                "organism": "crayfish",
                "application": "#",
                "time": 172800,
                "value": {
                    "value": 1,
                    "unit": "mg·l[-1]"
                }
            }
        ],
        "wiki": {
            "en": "Nickel",
            "de": "Nickel"
        }
    },
    "cu": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 60,
                "unit": "ppb"
            },
            "sun": {
                "value": 700,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 110000,
                "unit": "ppb"
            },
            "crust": {
                "value": 68000,
                "unit": "ppb"
            },
            "water": {
                "value": 3,
                "unit": "ppb"
            },
            "stream": {
                "value": 6,
                "unit": "ppb"
            },
            "human": {
                "value": 1000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "red-orange metallic luster",
            "de": "rotbraun, metallisch"
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        "atomic_mass": {
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            "unit": "u"
        },
        "basicity": "slightly-alkaline",
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        "classification": {
            "cas": [
                {
                    "value": "7440-50-8"
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            ],
            "eg": [
                {
                    "value": "231-159-6"
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            ],
            "echa": [
                {
                    "value": "100.028.326"
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            ]
        },
        "column": 25,
        "crystal_structure": "fcc",
        "density": {
            "value": 8.92,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "elastic": {
            "young": {
                "value": 130,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 48,
                "unit": "GPa"
            },
            "bulk": {
                "value": 140,
                "unit": "GPa"
            },
            "poisson": 0.34
        },
        "electrical": {
            "conductivity": {
                "value": 58100000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 1.72e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[10] 4s[1]",
        "enthalpy": {
            "fusion": {
                "value": 13.1,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 300,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 338,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "antiquity",
        "goldschmidt": "chalcophile",
        "group": 11,
        "hardness": {
            "mohs": 3,
            "brinell": {
                "value": 874,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 369,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228",
                "410"
            ],
            "p": [
                "210",
                "273"
            ],
            "hazard": [
                "F",
                "N"
            ],
            "ghs": [
                "02",
                "09"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 385,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 400,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000165,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 4.65,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/f/f0/NatCopper.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:NatCopper.jpg\">Native_Copper_Macro_Digon3.jpg: “Jonathan Zander (Digon3)&quot;derivative work: Materialscientist</a>, <a href=\"https://creativecommons.org/licenses/by-sa/2.5\">CC BY-SA 2.5</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                7.72638,
                20.29239,
                36.841,
                57.38,
                79.8
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.00000546,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "value": 0.00000711,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Copper",
            "de": "Kupfer",
            "la": "Cuprum"
        },
        "natural_occurrence": "primordial",
        "negativity": {
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            "sanderson": 1.98,
            "allred": 1.75,
            "mulliken": 1.49,
            "ghosh_gupta": {
                "value": 4.0026,
                "unit": "eV"
            },
            "nagle": 1.51,
            "pearson": {
                "value": 4.48,
                "unit": "eV"
            }
        },
        "number": 29,
        "optical": {
            "reflectivity": {
                "value": 90,
                "unit": "%"
            }
        },
        "oxidation_state": "1, '''2''', 3, 4",
        "oxide_character": "basic",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 6,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "vital",
            "stable",
            "heavy",
            "antiquity"
        ],
        "radius": {
            "empirical": {
                "value": 128,
                "unit": "pm"
            },
            "calculated": {
                "value": 145,
                "unit": "pm"
            },
            "covalent": {
                "value": 132,
                "deviation": 4,
                "unit": "pm"
            },
            "vdw": {
                "value": 140,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            1
        ],
        "sound_speed": {
            "value": 3570,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 63.546,
            "deviation": 0.003
        },
        "standard_potential": {
            "value": 0.34,
            "unit": "V",
            "info": "Cu[2+] + 2e[-] → Cu"
        },
        "superconductivity": "none",
        "symbol": "Cu",
        "temperature": {
            "melting": {
                "value": 1357.77,
                "unit": "K"
            },
            "boiling": {
                "value": 2835,
                "unit": "K"
            },
            "liquid": {
                "value": 1477.23,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Copper",
            "de": "Kupfer"
        }
    },
    "zn": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 300,
                "unit": "ppb"
            },
            "sun": {
                "value": 2000,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 180000,
                "unit": "ppb"
            },
            "crust": {
                "value": 79000,
                "unit": "ppb"
            },
            "water": {
                "value": 5,
                "unit": "ppb"
            },
            "stream": {
                "value": 10,
                "unit": "ppb"
            },
            "human": {
                "value": 33000,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silver-gray",
            "de": "bläulich blassgrau"
        },
        "atomic_mass": {
            "value": 65.382,
            "unit": "u"
        },
        "basicity": "amphoterism",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7440-66-6"
                }
            ],
            "eg": [
                {
                    "value": "231-175-3"
                }
            ],
            "echa": [
                {
                    "value": "100.028.341"
                }
            ],
            "atc": [
                {
                    "value": "A12CB"
                }
            ]
        },
        "column": 26,
        "crystal_structure": "hcp",
        "density": {
            "value": 7.14,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "elastic": {
            "young": {
                "value": 108,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 43,
                "unit": "GPa"
            },
            "bulk": {
                "value": 70,
                "unit": "GPa"
            },
            "poisson": 0.25
        },
        "electrical": {
            "conductivity": {
                "value": 16700000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 6e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[10] 4s[2]",
        "enthalpy": {
            "fusion": {
                "value": 7.35,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 119,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 131,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "antiquity",
        "goldschmidt": "chalcophile",
        "group": 12,
        "hardness": {
            "mohs": 2.5,
            "brinell": {
                "value": 412,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "250",
                "260",
                "410"
            ],
            "p": [
                "222",
                "210",
                "231+232",
                "280",
                "370+378",
                "273"
            ],
            "hazard": [
                "F",
                "N"
            ],
            "ghs": [
                "02",
                "09"
            ],
            "adr": [
                "4.2",
                "4.3"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 388,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 120,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000302,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/f/f9/Zinc_fragment_sublimed_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Zinc_fragment_sublimed_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                9.394197,
                17.96439,
                39.7233,
                59.573,
                82.6
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000114,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00000916,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Zinc",
            "de": "Zink",
            "la": "Zincum"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.65,
            "sanderson": 2.23,
            "allred": 1.66,
            "mulliken": 1.65,
            "ghosh_gupta": {
                "value": 4.1332,
                "unit": "eV"
            },
            "nagle": 1.46,
            "pearson": {
                "value": 4.45,
                "unit": "eV"
            }
        },
        "number": 30,
        "optical": {
            "reflectivity": {
                "value": 80,
                "unit": "%"
            },
            "refractive_index": 1.00205
        },
        "oxidation_state": "2",
        "oxide_character": "amphoteric",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 2.55,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "vital",
            "stable",
            "heavy",
            "antiquity"
        ],
        "radius": {
            "empirical": {
                "value": 134,
                "unit": "pm"
            },
            "calculated": {
                "value": 142,
                "unit": "pm"
            },
            "covalent": {
                "value": 122,
                "deviation": 4,
                "unit": "pm"
            },
            "vdw": {
                "value": 139,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            2
        ],
        "sound_speed": {
            "value": 3700,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 65.38,
            "deviation": 0.02
        },
        "standard_potential": {
            "value": -0.7926,
            "unit": "V",
            "info": "Zn[2+] + 2e[-] → Zn"
        },
        "superconductivity": "normal",
        "symbol": "Zn",
        "temperature": {
            "melting": {
                "value": 692.68,
                "unit": "K"
            },
            "boiling": {
                "value": 1180,
                "unit": "K"
            },
            "liquid": {
                "value": 487.32,
                "unit": "K"
            },
            "transition": {
                "value": 0.85,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Zinc",
            "de": "Zink"
        }
    },
    "ga": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 10,
                "unit": "ppb"
            },
            "sun": {
                "value": 40,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 7800,
                "unit": "ppb"
            },
            "crust": {
                "value": 19000,
                "unit": "ppb"
            },
            "water": {
                "value": 0.03,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.15,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery blue",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
            "value": 69.7231,
            "unit": "u"
        },
        "basicity": "amphoterism",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7440-55-3"
                }
            ],
            "eg": [
                {
                    "value": "231-163-8"
                }
            ],
            "echa": [
                {
                    "value": "100.028.330"
                }
            ]
        },
        "column": 27,
        "crystal_structure": "orth",
        "density": {
            "value": 5.904,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Lecoq de Boisbaudran",
            "value": 1875
        },
        "electrical": {
            "conductivity": {
                "value": 7140000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 1.4e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[10] 4s[2] 4p[1]",
        "enthalpy": {
            "fusion": {
                "value": 5.59,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 256,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 277,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "chalcophile",
        "group": 13,
        "hardness": {
            "mohs": 1.5,
            "brinell": {
                "value": 60,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "290",
                "302",
                "412"
            ],
            "p": [
                "234",
                "264",
                "270",
                "273",
                "301+312",
                "390"
            ],
            "hazard": [
                "C",
                "X"
            ],
            "ghs": [
                "05",
                "07"
            ],
            "adr": [
                "8"
            ],
            "nfpa": {
                "h": "1",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 371,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 29,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.00012,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/9/92/Gallium_crystals.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Gallium_crystals.jpg\">en:user:foobar</a>, <a href=\"http://creativecommons.org/licenses/by-sa/3.0/\">CC BY-SA 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                5.999302,
                20.51514,
                30.72576,
                63.241,
                86.01
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000216,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 290,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.0000118,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Gallium",
            "de": "Gallium",
            "la": "Gallium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.81,
            "sanderson": 2.42,
            "allred": 1.82,
            "mulliken": 2.01,
            "allen": 1.756,
            "ghosh_gupta": {
                "value": 4.6638,
                "unit": "eV"
            },
            "boyd": 1.75,
            "nagle": 1.56,
            "pearson": {
                "value": 3.2,
                "unit": "eV"
            }
        },
        "number": 31,
        "oxidation_state": "3",
        "oxide_character": "amphoteric",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 148,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "heavy"
        ],
        "radius": {
            "empirical": {
                "value": 135,
                "unit": "pm"
            },
            "calculated": {
                "value": 136,
                "unit": "pm"
            },
            "covalent": {
                "value": 122,
                "deviation": 3,
                "unit": "pm"
            },
            "vdw": {
                "value": 187,
                "unit": "pm"
            }
        },
        "set": "metal",
        "shell": [
            2,
            8,
            18,
            3
        ],
        "sound_speed": {
            "value": 2740,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 69.723,
            "deviation": 0.001
        },
        "standard_potential": {
            "value": -0.53,
            "unit": "V",
            "info": "Ga[3+] + 3e[-] → Ga"
        },
        "superconductivity": "normal",
        "symbol": "Ga",
        "temperature": {
            "melting": {
                "value": 302.9146,
                "unit": "K"
            },
            "boiling": {
                "value": 2673,
                "unit": "K"
            },
            "liquid": {
                "value": 2370.0854,
                "unit": "K"
            },
            "transition": {
                "value": 1.08,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Gallium",
            "de": "Gallium"
        }
    },
    "ge": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 200,
                "unit": "ppb"
            },
            "sun": {
                "value": 200,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 21000,
                "unit": "ppb"
            },
            "crust": {
                "value": 1400,
                "unit": "ppb"
            },
            "water": {
                "value": 0.06,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "grayish-white",
            "de": "gräulich weiß"
        },
        "atomic_mass": {
            "value": 72.6308,
            "unit": "u"
        },
        "basicity": "amphoterism",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7440-56-4"
                }
            ],
            "eg": [
                {
                    "value": "231-164-3"
                }
            ],
            "echa": [
                {
                    "value": "100.028.331"
                }
            ]
        },
        "column": 28,
        "crystal_structure": "dc",
        "density": {
            "value": 5.323,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Winkler",
            "value": 1886
        },
        "electrical": {
            "conductivity": {
                "value": 2,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 0.0005,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[10] 4s[2] 4p[2]",
        "enthalpy": {
            "fusion": {
                "value": 31.8,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 334,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 377,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "chalcophile",
        "group": 14,
        "hardness": {
            "mohs": 6
        },
        "hazard": {
            "h": [
                "228"
            ],
            "p": [
                "210"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ],
            "adr": [
                "4.1"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 308.3,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 60,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.000006,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 5,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/0/08/Polycrystalline-germanium.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Polycrystalline-germanium.jpg\">Jurii</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                7.899435,
                15.93461,
                34.0576,
                45.7155,
                90.5001
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000768,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "value": 0.00001363,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Germanium",
            "de": "Germanium",
            "la": "Germanium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.01,
            "sanderson": 2.62,
            "allred": 2.02,
            "mulliken": 2.33,
            "allen": 1.994,
            "ghosh_gupta": {
                "value": 5.1318,
                "unit": "eV"
            },
            "boyd": 1.99,
            "nagle": 1.81,
            "pearson": {
                "value": 4.6,
                "unit": "eV"
            }
        },
        "number": 32,
        "oxidation_state": "-4, 2, '''4'''",
        "oxide_character": "amphoteric",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 962,
            "deviation": 48,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "semiconductor",
            "heavy"
        ],
        "radius": {
            "empirical": {
                "value": 122,
                "unit": "pm"
            },
            "calculated": {
                "value": 125,
                "unit": "pm"
            },
            "covalent": {
                "value": 122,
                "unit": "pm"
            },
            "vdw": {
                "value": 211,
                "unit": "pm"
            }
        },
        "set": "metalloid",
        "shell": [
            2,
            8,
            18,
            4
        ],
        "sound_speed": {
            "value": 5400,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 72.63,
            "deviation": 0.008
        },
        "standard_potential": {
            "value": 0.247,
            "unit": "V",
            "info": "Ge[2+] + 2e[-] → Ge"
        },
        "superconductivity": "special",
        "symbol": "Ge",
        "temperature": {
            "melting": {
                "value": 1211.4,
                "unit": "K"
            },
            "boiling": {
                "value": 3106,
                "unit": "K"
            },
            "liquid": {
                "value": 1894.6,
                "unit": "K"
            },
            "transition": {
                "value": 5.4,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Germanium",
            "de": "Germanium"
        }
    },
    "as": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 8,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 1800,
                "unit": "ppb"
            },
            "crust": {
                "value": 2100,
                "unit": "ppb"
            },
            "water": {
                "value": 2.3,
                "unit": "ppb"
            },
            "stream": {
                "value": 1,
                "unit": "ppb"
            },
            "human": {
                "value": 50,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "metallic grey",
            "de": "metallisch grau, gelb oder schwarz"
        },
        "atomic_mass": {
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            "unit": "u"
        },
        "basicity": "amphoterism",
        "block": "p",
        "classification": {
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                {
                    "value": "7440-38-2"
                }
            ],
            "eg": [
                {
                    "value": "231-148-6"
                }
            ],
            "echa": [
                {
                    "value": "100.028.316"
                }
            ]
        },
        "column": 29,
        "crystal_structure": "rho",
        "density": [
            {
                "label": "gray",
                "value": 5.73,
                "unit": "g·cm[−3]"
            },
            {
                "label": "yellow",
                "value": 1.97,
                "unit": "g·cm[−1]"
            },
            {
                "label": "black",
                "value": 4.9,
                "range": [
                    4.7,
                    5.1
                ],
                "unit": "g·cm[−1]"
            }
        ],
        "discovery": {
            "by": "Albertus Magnus",
            "value": 1300
        },
        "elastic": {
            "young": {
                "value": 8,
                "unit": "GPa"
            },
            "bulk": {
                "value": 22,
                "unit": "GPa"
            }
        },
        "electrical": {
            "conductivity": {
                "value": 3030000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 3.3e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[10] 4s[2] 4p[3]",
        "enthalpy": {
            "fusion": {
                "value": 27.7,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 32.4,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 302,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "chalcophile",
        "group": 15,
        "hardness": {
            "mohs": 3.5,
            "brinell": {
                "value": 1440,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "301+331",
                "350",
                "410"
            ],
            "p": [
                "264",
                "280",
                "301+310",
                "304+340+311"
            ],
            "hazard": [
                "T",
                "N"
            ],
            "ghs": [
                "06",
                "09"
            ],
            "adr": [
                "6.1"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 328.5,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 50,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/8/8b/Native_arsenic.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Native_arsenic.jpg\">Aram Dulyan (User:Aramgutang)</a>, Public domain, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                9.78855,
                18.5892,
                28.349,
                50.15,
                62.77
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000055,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "value": 0.00001295,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Arsenic",
            "de": "Arsen",
            "la": "Arsenicum"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.18,
            "sanderson": 2.82,
            "allred": 2.2,
            "mulliken": 2.26,
            "allen": 2.211,
            "ghosh_gupta": {
                "value": 5.5372,
                "unit": "eV"
            },
            "boyd": 2.21,
            "nagle": 2.11,
            "pearson": {
                "value": 5.3,
                "unit": "eV"
            }
        },
        "number": 33,
        "optical": {
            "refractive_index": 1.001552
        },
        "oxidation_state": "-3, '''3''', 5",
        "oxide_character": "amphoteric",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 1.15,
            "deviation": 0.16,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "mononuclidic",
            "stable",
            "heavy"
        ],
        "radius": {
            "empirical": {
                "value": 119,
                "unit": "pm"
            },
            "calculated": {
                "value": 114,
                "unit": "pm"
            },
            "covalent": {
                "value": 119,
                "deviation": 4,
                "unit": "pm"
            },
            "vdw": {
                "value": 185,
                "unit": "pm"
            }
        },
        "set": "metalloid",
        "shell": [
            2,
            8,
            18,
            5
        ],
        "standard_atomic_weight": {
            "value": 74.921595,
            "deviation": 0.000006
        },
        "standard_potential": {
            "value": 0.24,
            "unit": "V",
            "info": "½As{2}O{3} + 3H[+] + 3e[-] → As + 1½H{2}O"
        },
        "superconductivity": "special",
        "symbol": "As",
        "temperature": {
            "sublimation": {
                "value": 887,
                "unit": "K"
            },
            "triple": {
                "value": 1090,
                "unit": "K",
                "@": {
                    "value": 3628,
                    "unit": "kPa"
                }
            },
            "critical": {
                "value": 1673,
                "*": true,
                "unit": "K"
            },
            "transition": {
                "value": 2.7,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LD{50}",
                "organism": "human",
                "application": "oral",
                "value": {
                    "value": 1.4,
                    "unit": "mg·kg[-1]"
                }
            }
        ],
        "wiki": {
            "en": "Arsenic",
            "de": "Arsen"
        }
    },
    "se": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 30,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 13000,
                "unit": "ppb"
            },
            "crust": {
                "value": 50,
                "unit": "ppb"
            },
            "water": {
                "value": 0.45,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.2,
                "unit": "ppb"
            },
            "human": {
                "value": 50,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "grey metallic-looking, red, and vitreous black allotropes",
            "de": "grau, glänzend"
        },
        "atomic_mass": {
            "value": 78.9718,
            "unit": "u"
        },
        "basicity": "strongly-acidic",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7782-49-2"
                }
            ],
            "eg": [
                {
                    "value": "231-957-4"
                }
            ],
            "echa": [
                {
                    "value": "100.029.052"
                }
            ]
        },
        "column": 30,
        "crystal_structure": "hex",
        "density": [
            {
                "label": "black",
                "value": 4.28,
                "unit": "g·cm[−3]",
                "condition": [
                    {
                        "value": 333.15,
                        "unit": "K"
                    }
                ]
            },
            {
                "label": "gray",
                "value": 4.819,
                "unit": "g·cm[−1]",
                "condition": [
                    {
                        "value": 298.15,
                        "unit": "K"
                    }
                ]
            },
            {
                "label": "red",
                "value": 4.48,
                "unit": "g·cm[−1]",
                "condition": [
                    {
                        "value": 298.15,
                        "unit": "K"
                    }
                ]
            }
        ],
        "discovery": {
            "by": "Berzelius",
            "value": 1817
        },
        "elastic": {
            "young": {
                "value": 10,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 3.7,
                "unit": "GPa"
            },
            "bulk": {
                "value": 8.3,
                "unit": "GPa"
            },
            "poisson": 0.33
        },
        "electron_config": "Ar 3d[10] 4s[2] 4p[4]",
        "enthalpy": {
            "fusion": {
                "value": 5.4,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 26,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 227,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "chalcophile",
        "group": 16,
        "hardness": {
            "mohs": 2,
            "brinell": {
                "value": 736,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "331",
                "301",
                "373",
                "413"
            ],
            "p": [
                "260",
                "273",
                "301+310",
                "304+340"
            ],
            "hazard": [
                "T",
                "X"
            ],
            "ghs": [
                "06",
                "08"
            ],
            "adr": [
                "6.1"
            ],
            "nfpa": {
                "h": "2",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "thermal_conductivity": {
                "value": 0.52,
                "unit": "W·m[-1]·K[-1]"
            },
            "work_function": {
                "value": 5.9,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/e/e6/Selenium_in_sandstone_Westwater_Canyon_Section_23_Mine_Grants%2C_New_Mexico.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Selenium_in_sandstone_Westwater_Canyon_Section_23_Mine_Grants,_New_Mexico.jpg\">James St. John</a>, <a href=\"https://creativecommons.org/licenses/by/2.0\">CC BY 2.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                9.752392,
                21.196,
                31.697,
                42.947,
                68.3,
                81.83
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.000025,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00001642,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Selenium",
            "de": "Selen",
            "la": "Selenum"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.55,
            "sanderson": 3.01,
            "allred": 2.48,
            "mulliken": 2.6,
            "allen": 2.424,
            "ghosh_gupta": {
                "value": 5.8746,
                "unit": "eV"
            },
            "boyd": 2.46,
            "nagle": 2.31,
            "pearson": {
                "value": 5.89,
                "unit": "eV"
            }
        },
        "number": 34,
        "optical": {
            "refractive_index": 1.000895
        },
        "oxidation_state": "±2, '''4''', 6",
        "oxide_character": "acidic",
        "period": 4,
        "phase": "solid",
        "price": {
            "value": 21.4,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "vital",
            "stable",
            "semiconductor"
        ],
        "radius": {
            "empirical": {
                "value": 120,
                "unit": "pm"
            },
            "calculated": {
                "value": 103,
                "unit": "pm"
            },
            "covalent": {
                "value": 120,
                "deviation": 4,
                "unit": "pm"
            },
            "vdw": {
                "value": 190,
                "unit": "pm"
            }
        },
        "set": "metalloid",
        "shell": [
            2,
            8,
            18,
            6
        ],
        "sound_speed": {
            "value": 3350,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 78.971,
            "deviation": 0.008
        },
        "standard_potential": {
            "value": -0.67,
            "unit": "V",
            "info": "Se + 2e[-] → Se[2-]"
        },
        "superconductivity": "special",
        "symbol": "Se",
        "temperature": {
            "melting": {
                "value": 494,
                "unit": "K"
            },
            "boiling": {
                "value": 958,
                "unit": "K"
            },
            "liquid": {
                "value": 464,
                "unit": "K"
            },
            "critical": {
                "value": 1766,
                "unit": "K",
                "@": {
                    "value": 27.2,
                    "unit": "MPa"
                }
            },
            "transition": {
                "value": 7,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Selenium",
            "de": "Selen"
        }
    },
    "br": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 7,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 1200,
                "unit": "ppb"
            },
            "crust": {
                "value": 3000,
                "unit": "ppb"
            },
            "water": {
                "value": 67300,
                "unit": "ppb"
            },
            "stream": {
                "value": 20,
                "unit": "ppb"
            },
            "human": {
                "value": 2900,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "reddish-brown",
            "de": "rotbraun (gasförmig); rotbraun (flüssig); metallisch glänzend (fest)"
        },
        "atomic_mass": {
            "value": 79.90479,
            "unit": "u"
        },
        "basicity": "strongly-acidic",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7726-95-6"
                }
            ],
            "eg": [
                {
                    "value": "231-778-1"
                }
            ],
            "echa": [
                {
                    "value": "100.028.890"
                }
            ]
        },
        "column": 31,
        "crystal_structure": "orth",
        "density": {
            "value": 3.12,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 300,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Balard",
            "value": 1826
        },
        "elastic": {
            "bulk": {
                "value": 1.9,
                "unit": "GPa"
            }
        },
        "electrical": {
            "resistivity": {
                "value": 100000000000,
                "unit": "Ωm"
            }
        },
        "electron_config": "Ar 3d[10] 4s[2] 4p[5]",
        "enthalpy": {
            "fusion": {
                "value": 5.8,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 14.8,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 112,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
        "group": 17,
        "hazard": {
            "h": [
                "330",
                "314",
                "400"
            ],
            "p": [
                "260",
                "273",
                "280",
                "303+361+353",
                "304+340+310",
                "305+351+338"
            ],
            "hazard": [
                "C",
                "T",
                "N"
            ],
            "ghs": [
                "05",
                "06",
                "09"
            ],
            "adr": [
                "6.1",
                "8",
                "9"
            ],
            "nfpa": {
                "h": "3",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "thermal_conductivity": {
                "value": 0.12,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/8/87/Bromine-ampoule.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Bromine-ampoule.jpg\">Jurii</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                11.81381,
                21.591,
                34.871,
                47.782,
                59.595,
                87.39,
                103.03
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000564,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "label": "phase-solid",
            "value": 0.00001978,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Bromine",
            "de": "Brom",
            "la": "Bromum"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.96,
            "sanderson": 3.22,
            "allred": 2.74,
            "mulliken": 2.95,
            "allen": 2.685,
            "ghosh_gupta": {
                "value": 6.1658,
                "unit": "eV"
            },
            "boyd": 2.75,
            "nagle": 2.56,
            "pearson": {
                "value": 7.59,
                "unit": "eV"
            }
        },
        "number": 35,
        "optical": {
            "refractive_index": 1.001132
        },
        "oxidation_state": "±1, 3, 5, 7",
        "oxide_character": "acidic",
        "period": 4,
        "phase": "liquid",
        "price": {
            "value": 4.39,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "vital",
            "stable"
        ],
        "radius": {
            "empirical": {
                "value": 120,
                "unit": "pm"
            },
            "calculated": {
                "value": 94,
                "unit": "pm"
            },
            "covalent": {
                "value": 120,
                "deviation": 3,
                "unit": "pm"
            },
            "vdw": {
                "value": 185,
                "unit": "pm"
            }
        },
        "set": "halogen",
        "shell": [
            2,
            8,
            18,
            7
        ],
        "standard_atomic_weight": {
            "value": 79.904,
            "deviation": 0.003,
            "range": [
                79.901,
                79.907
            ]
        },
        "standard_potential": {
            "value": 1.066,
            "unit": "V",
            "info": "Br + e[-] → Br[-]"
        },
        "superconductivity": "special",
        "symbol": "Br",
        "temperature": {
            "melting": {
                "value": 265.8,
                "unit": "K"
            },
            "boiling": {
                "value": 332,
                "unit": "K"
            },
            "liquid": {
                "value": 66.2,
                "unit": "K"
            },
            "triple": {
                "value": 265.9,
                "unit": "K",
                "@": {
                    "value": 5.8,
                    "unit": "kPa"
                }
            },
            "critical": {
                "value": 588,
                "unit": "K",
                "@": {
                    "value": 10.34,
                    "unit": "MPa"
                }
            },
            "transition": {
                "value": 1.4,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LD{50}",
                "organism": "rats",
                "application": "oral",
                "value": {
                    "value": 2600,
                    "unit": "mg·kg[-1]"
                }
            },
            {
                "type": "LD{50}",
                "organism": "mouse",
                "application": "oral",
                "value": {
                    "value": 3100,
                    "unit": "mg·kg[-1]"
                }
            },
            {
                "type": "LD{Lo}",
                "organism": "human",
                "application": "oral",
                "value": {
                    "value": 14,
                    "unit": "mg·kg[-1]"
                }
            },
            {
                "type": "LC{Lo}",
                "organism": "human",
                "application": "inhalative",
                "value": {
                    "value": 1000,
                    "unit": "ppm"
                }
            }
        ],
        "wiki": {
            "en": "Bromine",
            "de": "Brom"
        }
    },
    "kr": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 40,
                "unit": "ppb"
            },
            "crust": {
                "value": 0.15,
                "unit": "ppb"
            },
            "water": {
                "value": 0.21,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "colorless gas, exhibiting a whitish glow in an electric field",
            "de": "farbloses Gas"
        },
        "atomic_mass": {
            "value": 83.7982,
            "unit": "u"
        },
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7439-90-9"
                }
            ],
            "eg": [
                {
                    "value": "231-098-5"
                }
            ],
            "echa": [
                {
                    "value": "100.028.271"
                }
            ],
            "atc": [
                {
                    "value": "V09EX01",
                    "label": "[81m]Kr"
                }
            ]
        },
        "column": 32,
        "crystal_structure": "fcc",
        "density": {
            "value": 0.0037491,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 273.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Ramsay, Travers",
            "value": 1898
        },
        "electron_config": "Ar 3d[10] 4s[2] 4p[6]",
        "enthalpy": {
            "fusion": {
                "value": 1.64,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 9.02,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 0,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "atmophile",
        "group": 18,
        "hazard": {
            "h": [
                "280"
            ],
            "p": [
                "403"
            ],
            "ghs": [
                "04"
            ],
            "adr": [
                "2.2"
            ]
        },
        "heat": {
            "thermal_conductivity": {
                "value": 0.00949,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/5/50/Krypton_discharge_tube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Krypton_discharge_tube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                13.9996053,
                24.35984,
                35.838,
                50.85,
                64.69
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000288,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "label": "phase-solid",
            "value": 0.00002799,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Krypton",
            "de": "Krypton",
            "la": "Krypton"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 3,
            "sanderson": 2.91,
            "allred": 2.94,
            "mulliken": 3,
            "allen": 2.966,
            "ghosh_gupta": {
                "value": 6.3916,
                "unit": "eV"
            },
            "nagle": 2.82
        },
        "number": 36,
        "optical": {
            "refractive_index": 1.000427
        },
        "period": 4,
        "phase": "gas",
        "price": {
            "value": 290,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable"
        ],
        "radius": {
            "calculated": {
                "value": 88,
                "unit": "pm"
            },
            "covalent": {
                "value": 116,
                "deviation": 4,
                "unit": "pm"
            },
            "vdw": {
                "value": 202,
                "unit": "pm"
            }
        },
        "set": "noblegas",
        "shell": [
            2,
            8,
            18,
            8
        ],
        "sound_speed": {
            "value": 1120,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 83.798,
            "deviation": 0.002
        },
        "superconductivity": "none",
        "symbol": "Kr",
        "temperature": {
            "melting": {
                "value": 115.78,
                "unit": "K"
            },
            "boiling": {
                "value": 119.93,
                "unit": "K"
            },
            "liquid": {
                "value": 4.15,
                "unit": "K"
            },
            "triple": {
                "value": 115.775,
                "unit": "K",
                "@": {
                    "value": 73.53,
                    "unit": "kPa"
                }
            },
            "critical": {
                "value": 209.48,
                "unit": "K",
                "@": {
                    "value": 5.525,
                    "unit": "MPa"
                }
            }
        },
        "wiki": {
            "en": "Krypton",
            "de": "Krypton"
        }
    },
    "rb": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 10,
                "unit": "ppb"
            },
            "sun": {
                "value": 30,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 3300,
                "unit": "ppb"
            },
            "crust": {
                "value": 60000,
                "unit": "ppb"
            },
            "water": {
                "value": 120,
                "unit": "ppb"
            },
            "stream": {
                "value": 1,
                "unit": "ppb"
            },
            "human": {
                "value": 4600,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "grey white",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
            "value": 85.46783,
            "unit": "u"
        },
        "basicity": "strongly-alkaline",
        "block": "s",
        "classification": {
            "cas": [
                {
                    "value": "7440-17-7"
                }
            ],
            "eg": [
                {
                    "value": "231-126-6"
                }
            ],
            "echa": [
                {
                    "value": "100.028.296"
                }
            ]
        },
        "column": 1,
        "crystal_structure": "bcc",
        "density": {
            "value": 1.532,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Bunsen, Kirchhoff",
            "value": 1861
        },
        "elastic": {
            "young": {
                "value": 2.4,
                "unit": "GPa"
            },
            "bulk": {
                "value": 2.5,
                "unit": "GPa"
            }
        },
        "electrical": {
            "conductivity": {
                "value": 7520000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 1.33e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Kr 5s[1]",
        "enthalpy": {
            "fusion": {
                "value": 2.19,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 72,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 81,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "lithophile",
        "group": 1,
        "hardness": {
            "mohs": 0.3,
            "brinell": {
                "value": 0.216,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "260",
                "314"
            ],
            "p": [
                "223",
                "231+232",
                "280",
                "305+351+338",
                "370+378"
            ],
            "hazard": [
                "F",
                "C"
            ],
            "ghs": [
                "02",
                "05"
            ],
            "adr": [
                "4.3"
            ],
            "nfpa": {
                "h": "3",
                "f": "4",
                "i": "2",
                "s": "W"
            }
        },
        "heat": {
            "thermal_conductivity": {
                "value": 58,
                "unit": "W·m[-1]·K[-1]"
            },
            "work_function": {
                "value": 2.16,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/c/c9/Rb5.JPG",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Rb5.JPG\">Dnn87</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                4.177128,
                27.28954,
                39.247,
                52.2,
                68.44
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.000017,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 303,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00005576,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Rubidium",
            "de": "Rubidium",
            "la": "Rubidium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 0.82,
            "sanderson": 0.31,
            "allred": 0.89,
            "mulliken": 0.69,
            "allen": 0.706,
            "ghosh_gupta": {
                "value": 2.0135,
                "unit": "eV"
            },
            "nagle": 0.83,
            "pearson": {
                "value": 2.34,
                "unit": "eV"
            }
        },
        "number": 37,
        "oxidation_state": "-1, '''+1'''",
        "oxide_character": "basic",
        "period": 5,
        "phase": "solid",
        "price": {
            "value": 15500,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "light"
        ],
        "radius": {
            "empirical": {
                "value": 248,
                "unit": "pm"
            },
            "calculated": {
                "value": 265,
                "unit": "pm"
            },
            "covalent": {
                "value": 220,
                "deviation": 9,
                "unit": "pm"
            },
            "vdw": {
                "value": 303,
                "unit": "pm"
            }
        },
        "set": "alkalimetal",
        "shell": [
            2,
            8,
            18,
            8,
            1
        ],
        "sound_speed": {
            "value": 1300,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
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            ]
        },
        "standard_atomic_weight": {
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            "unit": "V",
            "info": "Rb[+] + e[-] → Rb"
        },
        "superconductivity": "none",
        "symbol": "Rb",
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                "value": 312.45,
                "unit": "K"
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                "value": 961,
                "unit": "K"
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                "value": 2093,
                "*": true,
                "unit": "K",
                "@": {
                    "value": 16,
                    "unit": "MPa"
                }
            }
        },
        "wiki": {
            "en": "Rubidium",
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        }
    },
    "sr": {
        "@modified": "2023-11-04T10:30:10.482Z",
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            "condition": [
                {
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            "poisson": 0.28
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                "unit": "S·m[-1]"
            },
            "resistivity": {
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                "unit": "Ωm"
            }
        },
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        "enthalpy": {
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                "unit": "kJ·mol[-1]"
            },
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                "value": 137,
                "unit": "kJ·mol[-1]"
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            "atomisation": {
                "value": 164,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
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                "X"
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            "nfpa": {
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                "i": "2",
                "s": "W"
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        "heat": {
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                "unit": "W·m[-1]·K[-1]"
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                "unit": "K[-1]"
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        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/4/41/Strontium_destilled_crystals.jpg",
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        },
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                11.0302764,
                42.88353,
                56.28,
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                    "unit": "K"
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            ]
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        "molar_volume": {
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        },
        "names": {
            "en": "Strontium",
            "de": "Strontium",
            "la": "Strontium"
        },
        "natural_occurrence": "primordial",
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            "sanderson": 0.72,
            "allred": 0.99,
            "mulliken": 1,
            "allen": 0.963,
            "ghosh_gupta": {
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                "unit": "eV"
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        },
        "number": 38,
        "oxidation_state": "+2",
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        "price": {
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            "deviation": 0.08,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "light"
        ],
        "radius": {
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                "value": 215,
                "unit": "pm"
            },
            "calculated": {
                "value": 219,
                "unit": "pm"
            },
            "covalent": {
                "value": 195,
                "deviation": 10,
                "unit": "pm"
            },
            "vdw": {
                "value": 249,
                "unit": "pm"
            }
        },
        "set": "alkalineearthmetal",
        "shell": [
            2,
            8,
            18,
            8,
            2
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        "standard_atomic_weight": {
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            "deviation": 0.01
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        "standard_potential": {
            "value": -2.89,
            "unit": "V",
            "info": "Sr[2+] + 2e[-] → Sr"
        },
        "superconductivity": "special",
        "symbol": "Sr",
        "temperature": {
            "melting": {
                "value": 1050,
                "unit": "K"
            },
            "boiling": {
                "value": 1650,
                "unit": "K"
            },
            "liquid": {
                "value": 600,
                "unit": "K"
            },
            "transition": {
                "value": 4,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Strontium",
            "de": "Strontium"
        }
    },
    "y": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 7,
                "unit": "ppb"
            },
            "sun": {
                "value": 10,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 1900,
                "unit": "ppb"
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            "crust": {
                "value": 29000,
                "unit": "ppb"
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            "water": {
                "value": 0.013,
                "unit": "ppb"
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                "unit": "ppb"
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        },
        "appearance": {
            "en": "silvery white",
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            "unit": "u"
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                    "value": "7440-65-5"
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            ],
            "eg": [
                {
                    "value": "231-174-8"
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            "echa": [
                {
                    "value": "100.028.340"
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            ]
        },
        "column": 3,
        "crystal_structure": "hcp",
        "density": {
            "value": 4.472,
            "unit": "g·cm[−3]"
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        "discovery": {
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                "value": 64,
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                "value": 26,
                "unit": "GPa"
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            "bulk": {
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                "unit": "GPa"
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            "poisson": 0.24
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        "electrical": {
            "conductivity": {
                "value": 1660000,
                "unit": "S·m[-1]"
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            "resistivity": {
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        },
        "electron_config": "Kr 4d[1] 5s[2]",
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                "value": 11.4,
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                "value": 380,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 425,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "lithophile",
        "group": 3,
        "hardness": {
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                "value": 589,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228"
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            "p": [
                "210",
                "241",
                "280",
                "241",
                "370+378"
            ],
            "hazard": [
                "F"
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            "ghs": [
                "02"
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        },
        "heat": {
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                "value": 17,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000106,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/1/19/Yttrium_sublimed_dendritic_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Yttrium_sublimed_dendritic_and_1cm3_cube.jpg\">Alchemist-hp (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
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                12.2236,
                20.52441,
                60.6072,
                75.35
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        },
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            "unit": "cm[3]·mol[−1]",
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                    "unit": "K"
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            ]
        },
        "molar_volume": {
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            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Yttrium",
            "de": "Yttrium",
            "la": "Yttrium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.22,
            "sanderson": 0.65,
            "allred": 1.11,
            "ghosh_gupta": {
                "value": 2.7237,
                "unit": "eV"
            },
            "nagle": 1.11,
            "pearson": {
                "value": 3.19,
                "unit": "eV"
            }
        },
        "number": 39,
        "oxidation_state": "+3",
        "oxide_character": "basic",
        "period": 5,
        "phase": "solid",
        "price": {
            "value": 31,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "mononuclidic",
            "stable",
            "light",
            "rare"
        ],
        "radius": {
            "empirical": {
                "value": 180,
                "unit": "pm"
            },
            "calculated": {
                "value": 212,
                "unit": "pm"
            },
            "covalent": {
                "value": 190,
                "deviation": 7,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            9,
            2
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        "sound_speed": {
            "value": 3300,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 88.905838,
            "deviation": 0.000002
        },
        "standard_potential": {
            "value": -2.37,
            "unit": "V",
            "info": "Y[3+] + 3e[-] → Y"
        },
        "superconductivity": "special",
        "symbol": "Y",
        "temperature": {
            "melting": {
                "value": 1799,
                "unit": "K"
            },
            "boiling": {
                "value": 3203,
                "unit": "K"
            },
            "liquid": {
                "value": 1404,
                "unit": "K"
            },
            "transition": {
                "value": 2.8,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Yttrium",
            "de": "Yttrium"
        }
    },
    "zr": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 50,
                "unit": "ppb"
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            "sun": {
                "value": 40,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 6700,
                "unit": "ppb"
            },
            "crust": {
                "value": 130000,
                "unit": "ppb"
            },
            "water": {
                "value": 0.026,
                "unit": "ppb"
            },
            "stream": {
                "value": 3,
                "unit": "ppb"
            },
            "human": {
                "value": 50,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white",
            "de": "silbrig weiß"
        },
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            "unit": "u"
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        "basicity": "amphoterism",
        "block": "d",
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            "eg": [
                {
                    "value": "231-176-9"
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            ],
            "echa": [
                {
                    "value": "100.028.342"
                }
            ]
        },
        "column": 18,
        "crystal_structure": "hcp",
        "density": {
            "value": 6.501,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Klaproth",
            "value": 1789
        },
        "elastic": {
            "young": {
                "value": 68,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 33,
                "unit": "GPa"
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            "poisson": 0.34
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        "electrical": {
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                "value": 2360000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 4.33e-7,
                "unit": "Ωm"
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        },
        "electron_config": "Kr 4d[2] 5s[2]",
        "enthalpy": {
            "fusion": {
                "value": 21,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 580,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 605,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "lithophile",
        "group": 4,
        "hardness": {
            "mohs": 5,
            "brinell": {
                "value": 650,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 903,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "250",
                "260"
            ],
            "p": [
                "222",
                "223",
                "231+232",
                "370+378​"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ],
            "nfpa": {
                "h": "0",
                "f": "1",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 270,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 22.7,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000057,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/9/92/Zirconium_crystal_bar_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Zirconium_crystal_bar_and_1cm3_cube.jpg\">Alchemist-hp (pse-mendelejew.de).</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.634126,
                13.13,
                23.17,
                34.41836,
                80.348
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
            "value": 0.00001402,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Zirconium",
            "de": "Zirconium",
            "la": "Zirconium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.33,
            "sanderson": 0.9,
            "allred": 1.22,
            "ghosh_gupta": {
                "value": 2.8489,
                "unit": "eV"
            },
            "nagle": 1.17,
            "pearson": {
                "value": 3.64,
                "unit": "eV"
            }
        },
        "number": 40,
        "oxidation_state": "4, 2",
        "oxide_character": "amphoteric",
        "period": 5,
        "phase": "solid",
        "price": {
            "value": 36.4,
            "deviation": 0.7,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "heavy",
            "refractory"
        ],
        "radius": {
            "empirical": {
                "value": 160,
                "unit": "pm"
            },
            "calculated": {
                "value": 206,
                "unit": "pm"
            },
            "covalent": {
                "value": 175,
                "deviation": 7,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            10,
            2
        ],
        "sound_speed": {
            "value": 3800,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 91.224,
            "deviation": 0.002
        },
        "standard_potential": {
            "value": -1.553,
            "unit": "V",
            "info": "ZrO{2} + 4H[+] + 4e[-] → Zr + 2H{2}O"
        },
        "superconductivity": "normal",
        "symbol": "Zr",
        "temperature": {
            "melting": {
                "value": 2125,
                "unit": "K"
            },
            "boiling": {
                "value": 4650,
                "unit": "K"
            },
            "liquid": {
                "value": 2525,
                "unit": "K"
            },
            "transition": {
                "value": 0.6,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Zirconium",
            "de": "Zirconium"
        }
    },
    "nb": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 2,
                "unit": "ppb"
            },
            "sun": {
                "value": 4,
                "unit": "ppb"
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            "meteorite": {
                "value": 190,
                "unit": "ppb"
            },
            "crust": {
                "value": 17000,
                "unit": "ppb"
            },
            "water": {
                "value": 0.001,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "gray metallic, bluish when oxidized",
            "de": "grau metallisch glänzend"
        },
        "atomic_mass": {
            "value": 92.906372,
            "unit": "u"
        },
        "basicity": "slightly-acidic",
        "block": "d",
        "classification": {
            "cas": [
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                    "value": "7440-03-1"
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            ],
            "eg": [
                {
                    "value": "231-113-5"
                }
            ],
            "echa": [
                {
                    "value": "100.028.284"
                }
            ]
        },
        "column": 19,
        "crystal_structure": "bcc",
        "density": {
            "value": 8.57,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Hatchet",
            "value": 1801
        },
        "elastic": {
            "young": {
                "value": 105,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 38,
                "unit": "GPa"
            },
            "bulk": {
                "value": 170,
                "unit": "GPa"
            },
            "poisson": 0.4
        },
        "electrical": {
            "conductivity": {
                "value": 6580000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 1.52e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Kr 4d[4] 5s[1]",
        "enthalpy": {
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                "value": 26.8,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 690,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 733,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
        "group": 5,
        "hardness": {
            "mohs": 6,
            "brinell": {
                "value": 736,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 1320,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228"
            ],
            "p": [
                "210"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ],
            "nfpa": {
                "h": "0",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "thermal_conductivity": {
                "value": 54,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000073,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/f/f2/Niobium_crystals_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Niobium_crystals_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a> (FAL or <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>), via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.75885,
                14.32,
                25.04,
                37.611,
                50.5728
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
            "value": 0.00001083,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Niobium",
            "de": "Niob",
            "la": "Niobium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.6,
            "sanderson": 1.42,
            "allred": 1.23,
            "ghosh_gupta": {
                "value": 2.974,
                "unit": "eV"
            },
            "nagle": 1.21,
            "pearson": {
                "value": 4,
                "unit": "eV"
            }
        },
        "number": 41,
        "oxidation_state": "2, 4, '''5'''",
        "oxide_character": "amphoteric",
        "period": 5,
        "phase": "solid",
        "price": {
            "value": 73.5,
            "deviation": 12.1,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "mononuclidic",
            "stable",
            "heavy",
            "refractory"
        ],
        "radius": {
            "empirical": {
                "value": 146,
                "unit": "pm"
            },
            "calculated": {
                "value": 198,
                "unit": "pm"
            },
            "covalent": {
                "value": 164,
                "deviation": 6,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            12,
            1
        ],
        "sound_speed": {
            "value": 3480,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 92.90637,
            "deviation": 0.00001
        },
        "standard_potential": {
            "value": -1.1,
            "unit": "V",
            "info": "Nb[2+] + 2e[-] → Nb"
        },
        "superconductivity": "normal",
        "symbol": "Nb",
        "temperature": {
            "melting": {
                "value": 2750,
                "unit": "K"
            },
            "boiling": {
                "value": 5017,
                "unit": "K"
            },
            "liquid": {
                "value": 2267,
                "unit": "K"
            },
            "transition": {
                "value": 9.25,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Niobium",
            "de": "Niob"
        }
    },
    "mo": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 5,
                "unit": "ppb"
            },
            "sun": {
                "value": 9,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 1200,
                "unit": "ppb"
            },
            "crust": {
                "value": 1100,
                "unit": "ppb"
            },
            "water": {
                "value": 10,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.8,
                "unit": "ppb"
            },
            "human": {
                "value": 100,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "gray metallic",
            "de": "grau metallisch"
        },
        "atomic_mass": {
            "value": 95.951,
            "unit": "u"
        },
        "basicity": "strongly-acidic",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7439-98-7"
                }
            ],
            "eg": [
                {
                    "value": "231-107-2"
                }
            ],
            "echa": [
                {
                    "value": "100.028.279"
                }
            ]
        },
        "column": 20,
        "crystal_structure": "bcc",
        "density": {
            "value": 10.28,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Scheele",
            "value": 1778
        },
        "elastic": {
            "young": {
                "value": 329,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 20,
                "unit": "GPa"
            },
            "bulk": {
                "value": 230,
                "unit": "GPa"
            },
            "poisson": 0.31
        },
        "electrical": {
            "conductivity": {
                "value": 18200000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 5.5e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Kr 4d[5] 5s[1]",
        "enthalpy": {
            "fusion": {
                "value": 36,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 600,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 659,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "siderophile",
        "group": 6,
        "hardness": {
            "mohs": 5.5,
            "brinell": {
                "value": 1500,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 1530,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 139,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000048,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/3/32/Molybdenum_crystaline_fragment_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Molybdenum_crystaline_fragment_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a> (FAL or <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>), via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                7.09243,
                16.16,
                27.13,
                40.33,
                54.417
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.000089,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00000938,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Molybdenum",
            "de": "Molybdän",
            "la": "Molybdenum"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.16,
            "sanderson": 1.15,
            "allred": 1.3,
            "ghosh_gupta": {
                "value": 3.0992,
                "unit": "eV"
            },
            "nagle": 1.26,
            "pearson": {
                "value": 3.9,
                "unit": "eV"
            }
        },
        "number": 42,
        "optical": {
            "reflectivity": {
                "value": 58,
                "unit": "%"
            }
        },
        "oxidation_state": "2, 3, 4, 5, '''6'''",
        "oxide_character": "amphoteric",
        "period": 5,
        "phase": "solid",
        "price": {
            "value": 40.1,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "vital",
            "stable",
            "heavy",
            "refractory"
        ],
        "radius": {
            "empirical": {
                "value": 139,
                "unit": "pm"
            },
            "calculated": {
                "value": 190,
                "unit": "pm"
            },
            "covalent": {
                "value": 154,
                "deviation": 5,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            13,
            1
        ],
        "sound_speed": {
            "value": 6190,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 95.95,
            "deviation": 0.01
        },
        "standard_potential": {
            "value": -0.152,
            "unit": "V",
            "info": "MoO{2} + 4e[-] + 4H[+] → Mo + 2H{2}O"
        },
        "superconductivity": "normal",
        "symbol": "Mo",
        "temperature": {
            "melting": {
                "value": 2896,
                "unit": "K"
            },
            "boiling": {
                "value": 4912,
                "unit": "K"
            },
            "liquid": {
                "value": 2016,
                "unit": "K"
            },
            "transition": {
                "value": 0.92,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Molybdenum",
            "de": "Molybdän"
        }
    },
    "tc": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "appearance": {
            "en": "shiny gray metal",
            "de": "silbrig grau metallisch"
        },
        "atomic_mass": {
            "value": 98.9063,
            "*": true,
            "unit": "u"
        },
        "basicity": "strongly-acidic",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7440-26-8"
                }
            ],
            "eg": [
                {
                    "value": "231-136-0"
                }
            ],
            "echa": [
                {
                    "value": "100.028.305"
                }
            ]
        },
        "column": 21,
        "crystal_structure": "hcp",
        "density": {
            "value": 11.5,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Segrè",
            "value": 1937
        },
        "electrical": {
            "conductivity": {
                "value": 4540000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 2.2e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Kr 4d[5] 5s[2]",
        "enthalpy": {
            "fusion": {
                "value": 23,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 550,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 661,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "quantum",
        "goldschmidt": "synthetic",
        "group": 7,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 51,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/a/ab/Technetium-sample-cropped.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Technetium-sample-cropped.jpg\">GFDL</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\">CC BY-SA 4.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                7.11938,
                15.26,
                29.55,
                41,
                57
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.00027,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00000863,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Technetium",
            "de": "Technetium",
            "la": "Technetium"
        },
        "natural_occurrence": "decay",
        "negativity": {
            "pauling": 1.9,
            "allred": 1.36,
            "ghosh_gupta": {
                "value": 3.2244,
                "unit": "eV"
            },
            "nagle": 1.3
        },
        "number": 43,
        "oxidation_state": "-3 … 7",
        "oxide_character": "acidic",
        "period": 5,
        "phase": "solid",
        "price": {
            "value": 100000,
            "unit": "USD"
        },
        "properties": [
            "heavy",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "slightly-radioactive",
        "radius": {
            "empirical": {
                "value": 136,
                "unit": "pm"
            },
            "calculated": {
                "value": 183,
                "unit": "pm"
            },
            "covalent": {
                "value": 147,
                "deviation": 7,
                "unit": "pm"
            },
            "vdw": {
                "value": 205,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            13,
            2
        ],
        "standard_potential": {
            "value": 0.272,
            "unit": "V",
            "info": "TcO{2} + 4e[-] + 4H[+] → Tc + 2H{2}O"
        },
        "superconductivity": "normal",
        "symbol": "Tc",
        "temperature": {
            "melting": {
                "value": 2430,
                "unit": "K"
            },
            "boiling": {
                "value": 4538,
                "unit": "K"
            },
            "liquid": {
                "value": 2108,
                "unit": "K"
            },
            "transition": {
                "value": 8.2,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Technetium",
            "de": "Technetium"
        }
    },
    "ru": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 4,
                "unit": "ppb"
            },
            "sun": {
                "value": 5,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 830,
                "unit": "ppb"
            },
            "crust": {
                "value": 1,
                "unit": "ppb"
            },
            "water": {
                "value": 0.0007,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white metallic",
            "de": "silbrig weiß metallisch"
        },
        "atomic_mass": {
            "value": 101.072,
            "unit": "u"
        },
        "basicity": "slightly-acidic",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7440-18-8"
                }
            ],
            "eg": [
                {
                    "value": "231-127-1"
                }
            ],
            "echa": [
                {
                    "value": "100.028.297"
                }
            ]
        },
        "column": 22,
        "crystal_structure": "hcp",
        "density": {
            "value": 12.37,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Claus",
            "value": 1844
        },
        "elastic": {
            "young": {
                "value": 447,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 173,
                "unit": "GPa"
            },
            "bulk": {
                "value": 220,
                "unit": "GPa"
            },
            "poisson": 0.3
        },
        "electrical": {
            "conductivity": {
                "value": 14100000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 7.1e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Kr 4d[7] 5s[1]",
        "enthalpy": {
            "fusion": {
                "value": 25.7,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 580,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 652,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "siderophile",
        "group": 8,
        "hardness": {
            "mohs": 6.5,
            "brinell": {
                "value": 2160,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228"
            ],
            "p": [
                "210"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ]
        },
        "heat": {
            "thermal_conductivity": {
                "value": 120,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000064,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/2/2c/Ruthenium_a_half_bar.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Ruthenium_a_half_bar.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a> (FAL or <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>), via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                7.3605,
                16.76,
                28.47,
                45,
                59
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.000039,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00000817,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Ruthenium",
            "de": "Ruthenium",
            "la": "Ruthenium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.2,
            "allred": 1.42,
            "ghosh_gupta": {
                "value": 3.336,
                "unit": "eV"
            },
            "nagle": 1.35,
            "pearson": {
                "value": 4.5,
                "unit": "eV"
            }
        },
        "number": 44,
        "oxidation_state": "2, 3, '''4''', 6, 8",
        "oxide_character": "basic",
        "period": 5,
        "phase": "solid",
        "price": {
            "value": 10500,
            "deviation": 100,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "stable",
            "noble",
            "heavy",
            "platinum"
        ],
        "radius": {
            "empirical": {
                "value": 134,
                "unit": "pm"
            },
            "calculated": {
                "value": 178,
                "unit": "pm"
            },
            "covalent": {
                "value": 146,
                "deviation": 7,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            15,
            1
        ],
        "sound_speed": {
            "value": 5970,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 101.07,
            "deviation": 0.02
        },
        "superconductivity": "normal",
        "symbol": "Ru",
        "temperature": {
            "melting": {
                "value": 2607,
                "unit": "K"
            },
            "boiling": {
                "value": 4423,
                "unit": "K"
            },
            "liquid": {
                "value": 1816,
                "unit": "K"
            },
            "transition": {
                "value": 0.5,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Ruthenium",
            "de": "Ruthenium"
        }
    },
    "rh": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 0.6,
                "unit": "ppb"
            },
            "sun": {
                "value": 2,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 180,
                "unit": "ppb"
            },
            "crust": {
                "value": 0.7,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white metallic",
            "de": "silbrig weiß metallisch"
        },
        "atomic_mass": {
            "value": 102.905502,
            "unit": "u"
        },
        "basicity": "amphoterism",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7440-16-6"
                }
            ],
            "eg": [
                {
                    "value": "231-125-0"
                }
            ],
            "echa": [
                {
                    "value": "100.028.295"
                }
            ]
        },
        "column": 23,
        "crystal_structure": "fcc",
        "density": {
            "value": 12.38,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Wollaston",
            "value": 1803
        },
        "elastic": {
            "young": {
                "value": 275,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 150,
                "unit": "GPa"
            },
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            "hazard": [
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            "nfpa": {
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                "i": "0",
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        },
        "heat": {
            "heat_capacity": {
                "value": 243,
                "unit": "J·kg[−1]·K[−1]"
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            "thermal_expansion": {
                "value": 0.0000082,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/9/98/Rhodium_powder_pressed_melted.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Rhodium_powder_pressed_melted.jpg\">Alchemist-hp (talk) www.pse-mendelejew.dederivative work: Purpy Pupple</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0/de/deed.en\">CC BY-SA 3.0 DE</a>, via Wikimedia Commons"
        },
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                18.08,
                31.06,
                42,
                63
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                "unit": "pm"
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                "value": 173,
                "unit": "pm"
            },
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                "unit": "pm"
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        },
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            8,
            18,
            16,
            1
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            ]
        },
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            "unit": "V",
            "info": "Rh[3+] + 3e[-] → Rh"
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        "superconductivity": "normal",
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                "value": 2237,
                "unit": "K"
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                "value": 3968,
                "unit": "K"
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            "liquid": {
                "value": 1731,
                "unit": "K"
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            "transition": {
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            "en": "Rhodium",
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                "363",
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            "ghs": [
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            "nfpa": {
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                "s": ""
            }
        },
        "heat": {
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            "thermal_expansion": {
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                "unit": "K[-1]"
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        },
        "image": {
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            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Palladium_crystals.jpg\">Hi-Res Images ofChemical Elements</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
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                19.43,
                32.93,
                46,
                61
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                    "unit": "K"
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            "la": "Palladium"
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                "unit": "eV"
            },
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            "pearson": {
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        },
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        },
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        },
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            "platinum"
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                "unit": "pm"
            },
            "calculated": {
                "value": 169,
                "unit": "pm"
            },
            "covalent": {
                "value": 139,
                "deviation": 6,
                "unit": "pm"
            },
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                "value": 163,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
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            2,
            8,
            18,
            18
        ],
        "sound_speed": {
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            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
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            "deviation": 0.01
        },
        "standard_potential": {
            "value": 0.915,
            "unit": "V",
            "info": "Pd[2+] + 2e[-] → Pd"
        },
        "superconductivity": "special",
        "symbol": "Pd",
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                "value": 1828.05,
                "unit": "K"
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                "value": 3236,
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            "en": "Palladium",
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        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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            }
        },
        "appearance": {
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                    "value": "7440-22-4"
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                {
                    "value": "100.028.301"
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                {
                    "value": "D08AL30"
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                "value": 83,
                "unit": "GPa"
            },
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                "value": 30,
                "unit": "GPa"
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                "value": 100,
                "unit": "GPa"
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            "poisson": 0.37
        },
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                "value": 61400000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 1.63e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Kr 4d[10] 5s[1]",
        "enthalpy": {
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                "value": 11.3,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 255,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 285,
                "unit": "kJ·mol[-1]"
            }
        },
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                "value": 24.5,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 251,
                "unit": "NM·m[-2]"
            }
        },
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            "p": [
                "273",
                "391",
                "501"
            ],
            "hazard": [
                "N"
            ],
            "ghs": [
                "09"
            ],
            "nfpa": {
                "h": "0",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
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                "value": 235,
                "unit": "J·kg[−1]·K[−1]",
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                        "unit": "K"
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                ]
            },
            "thermal_conductivity": {
                "value": 430,
                "unit": "W·m[-1]·K[-1]"
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            "thermal_expansion": {
                "value": 0.0000189,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 4.26,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/5/55/Silver_crystal.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Silver_crystal.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0/de/deed.en\">CC BY-SA 3.0 DE</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
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                21.4844,
                34.8,
                49,
                65
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            "unit": "eV"
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        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
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        "molar_volume": {
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            "mulliken": 1.47,
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                "value": 3.6842,
                "unit": "eV"
            },
            "nagle": 1.45,
            "pearson": {
                "value": 4.44,
                "unit": "eV"
            }
        },
        "number": 47,
        "optical": {
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                "value": 97,
                "unit": "%"
            }
        },
        "oxidation_state": "'''+1''', +2, +3",
        "oxide_character": "basic",
        "period": 5,
        "phase": "solid",
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        },
        "properties": [
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        "radius": {
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                "unit": "pm"
            },
            "calculated": {
                "value": 165,
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            },
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            },
            "vdw": {
                "value": 172,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
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            2,
            8,
            18,
            18,
            1
        ],
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            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
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        },
        "standard_potential": {
            "value": 0.7991,
            "unit": "V",
            "info": "Ag[+] + e[-] → Ag"
        },
        "superconductivity": "none",
        "symbol": "Ag",
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                "value": 1234.93,
                "unit": "K"
            },
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                "value": 2435,
                "unit": "K"
            },
            "liquid": {
                "value": 1200.07,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LC{50}",
                "organism": "fish",
                "application": "#",
                "time": 345600,
                "value": {
                    "value": null,
                    "range": [
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                        58
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                    "unit": "mg·l[-1]"
                }
            },
            {
                "type": "LC{50}",
                "organism": "crayfish",
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                        4.5
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                    "unit": "mg·l[-1]"
                }
            },
            {
                "type": "EC{50}",
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                        0.0095
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                }
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            {
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                        0.00234
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                    "unit": "mg·l[-1]"
                }
            }
        ],
        "wiki": {
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            "de": "Silber"
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    },
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        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "unit": "ppb"
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                "value": 150,
                "unit": "ppb"
            },
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                "value": 0.05,
                "unit": "ppb"
            },
            "stream": {
                "value": 700,
                "unit": "ppb"
            }
        },
        "appearance": {
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                    "unit": "K"
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        "elastic": {
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                "unit": "GPa"
            },
            "rigidity": {
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                "unit": "GPa"
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                "unit": "GPa"
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            "poisson": 0.3
        },
        "electrical": {
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                "value": 14300000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 7e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Kr 4d[10] 5s[2]",
        "enthalpy": {
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                "value": 6.3,
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            },
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                "value": 100,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
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                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "chalcophile",
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        "hardness": {
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                "value": 203,
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        "hazard": {
            "h": [
                "250",
                "350",
                "330",
                "361fd",
                "341",
                "372",
                "410"
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            "p": [
                "210",
                "260",
                "273",
                "280",
                "308+313",
                "391",
                "405",
                "501"
            ],
            "hazard": [
                "F",
                "T",
                "X",
                "N"
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            "ghs": [
                "02",
                "06",
                "08",
                "09"
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            "adr": [
                "6.1",
                "9"
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            "nfpa": {
                "h": "4",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "thermal_conductivity": {
                "value": 97,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000308,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 4.2,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/b/b5/Cadmium-crystal_bar.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Cadmium-crystal_bar.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a> (FAL or <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>), via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                8.99382,
                16.908313,
                37.468,
                51,
                67.9
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            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000198,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "value": 0.000013,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Cadmium",
            "de": "Cadmium",
            "la": "Cadmium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.69,
            "sanderson": 1.98,
            "allred": 1.46,
            "mulliken": 1.53,
            "ghosh_gupta": {
                "value": 3.7958,
                "unit": "eV"
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            "nagle": 1.45,
            "pearson": {
                "value": 4.33,
                "unit": "eV"
            }
        },
        "number": 48,
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                "value": 67,
                "unit": "%"
            }
        },
        "oxidation_state": "2",
        "oxide_character": "basic",
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            "value": 2.73,
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            "heavy"
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                "value": 151,
                "unit": "pm"
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                "value": 161,
                "unit": "pm"
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            "covalent": {
                "value": 144,
                "deviation": 9,
                "unit": "pm"
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            "vdw": {
                "value": 158,
                "unit": "pm"
            }
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        "set": "transitionmetal",
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            8,
            18,
            18,
            2
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        "sound_speed": {
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            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
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            ]
        },
        "standard_atomic_weight": {
            "value": 112.414,
            "deviation": 0.004
        },
        "standard_potential": {
            "value": -0.403,
            "unit": "V",
            "info": "Cd[2+] + 2e[-] → Cd"
        },
        "superconductivity": "normal",
        "symbol": "Cd",
        "temperature": {
            "melting": {
                "value": 594.22,
                "unit": "K"
            },
            "boiling": {
                "value": 1040,
                "unit": "K"
            },
            "liquid": {
                "value": 445.78,
                "unit": "K"
            },
            "transition": {
                "value": 0.52,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LD{50}",
                "organism": "rats",
                "application": "oral",
                "value": {
                    "value": 2330,
                    "unit": "mg·kg[-1]"
                }
            },
            {
                "type": "LC{50}",
                "organism": "fish",
                "application": "#",
                "time": 345600,
                "value": {
                    "value": null,
                    "range": [
                        0.001,
                        45
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                    "unit": "mg·l[-1]"
                }
            },
            {
                "type": "LC{50}",
                "organism": "crayfish",
                "application": "#",
                "time": 172800,
                "value": {
                    "value": null,
                    "range": [
                        0.000072,
                        4
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                    "unit": "mg·l[-1]"
                }
            },
            {
                "type": "EC{50}",
                "organism": "crayfish",
                "application": "#",
                "time": 172800,
                "value": {
                    "value": 0.58,
                    "unit": "mg·l[-1]"
                }
            },
            {
                "type": "EC{50}",
                "organism": "algae",
                "application": "#",
                "time": 345600,
                "value": {
                    "value": null,
                    "range": [
                        0.097,
                        0.452
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                    "unit": "mg·l[-1]"
                }
            }
        ],
        "wiki": {
            "en": "Cadmium",
            "de": "Cadmium"
        }
    },
    "in": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 0.3,
                "unit": "ppb"
            },
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                "unit": "ppb"
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            "meteorite": {
                "value": 45,
                "unit": "ppb"
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                "value": 160,
                "unit": "ppb"
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            "water": {
                "value": 0.0001,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery lustrous gray",
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        },
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                {
                    "value": "7440-74-6"
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                {
                    "value": "231-180-0"
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            "echa": [
                {
                    "value": "100.028.345"
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            ]
        },
        "column": 27,
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            "value": 7.31,
            "unit": "g·cm[−3]"
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        "discovery": {
            "by": "Reich, Richter",
            "value": 1863
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        "elastic": {
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                "value": 11,
                "unit": "GPa"
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        },
        "electrical": {
            "conductivity": {
                "value": 12500000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 8e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Kr 4d[10] 5s[2] 5p[1]",
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                "value": 3.26,
                "unit": "kJ·mol[-1]"
            },
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                "value": 230,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 243,
                "unit": "kJ·mol[-1]"
            }
        },
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                "unit": "NM·m[-2]"
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        },
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                "210",
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                "280",
                "240",
                "370+378"
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                "F"
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                "02"
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            "nfpa": {
                "h": "2",
                "f": "0",
                "i": "0",
                "s": ""
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        },
        "heat": {
            "heat_capacity": {
                "value": 233,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 81.6,
                "unit": "W·m[-1]·K[-1]"
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            "thermal_expansion": {
                "value": 0.0000321,
                "unit": "K[-1]"
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        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/d/d4/Indium_wetting_glass.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Indium_wetting_glass.jpg\">Schtone</a>, Public domain, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                5.7863556,
                18.87041,
                28.04415,
                55.45,
                69.3
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            ]
        },
        "molar_volume": {
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        },
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        "natural_occurrence": "primordial",
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                "value": 4.253,
                "unit": "eV"
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                "value": 3.1,
                "unit": "eV"
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        },
        "number": 49,
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        },
        "properties": [
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            "heavy"
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        "radius": {
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                "value": 167,
                "unit": "pm"
            },
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                "value": 156,
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            "covalent": {
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                "unit": "pm"
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            "vdw": {
                "value": 193,
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            18,
            3
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                {
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            ]
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            "unit": "V",
            "info": "In[3+] + 3e[-] → In"
        },
        "superconductivity": "normal",
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                "value": 429.7485,
                "unit": "K"
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                "value": 2345,
                "unit": "K"
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            "liquid": {
                "value": 1915.2515,
                "unit": "K"
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            "triple": {
                "value": 429.7445,
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                "@": {
                    "value": 1,
                    "unit": "kPa"
                }
            },
            "transition": {
                "value": 3.4,
                "unit": "K"
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        },
        "wiki": {
            "en": "Indium",
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    },
    "sn": {
        "@modified": "2023-11-04T10:30:10.482Z",
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                "value": 1200,
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            "crust": {
                "value": 2200,
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                "value": 200,
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                {
                    "value": "100.028.310"
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                ]
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            {
                "label": "_β",
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                "condition": [
                    {
                        "value": 293.15,
                        "unit": "K"
                    }
                ]
            }
        ],
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                "unit": "GPa"
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                "unit": "GPa"
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                "value": 58,
                "unit": "GPa"
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            "poisson": 0.36
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        "electrical": {
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                "value": 8690000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 1.15e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Kr 4d[10] 5s[2] 5p[2]",
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                "value": 7,
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            },
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                "value": 290,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 302,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "antiquity",
        "goldschmidt": "chalcophile",
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        "hardness": {
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            "brinell": {
                "value": 51,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": null,
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                "value": 67,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.000022,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 4.42,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/6/6a/Tin-2.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Tin-2.jpg\">Jurii</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
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                14.63307,
                30.506,
                40.74,
                77.03
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            "unit": "eV"
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        "magnetic_ordering": "paramagnetic",
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                    "unit": "K"
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            ]
        },
        "molar_volume": {
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        "natural_occurrence": "primordial",
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            "allred": 1.72,
            "mulliken": 2.21,
            "allen": 1.824,
            "ghosh_gupta": {
                "value": 4.672,
                "unit": "eV"
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            "nagle": 1.7,
            "pearson": {
                "value": 4.3,
                "unit": "eV"
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        },
        "number": 50,
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                "value": 54,
                "unit": "%"
            }
        },
        "oxidation_state": "(-4), '''4''', 2",
        "oxide_character": "amphoteric",
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        "properties": [
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        "radius": {
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                "value": 140,
                "unit": "pm"
            },
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                "unit": "pm"
            },
            "covalent": {
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                "deviation": 4,
                "unit": "pm"
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            "vdw": {
                "value": 217,
                "unit": "pm"
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        },
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            18,
            18,
            4
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        "sound_speed": {
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            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
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            ]
        },
        "standard_atomic_weight": {
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        "standard_potential": {
            "value": -0.137,
            "unit": "V",
            "info": "Sn[2+] + 2e[-] → Sn"
        },
        "superconductivity": "normal",
        "symbol": "Sn",
        "temperature": {
            "melting": {
                "value": 505.08,
                "unit": "K"
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            "boiling": {
                "value": 2875,
                "unit": "K"
            },
            "liquid": {
                "value": 2369.92,
                "unit": "K"
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            "transition": {
                "value": 3.7,
                "unit": "K"
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        },
        "wiki": {
            "en": "Tin",
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    },
    "sb": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "unit": "ppb"
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            "meteorite": {
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            "crust": {
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            "water": {
                "value": 0.2,
                "unit": "ppb"
            },
            "stream": {
                "value": 2,
                "unit": "ppb"
            }
        },
        "appearance": {
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        },
        "atomic_mass": {
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        "basicity": "slightly-acidic",
        "block": "p",
        "classification": {
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            "eg": [
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            ],
            "echa": [
                {
                    "value": "100.028.314"
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            ]
        },
        "column": 29,
        "crystal_structure": "rho",
        "density": {
            "value": 6.697,
            "unit": "g·cm[−3]"
        },
        "elastic": {
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                "value": 55,
                "unit": "GPa"
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            "rigidity": {
                "value": 20,
                "unit": "GPa"
            },
            "bulk": {
                "value": 42,
                "unit": "GPa"
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        },
        "electrical": {
            "conductivity": {
                "value": 2500000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 4e-7,
                "unit": "Ωm"
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        },
        "electron_config": "Kr 4d[10] 5s[2] 5p[3]",
        "enthalpy": {
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                "value": 19.7,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 68,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 262,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "antiquity",
        "goldschmidt": "chalcophile",
        "group": 15,
        "hardness": {
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            "brinell": {
                "value": 294,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "351"
            ],
            "p": [
                "201",
                "202",
                "308+313"
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            "hazard": [
                "X"
            ],
            "ghs": [
                "08"
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            "adr": [
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        },
        "heat": {
            "thermal_conductivity": {
                "value": 24,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.000011,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/5/5c/Antimony-4.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Antimony-4.jpg\">http://images-of-elements.com/</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
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                16.626,
                25.3235,
                43.804,
                55
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.000099,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "value": 0.00001819,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Antimony",
            "de": "Antimon",
            "la": "Stibium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.05,
            "sanderson": 2.46,
            "allred": 1.82,
            "mulliken": 2.12,
            "allen": 1.984,
            "ghosh_gupta": {
                "value": 5.0203,
                "unit": "eV"
            },
            "nagle": 1.88,
            "pearson": {
                "value": 4.85,
                "unit": "eV"
            }
        },
        "number": 51,
        "optical": {
            "reflectivity": {
                "value": 55,
                "unit": "%"
            }
        },
        "oxidation_state": "-3, '''3''', 5",
        "oxide_character": "amphoteric",
        "period": 5,
        "phase": "solid",
        "price": {
            "value": 5.79,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "stable",
            "heavy"
        ],
        "radius": {
            "empirical": {
                "value": 140,
                "unit": "pm"
            },
            "calculated": {
                "value": 133,
                "unit": "pm"
            },
            "covalent": {
                "value": 139,
                "deviation": 5,
                "unit": "pm"
            },
            "vdw": {
                "value": 206,
                "unit": "pm"
            }
        },
        "set": "metalloid",
        "shell": [
            2,
            8,
            18,
            18,
            5
        ],
        "sound_speed": {
            "value": 3420,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 121.76,
            "deviation": 0.001
        },
        "standard_potential": {
            "value": 0.15,
            "unit": "V",
            "info": "Sb[3+] + 3e[-] → Sb"
        },
        "superconductivity": "special",
        "symbol": "Sb",
        "temperature": {
            "melting": {
                "value": 903.78,
                "unit": "K"
            },
            "boiling": {
                "value": 1908,
                "unit": "K"
            },
            "liquid": {
                "value": 1004.22,
                "unit": "K"
            },
            "transition": {
                "value": 3.6,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Antimony",
            "de": "Antimon"
        }
    },
    "te": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 9,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 2100,
                "unit": "ppb"
            },
            "crust": {
                "value": 1,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery lustrous gray (crystalline); brown-black powder (amorphous)",
            "de": "silberweiß, metallisch glänzend"
        },
        "atomic_mass": {
            "value": 127.603,
            "unit": "u"
        },
        "basicity": "slightly-acidic",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "13494-80-9"
                }
            ],
            "eg": [
                {
                    "value": "236-813-4"
                }
            ],
            "echa": [
                {
                    "value": "100.033.452"
                }
            ]
        },
        "column": 30,
        "crystal_structure": "hex",
        "density": {
            "value": 6.24,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "von Reichenstein",
            "value": 1782
        },
        "elastic": {
            "young": {
                "value": 43,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 16,
                "unit": "GPa"
            },
            "bulk": {
                "value": 65,
                "unit": "GPa"
            }
        },
        "electrical": {
            "conductivity": {
                "value": 10000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 0.001,
                "unit": "Ωm"
            }
        },
        "electron_config": "Kr 4d[10] 5s[2] 5p[4]",
        "enthalpy": {
            "fusion": {
                "value": 17.5,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 48,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 197,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "chalcophile",
        "group": 16,
        "hardness": {
            "mohs": 2.25,
            "brinell": {
                "value": 180,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "332",
                "317",
                "360",
                "362",
                "413"
            ],
            "p": [
                "202",
                "273",
                "280",
                "302+352",
                "304+340+312",
                "308+313"
            ],
            "hazard": [
                "X"
            ],
            "ghs": [
                "07",
                "08"
            ],
            "nfpa": {
                "h": "2",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "thermal_conductivity": {
                "value": 3,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/c/c1/Tellurium2.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Tellurium2.jpg\">http://images-of-elements.com/tellurium.php</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                9.009808,
                18.6,
                27.84,
                37.4155,
                59.3,
                69.1
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000395,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00002046,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Tellurium",
            "de": "Tellur",
            "la": "Tellurium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.1,
            "sanderson": 2.62,
            "allred": 2.01,
            "mulliken": 2.41,
            "allen": 2.158,
            "ghosh_gupta": {
                "value": 5.325,
                "unit": "eV"
            },
            "nagle": 2.08,
            "pearson": {
                "value": 5.49,
                "unit": "eV"
            }
        },
        "number": 52,
        "optical": {
            "reflectivity": {
                "value": 50,
                "unit": "%"
            },
            "refractive_index": 1.000991
        },
        "oxidation_state": "'''-2''', (±1), 2, '''4''', 6",
        "oxide_character": "acidic",
        "period": 5,
        "phase": "solid",
        "price": {
            "value": 63.5,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "stable",
            "semiconductor",
            "heavy"
        ],
        "radius": {
            "empirical": {
                "value": 140,
                "unit": "pm"
            },
            "calculated": {
                "value": 123,
                "unit": "pm"
            },
            "covalent": {
                "value": 138,
                "deviation": 4,
                "unit": "pm"
            },
            "vdw": {
                "value": 206,
                "unit": "pm"
            }
        },
        "set": "metalloid",
        "shell": [
            2,
            8,
            18,
            18,
            6
        ],
        "sound_speed": {
            "value": 2610,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 127.6,
            "deviation": 0.03
        },
        "standard_potential": {
            "value": -1.143,
            "unit": "V",
            "info": "Te + 2e[-] → Te[2-]"
        },
        "superconductivity": "special",
        "symbol": "Te",
        "temperature": {
            "melting": {
                "value": 722.66,
                "unit": "K"
            },
            "boiling": {
                "value": 1261,
                "unit": "K"
            },
            "liquid": {
                "value": 538.34,
                "unit": "K"
            },
            "transition": {
                "value": 7.4,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Tellurium",
            "de": "Tellur"
        }
    },
    "i": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 1,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 260,
                "unit": "ppb"
            },
            "crust": {
                "value": 490,
                "unit": "ppb"
            },
            "water": {
                "value": 60,
                "unit": "ppb"
            },
            "stream": {
                "value": 5,
                "unit": "ppb"
            },
            "human": {
                "value": 200,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "lustrous metallic gray (solid); black/violet (liquid); violet (gas)",
            "de": "dunkel-violett (gasförmig); grauschwarz, glänzend (fest)"
        },
        "atomic_mass": {
            "value": 126.904473,
            "unit": "u"
        },
        "basicity": "strongly-acidic",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7553-56-2"
                }
            ],
            "eg": [
                {
                    "value": "231-442-4"
                }
            ],
            "echa": [
                {
                    "value": "100.028.585"
                }
            ],
            "atc": [
                {
                    "value": "D08AG03"
                },
                {
                    "value": "H03CA"
                },
                {
                    "value": "V09AB",
                    "label": "[123]I"
                },
                {
                    "value": "V09GB",
                    "label": "[125]I"
                },
                {
                    "value": "V09XA",
                    "label": "[131]I"
                },
                {
                    "value": "V10XA",
                    "label": "[131]I"
                }
            ]
        },
        "column": 31,
        "crystal_structure": "orth",
        "density": {
            "value": 4.94,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Courtois",
            "value": 1811
        },
        "elastic": {
            "bulk": {
                "value": 7.7,
                "unit": "GPa"
            }
        },
        "electrical": {
            "resistivity": {
                "value": 100000000,
                "unit": "Ωm"
            }
        },
        "electron_config": "Kr 4d[10] 5s[2] 5p[5]",
        "enthalpy": {
            "fusion": {
                "value": 7.76,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 20.9,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 107,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
        "group": 17,
        "hazard": {
            "h": [
                "312+332",
                "315",
                "319",
                "335",
                "372",
                "400"
            ],
            "p": [
                "273",
                "302+352",
                "305+351+338",
                "314"
            ],
            "hazard": [
                "X",
                "N"
            ],
            "ghs": [
                "07",
                "08",
                "09"
            ],
            "adr": [
                "6.1",
                "8"
            ],
            "nfpa": {
                "h": "3",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "thermal_conductivity": {
                "value": 0.449,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/0/0a/Sample_of_iodine.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Sample_of_iodine.jpg\">LHcheM</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\">CC BY-SA 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                10.45126,
                19.13126,
                29.57,
                40.357,
                51.52,
                74.4,
                87.61
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000887,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00002572,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Iodine",
            "de": "Iod",
            "la": "Iodum"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.66,
            "sanderson": 2.78,
            "allred": 2.21,
            "mulliken": 2.74,
            "allen": 2.359,
            "ghosh_gupta": {
                "value": 5.5916,
                "unit": "eV"
            },
            "nagle": 2.27,
            "pearson": {
                "value": 6.76,
                "unit": "eV"
            }
        },
        "number": 53,
        "oxidation_state": "±1, 3, 5, 7",
        "oxide_character": "acidic",
        "period": 5,
        "phase": "solid",
        "price": {
            "value": 35,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "vital",
            "mononuclidic",
            "stable"
        ],
        "radius": {
            "empirical": {
                "value": 140,
                "unit": "pm"
            },
            "calculated": {
                "value": 115,
                "unit": "pm"
            },
            "covalent": {
                "value": 139,
                "deviation": 3,
                "unit": "pm"
            },
            "vdw": {
                "value": 198,
                "unit": "pm"
            }
        },
        "set": "halogen",
        "shell": [
            2,
            8,
            18,
            18,
            7
        ],
        "standard_atomic_weight": {
            "value": 126.90447,
            "deviation": 0.00003
        },
        "standard_potential": {
            "value": 0.536,
            "unit": "V",
            "info": "I{2} + 2e[-] → 2I[-]"
        },
        "superconductivity": "special",
        "symbol": "I",
        "temperature": {
            "melting": {
                "value": 386.85,
                "unit": "K"
            },
            "boiling": {
                "value": 457.4,
                "unit": "K"
            },
            "liquid": {
                "value": 70.55,
                "unit": "K"
            },
            "triple": {
                "value": 386.65,
                "unit": "K",
                "@": {
                    "value": 12.1,
                    "unit": "kPa"
                }
            },
            "critical": {
                "value": 819,
                "unit": "K",
                "@": {
                    "value": 11.7,
                    "unit": "MPa"
                }
            },
            "transition": {
                "value": 1.2,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LD{50}",
                "organism": "rats",
                "application": "oral",
                "value": {
                    "value": 14000,
                    "unit": "mg·kg[-1]"
                }
            },
            {
                "type": "LC{50}",
                "organism": "fish",
                "application": "#",
                "time": 345600,
                "value": {
                    "value": null,
                    "range": [
                        0.53,
                        4.2
                    ],
                    "unit": "mg·l[-1]"
                }
            },
            {
                "type": "LC{50}",
                "organism": "crayfish",
                "application": "#",
                "time": 172800,
                "value": {
                    "value": null,
                    "range": [
                        0.16,
                        1.75
                    ],
                    "unit": "mg·l[-1]"
                }
            },
            {
                "type": "EC{50}",
                "organism": "crayfish",
                "application": "#",
                "time": 172800,
                "value": {
                    "value": 0.33,
                    "unit": "mg·l[-1]"
                }
            }
        ],
        "wiki": {
            "en": "Iodine",
            "de": "Iod"
        }
    },
    "xe": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 10,
                "unit": "ppb"
            },
            "crust": {
                "value": 0.02,
                "unit": "ppb"
            },
            "water": {
                "value": 0.005,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "colorless gas, exhibiting a blue glow when placed in an electric field",
            "de": "farbloses Gas"
        },
        "atomic_mass": {
            "value": 131.2936,
            "unit": "u"
        },
        "basicity": "slightly-acidic",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7440-63-3"
                }
            ],
            "eg": [
                {
                    "value": "231-172-7"
                }
            ],
            "echa": [
                {
                    "value": "100.028.338"
                }
            ],
            "atc": [
                {
                    "value": "N01AX15"
                },
                {
                    "value": "V09EX02",
                    "label": "[127]Xe"
                },
                {
                    "value": "V09EX03",
                    "label": "[133]Xe"
                }
            ]
        },
        "column": 32,
        "crystal_structure": "fcc",
        "density": {
            "value": 0.0058982,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 273.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Ramsay, Travers",
            "value": 1898
        },
        "electron_config": "Kr 4d[10] 5s[2] 5p[6]",
        "enthalpy": {
            "fusion": {
                "value": 2.3,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 12.64,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 0,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "atmophile",
        "group": 18,
        "hazard": {
            "h": [
                "280"
            ],
            "p": [
                "403"
            ],
            "ghs": [
                "04"
            ],
            "adr": [
                "2.2"
            ],
            "nfpa": {
                "h": "0",
                "f": "0",
                "i": "0",
                "s": "SA"
            }
        },
        "heat": {
            "thermal_conductivity": {
                "value": 0.00569,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/d/d7/Xenon_discharge_tube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Xenon_discharge_tube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                12.1298436,
                20.975,
                31.05,
                42.2,
                54.1
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "diamagnetic",
        "magnetic_susceptibility": {
            "value": -0.0000439,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "label": "phase-solid",
            "value": 0.00003592,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Xenon",
            "de": "Xenon",
            "la": "Xenon"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.6,
            "sanderson": 2.34,
            "allred": 2.4,
            "mulliken": 2.73,
            "allen": 2.582,
            "ghosh_gupta": {
                "value": 5.8121,
                "unit": "eV"
            },
            "nagle": 2.45
        },
        "number": 54,
        "optical": {
            "refractive_index": 1.000702
        },
        "oxide_character": "acidic",
        "period": 5,
        "phase": "gas",
        "price": {
            "value": 1800,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable"
        ],
        "radius": {
            "calculated": {
                "value": 108,
                "unit": "pm"
            },
            "covalent": {
                "value": 140,
                "deviation": 9,
                "unit": "pm"
            },
            "vdw": {
                "value": 216,
                "unit": "pm"
            }
        },
        "set": "noblegas",
        "shell": [
            2,
            8,
            18,
            18,
            8
        ],
        "sound_speed": [
            {
                "label": "phase-gas",
                "value": 169,
                "unit": "m·s[−1]"
            },
            {
                "label": "phase-liquid",
                "value": 1090,
                "unit": "m·s[−1]"
            }
        ],
        "standard_atomic_weight": {
            "value": 131.293,
            "deviation": 0.006
        },
        "superconductivity": "none",
        "symbol": "Xe",
        "temperature": {
            "melting": {
                "value": 161.4,
                "unit": "K"
            },
            "boiling": {
                "value": 165.051,
                "unit": "K"
            },
            "liquid": {
                "value": 3.651,
                "unit": "K"
            },
            "triple": {
                "value": 161.405,
                "unit": "K",
                "@": {
                    "value": 81.77,
                    "unit": "kPa"
                }
            },
            "critical": {
                "value": 289.733,
                "unit": "K",
                "@": {
                    "value": 5.842,
                    "unit": "MPa"
                }
            }
        },
        "wiki": {
            "en": "Xenon",
            "de": "Xenon"
        }
    },
    "cs": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 0.8,
                "unit": "ppb"
            },
            "sun": {
                "value": 8,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 140,
                "unit": "ppb"
            },
            "crust": {
                "value": 1900,
                "unit": "ppb"
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            "water": {
                "value": 0.5,
                "unit": "ppb"
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            "stream": {
                "value": 0.05,
                "unit": "ppb"
            },
            "human": {
                "value": 20,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "pale gold",
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        "atomic_mass": {
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                    "value": "7440-46-2"
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                {
                    "value": "231-155-4"
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                    "value": "100.028.323"
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            "condition": [
                {
                    "value": 293.15,
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                "value": 1.7,
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                "value": 1.6,
                "unit": "GPa"
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        },
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                "value": 4760000,
                "unit": "S·m[-1]"
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            "resistivity": {
                "value": 2.1e-7,
                "unit": "Ωm"
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        },
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                "value": 2.09,
                "unit": "kJ·mol[-1]"
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                "value": 65,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 76,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "lithophile",
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            "brinell": {
                "value": 0.14,
                "unit": "NM·m[-2]"
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        },
        "hazard": {
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                "314"
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            "p": [
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                "F",
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            "ghs": [
                "02",
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            "adr": [
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            "nfpa": {
                "h": "3",
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                "i": "3",
                "s": "W"
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        },
        "heat": {
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                "value": 36,
                "unit": "W·m[-1]·K[-1]"
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            "work_function": {
                "value": 2.14,
                "unit": "eV"
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        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/3/3d/Cesium.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Cesium.jpg\">Dnn87 Contact email: Dnn87yahoo.dk</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\">CC BY-SA 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
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                33.195,
                43,
                56
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            "de": "Caesium",
            "la": "Caesium"
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            "allred": 0.86,
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            "nagle": 0.79,
            "pearson": {
                "value": 2.18,
                "unit": "eV"
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        },
        "number": 55,
        "oxidation_state": "+1",
        "oxide_character": "basic",
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        "phase": "solid",
        "price": {
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            "unit": "USD"
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        "properties": [
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        "radius": {
            "empirical": {
                "value": 265,
                "unit": "pm"
            },
            "calculated": {
                "value": 298,
                "unit": "pm"
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            "covalent": {
                "value": 244,
                "deviation": 11,
                "unit": "pm"
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            "vdw": {
                "value": 343,
                "unit": "pm"
            }
        },
        "set": "alkalimetal",
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            18,
            18,
            8,
            1
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        "standard_atomic_weight": {
            "value": 132.905452,
            "deviation": 6e-8
        },
        "standard_potential": {
            "value": -2.923,
            "unit": "V",
            "info": "Cs[+] + e[-] → Cs"
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        "superconductivity": "special",
        "symbol": "Cs",
        "temperature": {
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                "value": 301.7,
                "unit": "K"
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            "boiling": {
                "value": 944,
                "unit": "K"
            },
            "liquid": {
                "value": 642.3,
                "unit": "K"
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            "critical": {
                "value": 1938,
                "unit": "K",
                "@": {
                    "value": 9.4,
                    "unit": "MPa"
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            "transition": {
                "value": 1.66,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Caesium",
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    },
    "ba": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 10,
                "unit": "ppb"
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            "sun": {
                "value": 10,
                "unit": "ppb"
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            "meteorite": {
                "value": 2800,
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                "value": 340000,
                "unit": "ppb"
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                "value": 30,
                "unit": "ppb"
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            "stream": {
                "value": 25,
                "unit": "ppb"
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            "human": {
                "value": 300,
                "unit": "ppb"
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        },
        "appearance": {
            "en": "silvery gray; with a pale yellow tint",
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                    "value": "231-149-1"
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                "value": 13,
                "unit": "GPa"
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                "value": 4.9,
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                "value": 9.6,
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                "value": 2940000,
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        },
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                "value": 8,
                "unit": "kJ·mol[-1]"
            },
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                "value": 140,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 182,
                "unit": "kJ·mol[-1]"
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        },
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                "303+361+353",
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            "hazard": [
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                "T"
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            "nfpa": {
                "h": "0",
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                "i": "1",
                "s": "W"
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        },
        "heat": {
            "thermal_conductivity": {
                "value": 18,
                "unit": "W·m[-1]·K[-1]"
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            "thermal_expansion": {
                "value": 0.0000206,
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            "work_function": {
                "value": 2.7,
                "range": [
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                "unit": "eV"
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        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/e/e3/Barium_dendritic.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Barium_dendritic.jpg\">La2O3</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\">CC BY-SA 4.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
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                35.8438,
                47,
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        "molar_volume": {
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        "names": {
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            "de": "Barium",
            "la": "Barium"
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        "natural_occurrence": "primordial",
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                "value": 2.4,
                "unit": "eV"
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        "number": 56,
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            "deviation": 0.015,
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        "radius": {
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                "value": 222,
                "unit": "pm"
            },
            "calculated": {
                "value": 253,
                "unit": "pm"
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            "covalent": {
                "value": 215,
                "deviation": 11,
                "unit": "pm"
            },
            "vdw": {
                "value": 268,
                "unit": "pm"
            }
        },
        "set": "alkalineearthmetal",
        "shell": [
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            8,
            18,
            18,
            8,
            2
        ],
        "sound_speed": {
            "value": 1620,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 137.327,
            "deviation": 0.007
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        "standard_potential": {
            "value": -2.92,
            "unit": "V",
            "info": "Ba[2+] + 2e[-] → Ba"
        },
        "superconductivity": "special",
        "symbol": "Ba",
        "temperature": {
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                "value": 1000,
                "unit": "K"
            },
            "boiling": {
                "value": 2118,
                "unit": "K"
            },
            "liquid": {
                "value": 1118,
                "unit": "K"
            },
            "transition": {
                "value": 5,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Barium",
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        }
    },
    "la": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 2,
                "unit": "ppb"
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            "meteorite": {
                "value": 290,
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                "value": 34000,
                "unit": "ppb"
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                "value": 0.0034,
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                "value": 0.2,
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        },
        "appearance": {
            "en": "silvery white",
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        "classification": {
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                    "value": "7439-91-0"
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            "eg": [
                {
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            "echa": [
                {
                    "value": "100.028.272"
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        },
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        "crystal_structure": "dhcp",
        "density": {
            "value": 6.17,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
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            ]
        },
        "discovery": {
            "by": "Mosander",
            "value": 1839
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        "elastic": {
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                "value": 37,
                "unit": "GPa"
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                "unit": "GPa"
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                "unit": "GPa"
            },
            "poisson": 0.28
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        "electrical": {
            "conductivity": {
                "value": 1630000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 6.15e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 5d[1] 6s[2]",
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                "value": 6.2,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 400,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 431,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
        "group": 19,
        "hardness": {
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            "brinell": {
                "value": 363,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 491,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228"
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            "p": [
                "210"
            ],
            "hazard": [
                "F"
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            "ghs": [
                "02"
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            "nfpa": {
                "h": "0",
                "f": "4",
                "i": "2",
                "s": "W"
            }
        },
        "heat": {
            "thermal_conductivity": {
                "value": 13,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000121,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/8/8c/Lanthanum-2.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Lanthanum-2.jpg\">Jurii (Lanthanum-138 at en.wikipedia</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                5.5769,
                11.18496,
                19.1773,
                49.95,
                61.6
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            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
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            "unit": "cm[3]·mol[−1]",
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                    "unit": "K"
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            ]
        },
        "molar_volume": {
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            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Lanthanum",
            "de": "Lanthan",
            "la": "Lanthanum"
        },
        "natural_occurrence": "primordial",
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                "unit": "eV"
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        },
        "number": 57,
        "oxidation_state": "3",
        "oxide_character": "basic",
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            "deviation": 0.07,
            "unit": "USD"
        },
        "properties": [
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            "rare"
        ],
        "radius": {
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                "value": 187,
                "unit": "pm"
            },
            "covalent": {
                "value": 207,
                "deviation": 8,
                "unit": "pm"
            }
        },
        "set": "lanthanoide",
        "shell": [
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            8,
            18,
            18,
            9,
            2
        ],
        "sound_speed": {
            "value": 2475,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 138.90547,
            "deviation": 0.00007
        },
        "standard_potential": {
            "value": -2.38,
            "unit": "V",
            "info": "La[3+] + 3e[-] → La"
        },
        "superconductivity": "normal",
        "symbol": "La",
        "temperature": {
            "melting": {
                "value": 1193,
                "unit": "K"
            },
            "boiling": {
                "value": 3737,
                "unit": "K"
            },
            "liquid": {
                "value": 2544,
                "unit": "K"
            },
            "transition": {
                "value": 6,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Lanthanum",
            "de": "Lanthan"
        }
    },
    "ce": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 10,
                "unit": "ppb"
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            "sun": {
                "value": 4,
                "unit": "ppb"
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            "meteorite": {
                "value": 760,
                "unit": "ppb"
            },
            "crust": {
                "value": 60000,
                "unit": "ppb"
            },
            "water": {
                "value": 0.0012,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.06,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
            "value": 140.1161,
            "unit": "u"
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        "basicity": "slightly-alkaline",
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                    "value": "7440-45-1"
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            "eg": [
                {
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            "echa": [
                {
                    "value": "100.028.322"
                }
            ]
        },
        "column": 4,
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        "density": {
            "value": 6.773,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
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            ]
        },
        "discovery": {
            "by": "von Hisinger, Berzelius, Klaproth",
            "value": 1803
        },
        "elastic": {
            "young": {
                "value": 34,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 14,
                "unit": "GPa"
            },
            "bulk": {
                "value": 22,
                "unit": "GPa"
            },
            "poisson": 0.24
        },
        "electrical": {
            "conductivity": {
                "value": 1350000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 7.4e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[1] 5d[1] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 5.5,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 350,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 423,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
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                "value": 412,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 270,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
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            ],
            "p": [
                "231+232",
                "233",
                "280",
                "370+378",
                "402+404",
                "501"
            ],
            "hazard": [
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            "ghs": [
                "02"
            ],
            "nfpa": {
                "h": "2",
                "f": "0",
                "i": "0",
                "s": ""
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        },
        "heat": {
            "thermal_conductivity": {
                "value": 11,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000063,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/0/0d/Cerium2.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Cerium2.jpg\">Jurii</a>, <a href=\"https://creativecommons.org/licenses/by/1.0\">CC BY 1.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                5.5386,
                10.956,
                20.1974,
                36.906,
                65.55
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            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.00245,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 293,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00002069,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Cerium",
            "de": "Cer",
            "la": "Cerium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.12,
            "allred": 1.08,
            "nagle": 1.05
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        "number": 58,
        "oxidation_state": "'''3''', 4",
        "oxide_character": "basic",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 4.64,
            "deviation": 0.07,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "heavy",
            "rare"
        ],
        "radius": {
            "empirical": {
                "value": 182,
                "unit": "pm"
            },
            "covalent": {
                "value": 204,
                "deviation": 9,
                "unit": "pm"
            }
        },
        "set": "lanthanoide",
        "shell": [
            2,
            8,
            18,
            19,
            9,
            2
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        "sound_speed": {
            "value": 2100,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
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        "standard_atomic_weight": {
            "value": 140.116,
            "deviation": 0.001
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        "standard_potential": {
            "value": -2.34,
            "unit": "V",
            "info": "Ce[3+] + 3e[-] → Ce"
        },
        "superconductivity": "special",
        "symbol": "Ce",
        "temperature": {
            "melting": {
                "value": 1068,
                "unit": "K"
            },
            "boiling": {
                "value": 3716,
                "unit": "K"
            },
            "liquid": {
                "value": 2648,
                "unit": "K"
            },
            "transition": {
                "value": 1.75,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Cerium",
            "de": "Cer"
        }
    },
    "pr": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 2,
                "unit": "ppb"
            },
            "sun": {
                "value": 1,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 100,
                "unit": "ppb"
            },
            "crust": {
                "value": 8700,
                "unit": "ppb"
            },
            "water": {
                "value": 0.0006,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.03,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "grayish white",
            "de": "silbrig weiß, gelblicher Farbton"
        },
        "atomic_mass": {
            "value": 140.907662,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-10-0"
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            ],
            "eg": [
                {
                    "value": "231-120-3"
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            "echa": [
                {
                    "value": "100.028.291"
                }
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        },
        "column": 5,
        "crystal_structure": "dhcp",
        "density": {
            "value": 6.475,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "von Welsbach",
            "value": 1895
        },
        "elastic": {
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                "value": 37,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 15,
                "unit": "GPa"
            },
            "bulk": {
                "value": 29,
                "unit": "GPa"
            },
            "poisson": 0.28
        },
        "electrical": {
            "conductivity": {
                "value": 1430000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 7e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[3] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 6.9,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 330,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 356,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "lithophile",
        "group": 19,
        "hardness": {
            "brinell": {
                "value": 481,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 400,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "250"
            ],
            "p": [
                "222",
                "231",
                "422"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ],
            "nfpa": {
                "h": "0",
                "f": "4",
                "i": "4",
                "s": ""
            }
        },
        "heat": {
            "thermal_conductivity": {
                "value": 13,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000067,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/c/c7/Praseodymium.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Praseodymium.jpg\">Jurii</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                5.4702,
                10.631,
                21.6237,
                39.981,
                57.53
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.00501,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 293,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.0000208,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Praseodymium",
            "de": "Praseodym",
            "la": "Praseodymium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.13,
            "allred": 1.07,
            "nagle": 1.06
        },
        "number": 59,
        "oxidation_state": "'''3''', 4, 2",
        "oxide_character": "basic",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 103,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "mononuclidic",
            "stable",
            "heavy",
            "rare"
        ],
        "radius": {
            "empirical": {
                "value": 182,
                "unit": "pm"
            },
            "calculated": {
                "value": 247,
                "unit": "pm"
            },
            "covalent": {
                "value": 203,
                "deviation": 7,
                "unit": "pm"
            }
        },
        "set": "lanthanoide",
        "shell": [
            2,
            8,
            18,
            21,
            8,
            2
        ],
        "sound_speed": {
            "value": 2280,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 140.90766,
            "deviation": 0.00001
        },
        "standard_potential": {
            "value": -2.35,
            "unit": "V",
            "info": "Pr[3+] + 3e[-] → Pr"
        },
        "superconductivity": "none",
        "symbol": "Pr",
        "temperature": {
            "melting": {
                "value": 1208,
                "unit": "K"
            },
            "boiling": {
                "value": 3403,
                "unit": "K"
            },
            "liquid": {
                "value": 2195,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Praseodymium",
            "de": "Praseodym"
        }
    },
    "nd": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 10,
                "unit": "ppb"
            },
            "sun": {
                "value": 3,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 510,
                "unit": "ppb"
            },
            "crust": {
                "value": 33000,
                "unit": "ppb"
            },
            "water": {
                "value": 0.0028,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.2,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white",
            "de": "silbrigweiß, gelblicher Farbton"
        },
        "atomic_mass": {
            "value": 144.2423,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-00-8"
                }
            ],
            "eg": [
                {
                    "value": "231-109-3"
                }
            ],
            "echa": [
                {
                    "value": "100.028.281"
                }
            ]
        },
        "column": 6,
        "crystal_structure": "dhcp",
        "density": {
            "value": 7.003,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "von Welsbach",
            "value": 1895
        },
        "elastic": {
            "young": {
                "value": 41,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 16,
                "unit": "GPa"
            },
            "bulk": {
                "value": 32,
                "unit": "GPa"
            },
            "poisson": 0.28
        },
        "electrical": {
            "conductivity": {
                "value": 1560000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 6.43e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[4] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 7.1,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 285,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 328,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "lithophile",
        "group": 19,
        "hardness": {
            "brinell": {
                "value": 265,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 343,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "315",
                "319",
                "335"
            ],
            "p": [
                "261",
                "305+351+338"
            ],
            "ghs": [
                "07"
            ],
            "adr": [
                "4.3"
            ],
            "nfpa": {
                "h": "2",
                "f": "0",
                "i": "0",
                "s": ""
            }
        },
        "heat": {
            "thermal_conductivity": {
                "value": 17,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000096,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/b/ba/Neodymium2.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Neodymium2.jpg\">http://images-of-elements.com/</a>, <a href=\"https://creativecommons.org/licenses/by/1.0\">CC BY 1.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                5.525,
                10.783,
                22.09,
                40.6,
                60
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.00563,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 287.7,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00002059,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Neodymium",
            "de": "Neodym",
            "la": "Neodymium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.14,
            "allred": 1.07,
            "nagle": 1.03
        },
        "number": 60,
        "oxidation_state": "2, '''3''' , 4",
        "oxide_character": "basic",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 57.5,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "heavy",
            "rare"
        ],
        "radius": {
            "empirical": {
                "value": 181,
                "unit": "pm"
            },
            "calculated": {
                "value": 206,
                "unit": "pm"
            },
            "covalent": {
                "value": 201,
                "deviation": 6,
                "unit": "pm"
            }
        },
        "set": "lanthanoide",
        "shell": [
            2,
            8,
            18,
            22,
            8,
            2
        ],
        "sound_speed": {
            "value": 2330,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 144.242,
            "deviation": 0.003
        },
        "standard_potential": {
            "value": -2.32,
            "unit": "V",
            "info": "Nd[3+] + 3e[-] → Nd"
        },
        "superconductivity": "none",
        "symbol": "Nd",
        "temperature": {
            "melting": {
                "value": 1297,
                "unit": "K"
            },
            "boiling": {
                "value": 3347,
                "unit": "K"
            },
            "liquid": {
                "value": 2050,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Neodymium",
            "de": "Neodym"
        }
    },
    "pm": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "sun": {
                "value": 0.005,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "metallic",
            "de": "metallisch"
        },
        "atomic_mass": {
            "value": 146.9151,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-12-2"
                }
            ],
            "eg": [
                {
                    "value": "231-121-9"
                }
            ],
            "echa": [
                {
                    "value": "100.028.292"
                }
            ]
        },
        "column": 7,
        "crystal_structure": "dhcp",
        "density": {
            "value": 7.2,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Marinsky",
            "value": 1945
        },
        "elastic": {
            "young": {
                "value": 46,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 18,
                "unit": "GPa"
            },
            "bulk": {
                "value": 33,
                "unit": "GPa"
            },
            "poisson": 0.28
        },
        "electrical": {
            "conductivity": {
                "value": 1330000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 7.5e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[5] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 7.7,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 290,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 350,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "quantum",
        "goldschmidt": "synthetic",
        "group": 19,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 15,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.000011,
                "unit": "K[-1]"
            }
        },
        "ionization": {
            "values": [
                5.58187,
                10.938,
                22.44,
                41.17,
                61.7
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
            "value": 0.0000201,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Promethium",
            "de": "Promethium",
            "la": "Promethium"
        },
        "natural_occurrence": "decay",
        "negativity": {
            "allred": 1.07,
            "nagle": 1.04
        },
        "number": 61,
        "oxidation_state": "3",
        "oxide_character": "basic",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 460000,
            "unit": "USD"
        },
        "properties": [
            "heavy",
            "rare",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "significantly-radioactive",
        "radius": {
            "empirical": {
                "value": 183,
                "unit": "pm"
            },
            "calculated": {
                "value": 205,
                "unit": "pm"
            },
            "covalent": {
                "value": 199,
                "unit": "pm"
            }
        },
        "set": "lanthanoide",
        "shell": [
            2,
            8,
            18,
            23,
            8,
            2
        ],
        "standard_potential": {
            "value": -2.423,
            "unit": "V",
            "info": "Pm[3+] + 3e[-] → Pm"
        },
        "superconductivity": "none",
        "symbol": "Pm",
        "temperature": {
            "melting": {
                "value": 1315,
                "unit": "K"
            },
            "boiling": {
                "value": 3273,
                "unit": "K"
            },
            "liquid": {
                "value": 1958,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Promethium",
            "de": "Promethium"
        }
    },
    "sm": {
        "@modified": "2024-01-30T08:19:24.156Z",
        "abundance": {
            "universe": {
                "value": 5,
                "unit": "ppb"
            },
            "sun": {
                "value": 1,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 170,
                "unit": "ppb"
            },
            "crust": {
                "value": 6000,
                "unit": "ppb"
            },
            "water": {
                "value": 0.00045,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.03,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
            "value": 150.362,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-19-9"
                }
            ],
            "eg": [
                {
                    "value": "231-128-7"
                }
            ],
            "echa": [
                {
                    "value": "100.028.298"
                }
            ]
        },
        "column": 8,
        "crystal_structure": "rho",
        "density": {
            "value": 7.536,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Lecoq de Boisbaudran",
            "value": 1879
        },
        "elastic": {
            "young": {
                "value": 50,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 20,
                "unit": "GPa"
            },
            "bulk": {
                "value": 38,
                "unit": "GPa"
            },
            "poisson": 0.27
        },
        "electrical": {
            "conductivity": {
                "value": 1060000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 9.4e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[6] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 8.6,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 175,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 207,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "lithophile",
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            8,
            18,
            24,
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            2
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        },
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        },
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                "value": 0.05,
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        "elastic": {
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                "value": 61,
                "unit": "GPa"
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            "rigidity": {
                "value": 25,
                "unit": "GPa"
            },
            "bulk": {
                "value": 41,
                "unit": "GPa"
            },
            "poisson": 0.25
        },
        "electrical": {
            "conductivity": {
                "value": 1080000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 9.26e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[10] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 11.1,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 280,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 290,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "lithophile",
        "group": 19,
        "hardness": {
            "brinell": {
                "value": 500,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 540,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228"
            ],
            "p": [
                "210"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ],
            "adr": [
                "4.1"
            ]
        },
        "heat": {
            "thermal_conductivity": {
                "value": 11,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000099,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/a/a8/Dy_chips.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Dy_chips.jpg\">Materialscientist at en.wikipedia</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\">CC BY-SA 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                5.93905,
                11.647,
                22.89,
                41.23,
                62.1
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            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.104,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 293.2,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00001901,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Dysprosium",
            "de": "Dysprosium",
            "la": "Dysprosium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.22,
            "allred": 1.1,
            "nagle": 1.09
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        "number": 66,
        "oxidation_state": "3",
        "oxide_character": "basic",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 307,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "heavy",
            "rare"
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        "radius": {
            "empirical": {
                "value": 178,
                "unit": "pm"
            },
            "calculated": {
                "value": 228,
                "unit": "pm"
            },
            "covalent": {
                "value": 192,
                "deviation": 7,
                "unit": "pm"
            }
        },
        "set": "lanthanoide",
        "shell": [
            2,
            8,
            18,
            28,
            8,
            2
        ],
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            "value": 2710,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 162.5,
            "deviation": 0.001
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        "standard_potential": {
            "value": -2.29,
            "unit": "V",
            "info": "Dy[3+] + 3e[-] → Dy"
        },
        "superconductivity": "none",
        "symbol": "Dy",
        "temperature": {
            "melting": {
                "value": 1680,
                "unit": "K"
            },
            "boiling": {
                "value": 2840,
                "unit": "K"
            },
            "liquid": {
                "value": 1160,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Dysprosium",
            "de": "Dysprosium"
        }
    },
    "ho": {
        "@modified": "2023-11-04T10:30:10.482Z",
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                "unit": "ppb"
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                "unit": "ppb"
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            "crust": {
                "value": 1200,
                "unit": "ppb"
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            "water": {
                "value": 0.00022,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.01,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
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            "unit": "u"
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        "basicity": "slightly-alkaline",
        "block": "f",
        "classification": {
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                {
                    "value": "7440-60-0"
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            ],
            "eg": [
                {
                    "value": "231-169-0"
                }
            ],
            "echa": [
                {
                    "value": "100.028.335"
                }
            ]
        },
        "column": 13,
        "crystal_structure": "hcp",
        "density": {
            "value": 8.78,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Soret",
            "value": 1878
        },
        "elastic": {
            "young": {
                "value": 65,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 26,
                "unit": "GPa"
            },
            "bulk": {
                "value": 40,
                "unit": "GPa"
            },
            "poisson": 0.23
        },
        "electrical": {
            "conductivity": {
                "value": 1230000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 8.14e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[11] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 17,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 265,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 301,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "lithophile",
        "group": 19,
        "hardness": {
            "brinell": {
                "value": 746,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 481,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228"
            ],
            "p": [
                "210"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ],
            "adr": [
                "4.1"
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        },
        "heat": {
            "thermal_conductivity": {
                "value": 16,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000112,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/0/0a/Holmium2.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Holmium2.jpg\">http://images-of-elements.com/</a>, <a href=\"https://creativecommons.org/licenses/by/1.0\">CC BY 1.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.0215,
                11.781,
                22.79,
                42.52,
                63.9
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            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
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            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Holmium",
            "de": "Holmium",
            "la": "Holmium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.23,
            "allred": 1.1,
            "nagle": 1.1
        },
        "number": 67,
        "oxidation_state": "3",
        "oxide_character": "basic",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 57.1,
            "unit": "USD"
        },
        "properties": [
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            "mononuclidic",
            "stable",
            "heavy",
            "rare"
        ],
        "radius": {
            "empirical": {
                "value": 176,
                "unit": "pm"
            },
            "calculated": {
                "value": 226,
                "unit": "pm"
            },
            "covalent": {
                "value": 192,
                "deviation": 7,
                "unit": "pm"
            }
        },
        "set": "lanthanoide",
        "shell": [
            2,
            8,
            18,
            29,
            8,
            2
        ],
        "sound_speed": {
            "value": 2760,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 164.930329,
            "deviation": 0.000005
        },
        "standard_potential": {
            "value": -2.33,
            "unit": "V",
            "info": "Ho[3+] + 3e[-] → Ho"
        },
        "superconductivity": "none",
        "symbol": "Ho",
        "temperature": {
            "melting": {
                "value": 1734,
                "unit": "K"
            },
            "boiling": {
                "value": 2873,
                "unit": "K"
            },
            "liquid": {
                "value": 1139,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Holmium",
            "de": "Holmium"
        }
    },
    "er": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 2,
                "unit": "ppb"
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            "sun": {
                "value": 1,
                "unit": "ppb"
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            "meteorite": {
                "value": 180,
                "unit": "ppb"
            },
            "crust": {
                "value": 3000,
                "unit": "ppb"
            },
            "water": {
                "value": 0.0009,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.05,
                "unit": "ppb"
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        },
        "appearance": {
            "en": "silvery white",
            "de": "silbrig weiß"
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            "unit": "u"
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                {
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            "echa": [
                {
                    "value": "100.028.327"
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            ]
        },
        "column": 14,
        "crystal_structure": "hcp",
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            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Mosander",
            "value": 1842
        },
        "elastic": {
            "young": {
                "value": 70,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 28,
                "unit": "GPa"
            },
            "bulk": {
                "value": 44,
                "unit": "GPa"
            },
            "poisson": 0.24
        },
        "electrical": {
            "conductivity": {
                "value": 1160000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 8.6e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[12] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 19.9,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 285,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 317,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
        "group": 19,
        "hardness": {
            "brinell": {
                "value": 814,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 589,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228"
            ],
            "p": [
                "210"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ],
            "adr": [
                "4.1"
            ]
        },
        "heat": {
            "thermal_conductivity": {
                "value": 15,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000122,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/8/88/Erbium_%2868_Er%29.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Erbium_(68_Er).jpg\">Hi-Res Images of Chemical Elements</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.1077,
                11.916,
                22.7,
                42.42,
                65.1
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.0443,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "value": 0.00001846,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Erbium",
            "de": "Erbium",
            "la": "Erbium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.24,
            "allred": 1.11,
            "nagle": 1.11
        },
        "number": 68,
        "oxidation_state": "3",
        "oxide_character": "basic",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 26.4,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "heavy",
            "rare"
        ],
        "radius": {
            "empirical": {
                "value": 176,
                "unit": "pm"
            },
            "calculated": {
                "value": 226,
                "unit": "pm"
            },
            "covalent": {
                "value": 189,
                "deviation": 6,
                "unit": "pm"
            }
        },
        "set": "lanthanoide",
        "shell": [
            2,
            8,
            18,
            30,
            8,
            2
        ],
        "sound_speed": {
            "value": 2830,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 167.259,
            "deviation": 0.003
        },
        "standard_potential": {
            "value": -2.32,
            "unit": "V",
            "info": "Er[3+] + 3e[-] → Er"
        },
        "superconductivity": "none",
        "symbol": "Er",
        "temperature": {
            "melting": {
                "value": 1802,
                "unit": "K"
            },
            "boiling": {
                "value": 3141,
                "unit": "K"
            },
            "liquid": {
                "value": 1339,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Erbium",
            "de": "Erbium"
        }
    },
    "tm": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 0.1,
                "unit": "ppb"
            },
            "sun": {
                "value": 0.2,
                "unit": "ppb"
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            "meteorite": {
                "value": 30,
                "unit": "ppb"
            },
            "crust": {
                "value": 450,
                "unit": "ppb"
            },
            "water": {
                "value": 0.0002,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.009,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery gray",
            "de": "silbrig grau"
        },
        "atomic_mass": {
            "value": 168.934222,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-30-4"
                }
            ],
            "eg": [
                {
                    "value": "231-140-2"
                }
            ],
            "echa": [
                {
                    "value": "100.028.309"
                }
            ]
        },
        "column": 15,
        "crystal_structure": "hcp",
        "density": {
            "value": 9.318,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Cleve",
            "value": 1879
        },
        "elastic": {
            "young": {
                "value": 74,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 31,
                "unit": "GPa"
            },
            "bulk": {
                "value": 45,
                "unit": "GPa"
            },
            "poisson": 0.21
        },
        "electrical": {
            "conductivity": {
                "value": 1480000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 6.76e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[13] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 16.8,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 250,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 232,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "lithophile",
        "group": 19,
        "hardness": {
            "brinell": {
                "value": 471,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 520,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228",
                "319",
                "335"
            ],
            "p": [
                "210",
                "261",
                "305+351+338"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02",
                "07"
            ],
            "adr": [
                "4.1"
            ]
        },
        "heat": {
            "thermal_conductivity": {
                "value": 16.8,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000133,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/1/1e/Thulium_sublimed_dendritic_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Thulium_sublimed_dendritic_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.18431,
                12.065,
                23.66,
                42.41,
                65.4
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.0255,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 291,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.0000191,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Thulium",
            "de": "Thulium",
            "la": "Thulium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.25,
            "allred": 1.11,
            "nagle": 1.12
        },
        "number": 69,
        "oxidation_state": "2, '''3''', 4",
        "oxide_character": "basic",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 3000,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "mononuclidic",
            "stable",
            "heavy",
            "rare"
        ],
        "radius": {
            "empirical": {
                "value": 176,
                "unit": "pm"
            },
            "calculated": {
                "value": 222,
                "unit": "pm"
            },
            "covalent": {
                "value": 190,
                "deviation": 10,
                "unit": "pm"
            }
        },
        "set": "lanthanoide",
        "shell": [
            2,
            8,
            18,
            31,
            8,
            2
        ],
        "standard_atomic_weight": {
            "value": 168.934219,
            "deviation": 0.000005
        },
        "standard_potential": {
            "value": -2.32,
            "unit": "V",
            "info": "Tm[3+] + 3e[-] → Tm"
        },
        "superconductivity": "none",
        "symbol": "Tm",
        "temperature": {
            "melting": {
                "value": 1818,
                "unit": "K"
            },
            "boiling": {
                "value": 2223,
                "unit": "K"
            },
            "liquid": {
                "value": 405,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Thulium",
            "de": "Thulium"
        }
    },
    "yb": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 2,
                "unit": "ppb"
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            "sun": {
                "value": 1,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 180,
                "unit": "ppb"
            },
            "crust": {
                "value": 2800,
                "unit": "ppb"
            },
            "water": {
                "value": 0.0008,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.05,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white; with a pale yellow tint",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
            "value": 173.0451,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-64-4"
                }
            ],
            "eg": [
                {
                    "value": "231-173-2"
                }
            ],
            "echa": [
                {
                    "value": "100.028.339"
                }
            ]
        },
        "column": 16,
        "crystal_structure": "fcc",
        "density": {
            "value": 6.973,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "de Marignac",
            "value": 1878
        },
        "elastic": {
            "young": {
                "value": 24,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 9.9,
                "unit": "GPa"
            },
            "bulk": {
                "value": 31,
                "unit": "GPa"
            },
            "poisson": 0.21
        },
        "electrical": {
            "conductivity": {
                "value": 4000000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 2.5e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[14] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 7.7,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 160,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 152,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "lithophile",
        "group": 19,
        "hardness": {
            "brinell": {
                "value": 343,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 206,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228",
                "302",
                "312",
                "315",
                "319",
                "332",
                "335"
            ],
            "p": [
                "210",
                "261",
                "280",
                "305+351+338"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02",
                "07"
            ],
            "adr": [
                "4.1"
            ]
        },
        "heat": {
            "thermal_conductivity": {
                "value": 39,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000263,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/c/ce/Ytterbium-3.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Ytterbium-3.jpg\">Jurii</a>, <a href=\"https://creativecommons.org/licenses/by/1.0\">CC BY 1.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.25416,
                12.179185,
                25.053,
                43.61,
                65.6
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.000249,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00002484,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Ytterbium",
            "de": "Ytterbium",
            "la": "Ytterbium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "allred": 1.06,
            "nagle": 1.13
        },
        "number": 70,
        "oxidation_state": "2, '''3'''",
        "oxide_character": "basic",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 17.1,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "heavy",
            "rare"
        ],
        "radius": {
            "empirical": {
                "value": 176,
                "unit": "pm"
            },
            "calculated": {
                "value": 222,
                "unit": "pm"
            },
            "covalent": {
                "value": 187,
                "deviation": 8,
                "unit": "pm"
            }
        },
        "set": "lanthanoide",
        "shell": [
            2,
            8,
            18,
            32,
            8,
            2
        ],
        "sound_speed": {
            "value": 1590,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 173.045,
            "deviation": 0.01
        },
        "standard_potential": {
            "value": -2.22,
            "unit": "V",
            "info": "Yb[3+] + 3e[-] → Yb"
        },
        "superconductivity": "none",
        "symbol": "Yb",
        "temperature": {
            "melting": {
                "value": 1097,
                "unit": "K"
            },
            "boiling": {
                "value": 1469,
                "unit": "K"
            },
            "liquid": {
                "value": 372,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Ytterbium",
            "de": "Ytterbium"
        }
    },
    "lu": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 0.1,
                "unit": "ppb"
            },
            "sun": {
                "value": 1,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 30,
                "unit": "ppb"
            },
            "crust": {
                "value": 560,
                "unit": "ppb"
            },
            "water": {
                "value": 0.00015,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.008,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
            "value": 174.96681,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7439-94-3"
                }
            ],
            "eg": [
                {
                    "value": "231-103-0"
                }
            ],
            "echa": [
                {
                    "value": "100.028.275"
                }
            ]
        },
        "column": 17,
        "crystal_structure": "hcp",
        "density": {
            "value": 9.84,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "von Welsbach, Urbain",
            "value": 1907
        },
        "elastic": {
            "young": {
                "value": 69,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 27,
                "unit": "GPa"
            },
            "bulk": {
                "value": 48,
                "unit": "GPa"
            },
            "poisson": 0.26
        },
        "electrical": {
            "conductivity": {
                "value": 1720000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 5.8e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[14] 5d[1] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 22,
                "*": true,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 415,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 428,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "quantum",
        "goldschmidt": "lithophile",
        "group": 19,
        "hardness": {
            "brinell": {
                "value": 893,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 1160,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228"
            ],
            "p": [
                "210"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ]
        },
        "heat": {
            "thermal_conductivity": {
                "value": 16,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000099,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/7/74/Lutetium_sublimed_dendritic_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Lutetium_sublimed_dendritic_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                5.425871,
                14.13,
                20.9594,
                45.249,
                66.8
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
            "value": 0.00001778,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Lutetium",
            "de": "Lutetium",
            "la": "Lutetium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.27,
            "allred": 1.14,
            "nagle": 1.12
        },
        "number": 71,
        "oxidation_state": "3",
        "oxide_character": "basic",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 643,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "heavy",
            "rare"
        ],
        "radius": {
            "empirical": {
                "value": 174,
                "unit": "pm"
            },
            "calculated": {
                "value": 217,
                "unit": "pm"
            },
            "covalent": {
                "value": 187,
                "deviation": 8,
                "unit": "pm"
            }
        },
        "set": "lanthanoide",
        "shell": [
            2,
            8,
            18,
            32,
            9,
            2
        ],
        "standard_atomic_weight": {
            "value": 174.9668,
            "deviation": 0.0001
        },
        "standard_potential": {
            "value": -2.3,
            "unit": "V",
            "info": "Lu[3+] + 3e[-] → Lu"
        },
        "superconductivity": "normal",
        "symbol": "Lu",
        "temperature": {
            "melting": {
                "value": 1925,
                "unit": "K"
            },
            "boiling": {
                "value": 3675,
                "unit": "K"
            },
            "liquid": {
                "value": 1750,
                "unit": "K"
            },
            "transition": {
                "value": 0.1,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Lutetium",
            "de": "Lutetium"
        }
    },
    "hf": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 0.7,
                "unit": "ppb"
            },
            "sun": {
                "value": 1,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 170,
                "unit": "ppb"
            },
            "crust": {
                "value": 3300,
                "unit": "ppb"
            },
            "water": {
                "value": 0.008,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "steel gray",
            "de": "stahlgrau"
        },
        "atomic_mass": {
            "value": 178.492,
            "unit": "u"
        },
        "basicity": "amphoterism",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7440-58-6"
                }
            ],
            "eg": [
                {
                    "value": "231-166-4"
                }
            ],
            "echa": [
                {
                    "value": "100.028.333"
                }
            ]
        },
        "column": 18,
        "crystal_structure": "hcp",
        "density": {
            "value": 13.28,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Coster, de Hevesy",
            "value": 1923
        },
        "elastic": {
            "young": {
                "value": 78,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 30,
                "unit": "GPa"
            },
            "bulk": {
                "value": 110,
                "unit": "GPa"
            },
            "poisson": 0.37
        },
        "electrical": {
            "conductivity": {
                "value": 3120000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 3.4e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[14] 5d[2] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 25.5,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 630,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 621,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "quantum",
        "goldschmidt": "lithophile",
        "group": 4,
        "hardness": {
            "mohs": 5.5,
            "brinell": {
                "value": 1700,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 1760,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "250"
            ],
            "p": [
                "210"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ],
            "adr": [
                "4.2"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 140,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 23,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000059,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/b/b7/Hafnium_bits.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Hafnium_bits.jpg\">Deglr6328 at the English-language Wikipedia</a>, <a href=\"http://creativecommons.org/licenses/by-sa/3.0/\">CC BY-SA 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.82507,
                114.61,
                22.55,
                33.37,
                68.37
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.000075,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00001344,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Hafnium",
            "de": "Hafnium",
            "la": "Hafnium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.3,
            "allred": 1.23,
            "nagle": 1.2,
            "pearson": {
                "value": 3.8,
                "unit": "eV"
            }
        },
        "number": 72,
        "oxidation_state": "2, 4",
        "oxide_character": "amphoteric",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 900,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "heavy",
            "refractory"
        ],
        "radius": {
            "empirical": {
                "value": 159,
                "unit": "pm"
            },
            "calculated": {
                "value": 208,
                "unit": "pm"
            },
            "covalent": {
                "value": 175,
                "deviation": 10,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            32,
            10,
            2
        ],
        "sound_speed": {
            "value": 3010,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 178.486,
            "deviation": 0.006
        },
        "standard_potential": {
            "value": -1.505,
            "unit": "V",
            "info": "HfO{2} + 4H[+] + 4e[-] → Hf + 2H{2}O"
        },
        "superconductivity": "normal",
        "symbol": "Hf",
        "temperature": {
            "melting": {
                "value": 2506,
                "unit": "K"
            },
            "boiling": {
                "value": 4876,
                "unit": "K"
            },
            "liquid": {
                "value": 2370,
                "unit": "K"
            },
            "transition": {
                "value": 0.38,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Hafnium",
            "de": "Hafnium"
        }
    },
    "ta": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 0.08,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 20,
                "unit": "ppb"
            },
            "crust": {
                "value": 1700,
                "unit": "ppb"
            },
            "water": {
                "value": 0.002,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "gray blue",
            "de": "grau"
        },
        "atomic_mass": {
            "value": 180.947882,
            "unit": "u"
        },
        "basicity": "slightly-acidic",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7440-25-7"
                }
            ],
            "eg": [
                {
                    "value": "231-135-5"
                }
            ],
            "echa": [
                {
                    "value": "100.028.304"
                }
            ]
        },
        "column": 19,
        "crystal_structure": "bcc",
        "density": {
            "value": 16.65,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Ekeberg",
            "value": 1802
        },
        "elastic": {
            "young": {
                "value": 186,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 69,
                "unit": "GPa"
            },
            "bulk": {
                "value": 200,
                "unit": "GPa"
            },
            "poisson": 0.34
        },
        "electrical": {
            "conductivity": {
                "value": 7610000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 1.35e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[14] 5d[3] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 36,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 735,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 782,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
        "group": 5,
        "hardness": {
            "mohs": 6.5,
            "brinell": {
                "value": 800,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 873,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228"
            ],
            "p": [
                "210",
                "240",
                "241",
                "280",
                "370+378"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ],
            "adr": [
                "4.1"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 140,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 57,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000063,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/8/83/Tantalum_single_crystal_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Tantalum_single_crystal_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a> (FAL or <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>), via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                7.549571,
                16.2,
                32.1,
                35,
                48.272
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.000154,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 293,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00001085,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Tantalum",
            "de": "Tantal",
            "la": "Tantalum"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.5,
            "allred": 1.33,
            "nagle": 1.26,
            "pearson": {
                "value": 4.11,
                "unit": "eV"
            }
        },
        "number": 73,
        "optical": {
            "reflectivity": {
                "value": 78,
                "unit": "%"
            }
        },
        "oxidation_state": "5",
        "oxide_character": "amphoteric",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 305,
            "deviation": 7,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "heavy",
            "refractory"
        ],
        "radius": {
            "empirical": {
                "value": 146,
                "unit": "pm"
            },
            "calculated": {
                "value": 200,
                "unit": "pm"
            },
            "covalent": {
                "value": 170,
                "deviation": 8,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            32,
            11,
            2
        ],
        "sound_speed": {
            "value": 3400,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 180.94788,
            "deviation": 0.00002
        },
        "standard_potential": {
            "value": -0.81,
            "unit": "V",
            "info": "½Ta{2}O{5} + 5H[+] + 5e[-] → Ta + 2½H{2}O"
        },
        "superconductivity": "normal",
        "symbol": "Ta",
        "temperature": {
            "melting": {
                "value": 3290,
                "unit": "K"
            },
            "boiling": {
                "value": 5731,
                "unit": "K"
            },
            "liquid": {
                "value": 2441,
                "unit": "K"
            },
            "transition": {
                "value": 4.4,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Tantalum",
            "de": "Tantal"
        }
    },
    "w": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 0.5,
                "unit": "ppb"
            },
            "sun": {
                "value": 4,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 120,
                "unit": "ppb"
            },
            "crust": {
                "value": 1100,
                "unit": "ppb"
            },
            "water": {
                "value": 0.12,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.03,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "grayish white, lustrous",
            "de": "gräulich weiß, glänzend"
        },
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            "value": 183.841,
            "unit": "u"
        },
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        "block": "d",
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            "cas": [
                {
                    "value": "7440-33-7"
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            "eg": [
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            ],
            "echa": [
                {
                    "value": "100.028.312"
                }
            ]
        },
        "column": 20,
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            "unit": "g·cm[−3]",
            "condition": [
                {
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                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Fausto und Juan de Elhuyar",
            "value": 1783
        },
        "elastic": {
            "young": {
                "value": 411,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 161,
                "unit": "GPa"
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                "unit": "GPa"
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            "poisson": 0.28
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        "electrical": {
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                "value": 18500000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 5.4e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[14] 5d[4] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 35,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 800,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 860,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "siderophile",
        "group": 6,
        "hardness": {
            "mohs": 7.5,
            "brinell": {
                "value": 2570,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 3430,
                "unit": "NM·m[-2]"
            }
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        "hazard": {
            "h": [
                "228"
            ],
            "p": [
                "210",
                "240",
                "241",
                "280",
                "370+378"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ],
            "adr": [
                "4.1"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 138,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 170,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000045,
                "unit": "K[-1]"
            },
            "work_function": {
                "value": 4.55,
                "unit": "eV"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/1/1a/Wolfram_evaporated_crystals_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Wolfram_evaporated_crystals_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a> (FAL or <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>), via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                7.86403,
                16.37,
                26,
                38.2,
                51.6
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.000059,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 298,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00000947,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Tungsten",
            "de": "Wolfram",
            "la": "Wolframium"
        },
        "natural_occurrence": "primordial",
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            "sanderson": 0.98,
            "allred": 1.4,
            "nagle": 1.31,
            "pearson": {
                "value": 4.4,
                "unit": "eV"
            }
        },
        "number": 74,
        "optical": {
            "reflectivity": {
                "value": 62,
                "unit": "%"
            }
        },
        "oxidation_state": "'''6''', 5, 4, 3, 2",
        "oxide_character": "amphoteric",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 35.3,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "vital",
            "stable",
            "heavy",
            "refractory"
        ],
        "radius": {
            "empirical": {
                "value": 139,
                "unit": "pm"
            },
            "calculated": {
                "value": 193,
                "unit": "pm"
            },
            "covalent": {
                "value": 162,
                "deviation": 7,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            32,
            12,
            2
        ],
        "sound_speed": {
            "value": 5174,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 183.84,
            "deviation": 0.01
        },
        "standard_potential": {
            "value": -0.119,
            "unit": "V",
            "info": "WO{2} + 4H[+] + 4e[-] → W + 2H{2}O"
        },
        "superconductivity": "normal",
        "symbol": "W",
        "temperature": {
            "melting": {
                "value": 3695,
                "unit": "K"
            },
            "boiling": {
                "value": 6203,
                "unit": "K"
            },
            "liquid": {
                "value": 2508,
                "unit": "K"
            },
            "transition": {
                "value": 0.01,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Tungsten",
            "de": "Wolfram"
        }
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    "re": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
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                "value": 0.2,
                "unit": "ppb"
            },
            "sun": {
                "value": 0.1,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 50,
                "unit": "ppb"
            },
            "crust": {
                "value": 2.6,
                "unit": "ppb"
            },
            "water": {
                "value": 0.001,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery-grayish",
            "de": "gräulich weiß"
        },
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            "unit": "u"
        },
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        "block": "d",
        "classification": {
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                {
                    "value": "7440-15-5"
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            ],
            "eg": [
                {
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            ],
            "echa": [
                {
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                }
            ]
        },
        "column": 21,
        "crystal_structure": "hcp",
        "density": {
            "value": 21,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 298.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Noddack, Tacke, Berg",
            "value": 1925
        },
        "elastic": {
            "young": {
                "value": 463,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 178,
                "unit": "GPa"
            },
            "bulk": {
                "value": 370,
                "unit": "GPa"
            },
            "poisson": 0.3
        },
        "electrical": {
            "conductivity": {
                "value": 5560000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 1.8e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[14] 5d[5] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 33,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 705,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 776,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "quantum",
        "goldschmidt": "siderophile",
        "group": 7,
        "hardness": {
            "mohs": 7,
            "brinell": {
                "value": 1320,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 2450,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228"
            ],
            "p": [
                "210"
            ],
            "hazard": [
                "F"
            ],
            "ghs": [
                "02"
            ],
            "adr": [
                "4.1"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 137,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 48,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000062,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/7/71/Rhenium_single_crystal_bar_and_1cm3_cube.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Rhenium_single_crystal_bar_and_1cm3_cube.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                7.83352,
                16.6,
                27,
                39.1,
                51.9
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.0000676,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 293,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.00000886,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Rhenium",
            "de": "Rhenium",
            "la": "Rhenium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.9,
            "allred": 1.46,
            "nagle": 1.35,
            "pearson": {
                "value": 4.02,
                "unit": "eV"
            }
        },
        "number": 75,
        "oxidation_state": "-3 … 7",
        "oxide_character": "acidic",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 3580,
            "deviation": 570,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "stable",
            "heavy"
        ],
        "radius": {
            "empirical": {
                "value": 137,
                "unit": "pm"
            },
            "calculated": {
                "value": 188,
                "unit": "pm"
            },
            "covalent": {
                "value": 151,
                "deviation": 7,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            32,
            13,
            2
        ],
        "sound_speed": {
            "value": 4700,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 186.207,
            "deviation": 0.001
        },
        "standard_potential": {
            "value": -0.276,
            "unit": "V",
            "info": "ReO{2} + 4H[+] + 4e[-] → Re + 2H{2}O"
        },
        "superconductivity": "normal",
        "symbol": "Re",
        "temperature": {
            "melting": {
                "value": 3459,
                "unit": "K"
            },
            "boiling": {
                "value": 5903,
                "unit": "K"
            },
            "liquid": {
                "value": 2444,
                "unit": "K"
            },
            "transition": {
                "value": 1.7,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Rhenium",
            "de": "Rhenium"
        }
    },
    "os": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 3,
                "unit": "ppb"
            },
            "sun": {
                "value": 2,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 670,
                "unit": "ppb"
            },
            "crust": {
                "value": 1.8,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery, blue cast",
            "de": "bläulich grau"
        },
        "atomic_mass": {
            "value": 190.233,
            "unit": "u"
        },
        "basicity": "slightly-acidic",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7440-04-2"
                }
            ],
            "eg": [
                {
                    "value": "231-114-0"
                }
            ],
            "echa": [
                {
                    "value": "100.028.285"
                }
            ]
        },
        "column": 22,
        "crystal_structure": "hcp",
        "density": {
            "value": 22.59,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Tennant",
            "value": 1803
        },
        "elastic": {
            "rigidity": {
                "value": 222,
                "unit": "GPa"
            },
            "poisson": 0.25
        },
        "electrical": {
            "conductivity": {
                "value": 10900000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 8.1e-8,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[14] 5d[6] 6s[2]",
        "enthalpy": {
            "fusion": {
                "value": 31,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 630,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 789,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "siderophile",
        "group": 8,
        "hardness": {
            "mohs": 7,
            "brinell": {
                "value": 3920,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "228",
                "315",
                "318",
                "335"
            ],
            "p": [
                "210",
                "261",
                "280",
                "302+352",
                "305+351+338"
            ],
            "hazard": [
                "F",
                "C"
            ],
            "ghs": [
                "02",
                "05",
                "07"
            ],
            "adr": [
                "4.1"
            ]
        },
        "heat": {
            "heat_capacity": {
                "value": 130,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 88,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000051,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/0/0c/Osmium_crystals.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Osmium_crystals.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a> (FAL or <a href=\"http://www.gnu.org/licenses/old-licenses/fdl-1.2.html\">GFDL 1.2</a>), via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                8.43823,
                17,
                25,
                41,
                55
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.000011,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "value": 0.00000842,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Osmium",
            "de": "Osmium",
            "la": "Osmium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 2.2,
            "allred": 1.52,
            "nagle": 1.39,
            "pearson": {
                "value": 4.9,
                "unit": "eV"
            }
        },
        "number": 76,
        "oxidation_state": "-2, 0, 2, 3, '''4''', 6, 8",
        "oxide_character": "basic",
        "period": 6,
        "phase": "solid",
        "price": {
            "value": 12000,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "native",
            "stable",
            "noble",
            "heavy",
            "platinum"
        ],
        "radius": {
            "empirical": {
                "value": 135,
                "unit": "pm"
            },
            "calculated": {
                "value": 185,
                "unit": "pm"
            },
            "covalent": {
                "value": 144,
                "deviation": 4,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            32,
            14,
            2
        ],
        "sound_speed": {
            "value": 4940,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 190.23,
            "deviation": 0.03
        },
        "standard_potential": {
            "value": 0.85,
            "unit": "V",
            "info": "OsO{4} + 8H[+] + 8e[-] → Os + 4H{2}O"
        },
        "superconductivity": "normal",
        "symbol": "Os",
        "temperature": {
            "melting": {
                "value": 3306,
                "unit": "K"
            },
            "boiling": {
                "value": 5285,
                "unit": "K"
            },
            "liquid": {
                "value": 1979,
                "unit": "K"
            },
            "transition": {
                "value": 0.7,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Osmium",
            "de": "Osmium"
        }
    },
    "ir": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 2,
                "unit": "ppb"
            },
            "sun": {
                "value": 2,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 550,
                "unit": "ppb"
            },
            "crust": {
                "value": 0.4,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
            "value": 192.2173,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7439-88-5"
                }
            ],
            "eg": [
                {
                    "value": "231-095-9"
                }
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            "echa": [
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                40,
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            15,
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            "url": "https://upload.wikimedia.org/wikipedia/commons/6/64/Or_natif1.jpg",
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        },
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        },
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    },
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                    "unit": "K"
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                "s": ""
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        },
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                "value": 4.91,
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            "value": 208.9804,
            "deviation": 0.00001
        },
        "standard_potential": {
            "value": 0.317,
            "unit": "V",
            "info": "Bi[3+] + 3e[-] → Bi"
        },
        "superconductivity": "special",
        "symbol": "Bi",
        "temperature": {
            "melting": {
                "value": 544.7,
                "unit": "K"
            },
            "boiling": {
                "value": 1837,
                "unit": "K"
            },
            "liquid": {
                "value": 1292.3,
                "unit": "K"
            },
            "transition": {
                "value": 8.7,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LD{50}",
                "organism": "rats",
                "application": "oral",
                "value": {
                    "value": 5000,
                    "unit": "mg·kg[-1]"
                }
            }
        ],
        "wiki": {
            "en": "Bismuth",
            "de": "Bismut"
        }
    },
    "po": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "water": {
                "value": 2e-11,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery",
            "de": "silbrig"
        },
        "atomic_mass": {
            "value": 209.98,
            "*": true,
            "unit": "u"
        },
        "basicity": "amphoterism",
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7440-08-6",
                    "label": "[209]Po"
                }
            ],
            "eg": [
                {
                    "value": "231-118-2"
                }
            ],
            "echa": [
                {
                    "value": "100.028.289"
                }
            ]
        },
        "column": 30,
        "crystal_structure": "sc",
        "density": {
            "value": 9.196,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Marie und Pierre Curie",
            "value": 1898
        },
        "electrical": {
            "conductivity": {
                "value": 2500000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 4e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Xe 4f[14] 5d[10] 6s[2] 6p[4]",
        "enthalpy": {
            "fusion": {
                "value": 13,
                "*": true,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 100,
                "*": true,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 142,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "synthetic",
        "group": 16,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 20,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "ionization": {
            "values": [
                8.41807,
                19.3,
                27.3,
                36,
                57,
                69.1
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "nonmagnetic",
        "molar_volume": {
            "value": 0.00002297,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Polonium",
            "de": "Polonium",
            "la": "Polonium"
        },
        "natural_occurrence": "decay",
        "negativity": {
            "pauling": 2,
            "allred": 1.76,
            "mulliken": 2.48,
            "nagle": 1.96
        },
        "number": 84,
        "oxidation_state": "(-2), 2, '''4''', 6",
        "oxide_character": "acidic",
        "period": 6,
        "phase": "solid",
        "properties": [
            "natural",
            "heavy",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "significantly-radioactive",
        "radius": {
            "empirical": {
                "value": 168,
                "unit": "pm"
            },
            "calculated": {
                "value": 135,
                "unit": "pm"
            },
            "covalent": {
                "value": 140,
                "deviation": 4,
                "unit": "pm"
            },
            "vdw": {
                "value": 197,
                "unit": "pm"
            }
        },
        "set": "metal",
        "shell": [
            2,
            8,
            18,
            32,
            18,
            6
        ],
        "standard_potential": {
            "value": 0.37,
            "unit": "V",
            "info": "Po[2+] + 2e[-] → Po"
        },
        "superconductivity": "none",
        "symbol": "Po",
        "temperature": {
            "melting": {
                "value": 527,
                "unit": "K"
            },
            "boiling": {
                "value": 1235,
                "unit": "K"
            },
            "liquid": {
                "value": 708,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Polonium",
            "de": "Polonium"
        }
    },
    "at": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "appearance": {
            "en": "unknown, probably metallic",
            "de": "metallisch"
        },
        "atomic_mass": {
            "value": 209.9871,
            "*": true,
            "unit": "u"
        },
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "7440-68-8"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 31,
        "crystal_structure": "fcc",
        "density": {
            "value": 6.4,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Segrè",
            "value": 1940
        },
        "electron_config": "Xe 4f[14] 5d[10] 6s[2] 6p[5]",
        "enthalpy": {
            "fusion": {
                "value": 6,
                "*": true,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 40,
                "*": true,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "quantum",
        "goldschmidt": "synthetic",
        "group": 17,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 2,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "ionization": {
            "values": [
                9.31751,
                17.88,
                26.58,
                39.65,
                50.39,
                72,
                85.1
            ],
            "unit": "eV"
        },
        "molar_volume": {
            "value": 0.000033,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Astatine",
            "de": "Astat",
            "la": "Astaton"
        },
        "natural_occurrence": "decay",
        "negativity": {
            "pauling": 2.2,
            "allred": 1.9,
            "mulliken": 2.85,
            "nagle": 2.12
        },
        "number": 85,
        "oxidation_state": "±1, 3, 5, 7",
        "oxide_character": "acidic",
        "period": 6,
        "phase": "solid",
        "properties": [
            "natural",
            "heavy",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "highly-radioactive",
        "radius": {
            "calculated": {
                "value": 127,
                "unit": "pm"
            }
        },
        "set": "halogen",
        "shell": [
            2,
            8,
            18,
            32,
            18,
            7
        ],
        "superconductivity": "none",
        "symbol": "At",
        "wiki": {
            "en": "Astatine",
            "de": "Astat"
        }
    },
    "rn": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "water": {
                "value": 6e-13,
                "unit": "ppb"
            },
            "stream": {
                "value": 2e-13,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "colorless gas",
            "de": "farbloses Gas"
        },
        "atomic_mass": {
            "value": 222,
            "*": true,
            "unit": "u"
        },
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "10043-92-2"
                }
            ],
            "eg": [
                {
                    "value": "233-146-0"
                }
            ],
            "echa": [
                {
                    "value": "100.030.120"
                }
            ]
        },
        "column": 32,
        "crystal_structure": "fcc",
        "density": {
            "value": 0.00973,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Dorn",
            "value": 1900
        },
        "electron_config": "Xe 4f[14] 5d[10] 6s[2] 6p[6]",
        "enthalpy": {
            "fusion": {
                "value": 3,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 17,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 0,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "quantum",
        "goldschmidt": "synthetic",
        "group": 18,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 0.00364,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "ionization": {
            "values": [
                10.7485,
                21.4,
                29.4,
                36.9,
                52.9
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "nonmagnetic",
        "molar_volume": {
            "label": "phase-solid",
            "value": 0.0000505,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Radon",
            "de": "Radon",
            "la": "Radon"
        },
        "natural_occurrence": "decay",
        "negativity": {
            "mulliken": 2.59,
            "nagle": 2.27
        },
        "number": 86,
        "oxide_character": "acidic",
        "period": 6,
        "phase": "gas",
        "properties": [
            "natural",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "significantly-radioactive",
        "radius": {
            "calculated": {
                "value": 120,
                "unit": "pm"
            },
            "covalent": {
                "value": 150,
                "unit": "pm"
            },
            "vdw": {
                "value": 220,
                "unit": "pm"
            }
        },
        "set": "noblegas",
        "shell": [
            2,
            8,
            18,
            32,
            18,
            8
        ],
        "superconductivity": "none",
        "symbol": "Rn",
        "temperature": {
            "melting": {
                "value": 202,
                "unit": "K"
            },
            "boiling": {
                "value": 211.5,
                "unit": "K"
            },
            "liquid": {
                "value": 9.5,
                "unit": "K"
            },
            "critical": {
                "value": 377,
                "unit": "K",
                "@": {
                    "value": 6.28,
                    "unit": "MPa"
                }
            }
        },
        "wiki": {
            "en": "Radon",
            "de": "Radon"
        }
    },
    "fr": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "atomic_mass": {
            "value": 223.0197,
            "*": true,
            "unit": "u"
        },
        "block": "s",
        "classification": {
            "cas": [
                {
                    "value": "7440-73-5"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 1,
        "crystal_structure": "bcc",
        "density": {
            "value": 2.9,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Perey",
            "value": 1939
        },
        "electron_config": "Rn 7s[1]",
        "enthalpy": {
            "fusion": {
                "value": 2,
                "*": true,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 65,
                "*": true,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 64,
                "*": true,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "quantum",
        "goldschmidt": "synthetic",
        "group": 1,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 15,
                "*": true,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/0/0b/Pichblende.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Pichblende.jpg\">Template:Farhan</a>, <a href=\"https://creativecommons.org/licenses/by-sa/2.5\">CC BY-SA 2.5</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                4.072741,
                22.4,
                33.5,
                39.1,
                50
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
            "value": 0.000077,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Francium",
            "de": "Francium",
            "la": "Francium"
        },
        "natural_occurrence": "decay",
        "negativity": {
            "pauling": 0.7,
            "allred": 0.86,
            "mulliken": 0.68,
            "nagle": 0.82
        },
        "number": 87,
        "oxidation_state": "+1",
        "oxide_character": "basic",
        "period": 7,
        "phase": "solid",
        "properties": [
            "natural",
            "light",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "highly-radioactive",
        "radius": {
            "covalent": {
                "value": 260,
                "*": true,
                "unit": "pm"
            },
            "vdw": {
                "value": 348,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "alkalimetal",
        "shell": [
            2,
            8,
            18,
            32,
            18,
            8,
            1
        ],
        "standard_potential": {
            "value": -2.92,
            "*": true,
            "unit": "V",
            "info": "Fr[+] + e[-] → Fr"
        },
        "superconductivity": "none",
        "symbol": "Fr",
        "temperature": {
            "melting": {
                "value": 300,
                "unit": "K"
            },
            "boiling": {
                "value": 950,
                "unit": "K"
            },
            "liquid": {
                "value": 650,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Francium",
            "de": "Francium"
        }
    },
    "ra": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "crust": {
                "value": 0.0001,
                "unit": "ppb"
            },
            "water": {
                "value": 1e-8,
                "unit": "ppb"
            },
            "stream": {
                "value": 4e-7,
                "unit": "ppb"
            },
            "human": {
                "value": 0.000001,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery white metallic",
            "de": "silbrig-weiß-metallisch"
        },
        "atomic_mass": {
            "value": 226.0254,
            "*": true,
            "unit": "u"
        },
        "block": "s",
        "classification": {
            "cas": [
                {
                    "value": "7440-14-4"
                }
            ],
            "eg": [
                {
                    "value": "231-122-4"
                }
            ],
            "echa": [
                {
                    "value": "100.028.293"
                }
            ]
        },
        "column": 2,
        "crystal_structure": "bcc",
        "density": {
            "value": 5.5,
            "unit": "g·cm[−3]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "discovery": {
            "by": "Marie und Pierre Curie",
            "value": 1898
        },
        "electrical": {
            "conductivity": {
                "value": 1000000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 0.000001,
                "unit": "Ωm"
            }
        },
        "electron_config": "Rn 7s[2]",
        "enthalpy": {
            "fusion": {
                "value": 8,
                "*": true,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 125,
                "*": true,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 159,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "synthetic",
        "group": 2,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 19,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/b/bb/Radium226.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Radium226.jpg\">grenadier</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                5.2784239,
                10.14718,
                31,
                41,
                52.9
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "nonmagnetic",
        "molar_volume": {
            "value": 0.00004109,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Radium",
            "de": "Radium",
            "la": "Radium"
        },
        "natural_occurrence": "decay",
        "negativity": {
            "pauling": 0.9,
            "allred": 0.97,
            "mulliken": 0.92,
            "nagle": 0.99
        },
        "number": 88,
        "oxidation_state": "2",
        "oxide_character": "basic",
        "period": 7,
        "phase": "solid",
        "properties": [
            "natural",
            "heavy",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "radioactive",
        "radius": {
            "covalent": {
                "value": 221,
                "deviation": 2,
                "unit": "pm"
            },
            "vdw": {
                "value": 283,
                "unit": "pm"
            }
        },
        "set": "alkalineearthmetal",
        "shell": [
            2,
            8,
            18,
            32,
            18,
            8,
            2
        ],
        "standard_potential": {
            "value": -2.916,
            "unit": "V",
            "info": "Ra[2+] + 2e[-] → Ra"
        },
        "superconductivity": "none",
        "symbol": "Ra",
        "temperature": {
            "melting": {
                "value": 973,
                "unit": "K"
            },
            "boiling": {
                "value": 2010,
                "unit": "K"
            },
            "liquid": {
                "value": 1037,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Radium",
            "de": "Radium"
        }
    },
    "ac": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "appearance": {
            "en": "silvery-white, glowing with an eerie blue light; sometimes with a golden cast",
            "de": "silbrig"
        },
        "atomic_mass": {
            "value": 227.0278,
            "*": true,
            "unit": "u"
        },
        "basicity": "moderately-alkaline",
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "7440-34-8"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 3,
        "crystal_structure": "fcc",
        "density": {
            "value": 10.07,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Debierne",
            "value": 1899
        },
        "electron_config": "Rn 6d[1] 7s[2]",
        "enthalpy": {
            "fusion": {
                "value": 14,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 400,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 406,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "classifying",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 12,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/2/27/Actinium_sample_%2831481701837%29.png",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Actinium_sample_(31481701837).png\">Oak Ridge National Laboratory</a>, <a href=\"https://creativecommons.org/licenses/by/2.0\">CC BY 2.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                5.380226,
                11.75,
                17.431,
                44.8,
                55
            ],
            "unit": "eV"
        },
        "molar_volume": {
            "value": 0.00002255,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Actinium",
            "de": "Actinium",
            "la": "Actinium"
        },
        "natural_occurrence": "decay",
        "negativity": {
            "pauling": 1.1,
            "allred": 1,
            "nagle": 1.03
        },
        "number": 89,
        "oxidation_state": "3",
        "oxide_character": "basic",
        "period": 7,
        "phase": "solid",
        "properties": [
            "natural",
            "heavy",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "significantly-radioactive",
        "radius": {
            "covalent": {
                "value": 215,
                "unit": "pm"
            }
        },
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            18,
            9,
            2
        ],
        "standard_potential": {
            "value": -2.13,
            "unit": "V",
            "info": "Ac[3+] + 3e[-] → Ac"
        },
        "superconductivity": "none",
        "symbol": "Ac",
        "temperature": {
            "melting": {
                "value": 1500,
                "unit": "K"
            },
            "boiling": {
                "value": 3500,
                "deviation": 300,
                "unit": "K"
            },
            "liquid": {
                "value": 2000,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Actinium",
            "de": "Actinium"
        }
    },
    "th": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 0.4,
                "unit": "ppb"
            },
            "sun": {
                "value": 0.3,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 40,
                "unit": "ppb"
            },
            "crust": {
                "value": 6000,
                "unit": "ppb"
            },
            "water": {
                "value": 0.00004,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.1,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery",
            "de": "silbrig weiß"
        },
        "atomic_mass": {
            "value": 232.03774,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-29-1"
                }
            ],
            "eg": [
                {
                    "value": "231-139-7"
                }
            ],
            "echa": [
                {
                    "value": "100.028.308"
                }
            ]
        },
        "column": 4,
        "crystal_structure": "fcc",
        "density": {
            "value": 11.724,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Berzelius",
            "value": 1829
        },
        "elastic": {
            "young": {
                "value": 79,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 31,
                "unit": "GPa"
            },
            "bulk": {
                "value": 54,
                "unit": "GPa"
            },
            "poisson": 0.27
        },
        "electrical": {
            "conductivity": {
                "value": 6670000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 1.5e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Rn 6d[2] 7s[2]",
        "enthalpy": {
            "fusion": {
                "value": 16,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 530,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 598,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "revolution",
        "goldschmidt": "lithophile",
        "group": 20,
        "hardness": {
            "mohs": 3,
            "brinell": {
                "value": 400,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 350,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 54,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.000011,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/1/13/Thorium_sample_0.1g.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Thorium_sample_0.1g.jpg\">Alchemist-hp (talk) (www.pse-mendelejew.de)</a>, FAL, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.3067,
                12.1,
                18.32,
                28.648,
                58
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.000132,
            "unit": "cm[3]·mol[−1]",
            "condition": [
                {
                    "value": 293,
                    "unit": "K"
                }
            ]
        },
        "molar_volume": {
            "value": 0.0000198,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Thorium",
            "de": "Thorium",
            "la": "Thorium"
        },
        "natural_occurrence": "decay",
        "negativity": {
            "pauling": 1.3,
            "allred": 1.11,
            "nagle": 1.03
        },
        "number": 90,
        "oxidation_state": "4, 3, 2",
        "oxide_character": "basic",
        "period": 7,
        "phase": "solid",
        "price": {
            "value": 287,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "mononuclidic",
            "heavy",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "slightly-radioactive",
        "radius": {
            "empirical": {
                "value": 180,
                "unit": "pm"
            },
            "covalent": {
                "value": 206,
                "deviation": 6,
                "unit": "pm"
            }
        },
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            18,
            10,
            2
        ],
        "sound_speed": {
            "value": 2490,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_atomic_weight": {
            "value": 232.0377,
            "deviation": 0.0004
        },
        "superconductivity": "normal",
        "symbol": "Th",
        "temperature": {
            "melting": {
                "value": 2023,
                "unit": "K"
            },
            "boiling": {
                "value": 5061,
                "unit": "K"
            },
            "liquid": {
                "value": 3038,
                "unit": "K"
            },
            "transition": {
                "value": 1.4,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Thorium",
            "de": "Thorium"
        }
    },
    "pa": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "crust": {
                "value": 0.00001,
                "unit": "ppb"
            },
            "water": {
                "value": 2e-16,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "bright, silvery metallic luster",
            "de": "hell, silbrig, metallisch glänzend"
        },
        "atomic_mass": {
            "value": 231.035882,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-13-3"
                }
            ],
            "eg": [
                {
                    "value": "616-087-9"
                }
            ],
            "echa": [
                {
                    "value": "100.122.906"
                }
            ]
        },
        "column": 5,
        "crystal_structure": "tetr",
        "density": {
            "value": 15.37,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Fajans, Hahn, Meitner",
            "value": 1917
        },
        "electrical": {
            "conductivity": {
                "value": 5560000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 1.8e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Rn 5f[2] 6d[1] 7s[2]",
        "enthalpy": {
            "fusion": {
                "value": 15,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 470,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 607,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "quantum",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 47,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/a/af/Protactinium-233.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Protactinium-233.jpg\">ENERGY.GOV</a>, Public domain, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                5.89,
                11.9,
                18.6,
                30.9,
                44.3
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
            "value": 0.00001518,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Protactinium",
            "de": "Protactinium",
            "la": "Protactinium"
        },
        "natural_occurrence": "decay",
        "negativity": {
            "pauling": 1.5,
            "allred": 1.14,
            "nagle": 1.08
        },
        "number": 91,
        "oxidation_state": "5",
        "oxide_character": "basic",
        "period": 7,
        "phase": "solid",
        "properties": [
            "natural",
            "heavy",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "radioactive",
        "radius": {
            "empirical": {
                "value": 163,
                "unit": "pm"
            },
            "covalent": {
                "value": 200,
                "unit": "pm"
            }
        },
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            20,
            9,
            2
        ],
        "standard_atomic_weight": {
            "value": 231.03588,
            "deviation": 0.00001
        },
        "superconductivity": "normal",
        "symbol": "Pa",
        "temperature": {
            "melting": {
                "value": 1841,
                "unit": "K"
            },
            "boiling": {
                "value": 4300,
                "unit": "K"
            },
            "liquid": {
                "value": 2459,
                "unit": "K"
            },
            "transition": {
                "value": 1.4,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Protactinium",
            "de": "Protactinium"
        }
    },
    "u": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "abundance": {
            "universe": {
                "value": 0.2,
                "unit": "ppb"
            },
            "sun": {
                "value": 1,
                "unit": "ppb"
            },
            "meteorite": {
                "value": 10,
                "unit": "ppb"
            },
            "crust": {
                "value": 1800,
                "unit": "ppb"
            },
            "water": {
                "value": 3.3,
                "unit": "ppb"
            },
            "stream": {
                "value": 0.04,
                "unit": "ppb"
            },
            "human": {
                "value": 1,
                "unit": "ppb"
            }
        },
        "appearance": {
            "en": "silvery gray metallic; corrodes to a spalling black oxide coat in air",
            "de": "silberweiß"
        },
        "atomic_mass": {
            "value": 238.028913,
            "unit": "u"
        },
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-61-1"
                }
            ],
            "eg": [
                {
                    "value": "231-170-6"
                }
            ],
            "echa": [
                {
                    "value": "100.028.336"
                }
            ]
        },
        "column": 6,
        "crystal_structure": "orth",
        "density": {
            "value": 19.16,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Klaproth",
            "value": 1789
        },
        "elastic": {
            "young": {
                "value": 208,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 111,
                "unit": "GPa"
            },
            "bulk": {
                "value": 100,
                "unit": "GPa"
            },
            "poisson": 0.23
        },
        "electrical": {
            "conductivity": {
                "value": 3240000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 2.8e-7,
                "unit": "Ωm"
            }
        },
        "electron_config": "Rn 5f[3] 6d[1] 7s[2]",
        "enthalpy": {
            "fusion": {
                "value": 14,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 420,
                "unit": "kJ·mol[-1]"
            },
            "atomisation": {
                "value": 536,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "enlightenment",
        "goldschmidt": "lithophile",
        "group": 20,
        "hardness": {
            "mohs": 6,
            "brinell": {
                "value": 2400,
                "unit": "NM·m[-2]"
            },
            "vickers": {
                "value": 1960,
                "unit": "NM·m[-2]"
            }
        },
        "hazard": {
            "h": [
                "330",
                "300",
                "373",
                "413"
            ],
            "p": [
                "?"
            ],
            "hazard": [
                "T",
                "X"
            ],
            "ghs": [
                "06",
                "08"
            ],
            "adr": [
                "6.1",
                "7B"
            ],
            "nfpa": {
                "h": "0",
                "f": "4",
                "i": "1",
                "s": "RAD"
            }
        },
        "heat": {
            "heat_capacity": {
                "value": 116,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 27.6,
                "unit": "W·m[-1]·K[-1]"
            },
            "thermal_expansion": {
                "value": 0.0000139,
                "unit": "K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/c/c3/Vacuum_capacitor_with_uranium_glass.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Vacuum_capacitor_with_uranium_glass.jpg\">Warut Roonguthai</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\">CC BY-SA 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.19405,
                11.6,
                19.8,
                36.7,
                46
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
            "value": 0.00001249,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Uranium",
            "de": "Uran",
            "la": "Uranium"
        },
        "natural_occurrence": "primordial",
        "negativity": {
            "pauling": 1.38,
            "allred": 1.22,
            "nagle": 1.06
        },
        "number": 92,
        "oxidation_state": "+3, +4, +5, '''+6'''",
        "oxide_character": "basic",
        "period": 7,
        "phase": "solid",
        "price": {
            "value": 101,
            "unit": "USD"
        },
        "properties": [
            "natural",
            "heavy",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "slightly-radioactive",
        "radius": {
            "empirical": {
                "value": 156,
                "unit": "pm"
            },
            "covalent": {
                "value": 196,
                "deviation": 7,
                "unit": "pm"
            },
            "vdw": {
                "value": 186,
                "unit": "pm"
            }
        },
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            21,
            9,
            2
        ],
        "sound_speed": {
            "value": 3155,
            "unit": "m·s[−1]"
        },
        "standard_atomic_weight": {
            "value": 238.02891,
            "deviation": 0.00003
        },
        "standard_potential": {
            "value": -1.66,
            "unit": "V",
            "info": "U[3+] + 3e[-] → U"
        },
        "superconductivity": "normal",
        "symbol": "U",
        "temperature": {
            "melting": {
                "value": 1405.3,
                "unit": "K"
            },
            "boiling": {
                "value": 4404,
                "unit": "K"
            },
            "liquid": {
                "value": 2998.7,
                "unit": "K"
            },
            "transition": {
                "value": 1.3,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Uranium",
            "de": "Uran"
        }
    },
    "np": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "appearance": {
            "en": "silvery metallic",
            "de": "silbrig"
        },
        "atomic_mass": {
            "value": 237.0482,
            "*": true,
            "unit": "u"
        },
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7439-99-8"
                }
            ],
            "eg": [
                {
                    "value": "231-108-8"
                }
            ],
            "echa": [
                {
                    "value": "100.028.280"
                }
            ]
        },
        "column": 7,
        "crystal_structure": "orth",
        "density": {
            "value": 20.45,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "McMillan, Abelson",
            "value": 1940
        },
        "electrical": {
            "conductivity": {
                "value": 820000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 0.0000012,
                "unit": "Ωm"
            }
        },
        "electron_config": "Rn 5f[4] 6d[1] 7s[2]",
        "enthalpy": {
            "fusion": {
                "value": 10,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 335,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "quantum",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 6.3,
                "unit": "W·m[-1]·K[-1]",
                "condition": [
                    {
                        "value": 300,
                        "unit": "K"
                    }
                ]
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/0/03/Np_sphere.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Np_sphere.jpg\">Los Alamos National Lab.</a>, Public domain, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.26554,
                11.5,
                19.7,
                33.8,
                48
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
            "value": 0.00001159,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Neptunium",
            "de": "Neptunium",
            "la": "Neptunium"
        },
        "natural_occurrence": "decay",
        "negativity": {
            "pauling": 1.36,
            "allred": 1.22,
            "nagle": 1.09
        },
        "number": 93,
        "oxidation_state": "+3, +4, '''+5''', +6, +7",
        "oxide_character": "basic",
        "period": 7,
        "phase": "solid",
        "price": {
            "value": 660000,
            "unit": "USD"
        },
        "properties": [
            "heavy",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "slightly-radioactive",
        "radius": {
            "empirical": {
                "value": 155,
                "unit": "pm"
            },
            "covalent": {
                "value": 190,
                "deviation": 1,
                "unit": "pm"
            }
        },
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            22,
            9,
            2
        ],
        "standard_potential": {
            "value": -1.79,
            "unit": "V",
            "info": "Np[3+] + 3e[-] → Np"
        },
        "superconductivity": "none",
        "symbol": "Np",
        "temperature": {
            "melting": {
                "value": 912,
                "deviation": 3,
                "unit": "K"
            },
            "boiling": {
                "value": 4447,
                "*": true,
                "unit": "K"
            },
            "liquid": {
                "value": 3535,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Neptunium",
            "de": "Neptunium"
        }
    },
    "pu": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "appearance": {
            "en": "silvery white, tarnishing to dark gray in air",
            "de": "silbriges Metall"
        },
        "atomic_mass": {
            "value": 244.0642,
            "*": true,
            "unit": "u"
        },
        "basicity": "amphoterism",
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-07-5"
                }
            ],
            "eg": [
                {
                    "value": "231-117-7"
                }
            ],
            "echa": [
                {
                    "value": "100.028.288"
                }
            ]
        },
        "column": 8,
        "crystal_structure": "mon",
        "density": {
            "value": 19.816,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Seaborg",
            "value": 1940
        },
        "elastic": {
            "young": {
                "value": 96,
                "unit": "GPa"
            },
            "rigidity": {
                "value": 43,
                "unit": "GPa"
            },
            "poisson": 0.21
        },
        "electrical": {
            "conductivity": {
                "value": 680000,
                "unit": "S·m[-1]"
            },
            "resistivity": {
                "value": 0.0000015,
                "unit": "Ωm"
            }
        },
        "electron_config": "Rn 5f[6] 7s[2]",
        "enthalpy": {
            "fusion": {
                "value": 2.8,
                "unit": "kJ·mol[-1]"
            },
            "vaporisation": {
                "value": 325,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "quantum",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "heat_capacity": {
                "value": 130,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 6.74,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/0/0f/Plutonium_ring.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Plutonium_ring.jpg\">Los Alamos National Laboratory</a>, Attribution, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.02576,
                11.5,
                21.1,
                35,
                49
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
            "value": 0.00001229,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Plutonium",
            "de": "Plutonium",
            "la": "Plutonium"
        },
        "natural_occurrence": "decay",
        "negativity": {
            "pauling": 1.28,
            "allred": 1.22,
            "nagle": 1.09
        },
        "number": 94,
        "oxidation_state": "+3, '''+4''', +5, +6, (+7)",
        "oxide_character": "basic",
        "period": 7,
        "phase": "solid",
        "properties": [
            "natural",
            "mononuclidic",
            "heavy",
            "radioactive",
            "artificial"
        ],
        "radioactive": true,
        "radioactivity": "slightly-radioactive",
        "radius": {
            "empirical": {
                "value": 159,
                "unit": "pm"
            },
            "covalent": {
                "value": 187,
                "deviation": 1,
                "unit": "pm"
            }
        },
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            24,
            8,
            2
        ],
        "sound_speed": {
            "value": 2260,
            "unit": "m·s[−1]",
            "condition": [
                {
                    "value": 293.15,
                    "unit": "K"
                }
            ]
        },
        "standard_potential": {
            "value": -2.031,
            "unit": "V",
            "info": "Pu[3+] + 3e[-] → Pu"
        },
        "superconductivity": "none",
        "symbol": "Pu",
        "temperature": {
            "melting": {
                "value": 912.5,
                "unit": "K"
            },
            "boiling": {
                "value": 3505,
                "unit": "K"
            },
            "liquid": {
                "value": 2592.5,
                "unit": "K"
            }
        },
        "toxicity": [
            {
                "type": "LD{50}",
                "organism": "dog",
                "application": "#",
                "value": {
                    "value": 0.32,
                    "unit": "mg·kg[-1]"
                }
            },
            {
                "type": "LD{50}",
                "organism": "human",
                "application": "#",
                "value": {
                    "value": null,
                    "range": [
                        10,
                        99
                    ],
                    "*": true,
                    "unit": "mg·kg[-1]"
                }
            }
        ],
        "wiki": {
            "en": "Plutonium",
            "de": "Plutonium"
        }
    },
    "am": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "appearance": {
            "en": "silvery white",
            "de": "silbrig-weißes Metall"
        },
        "atomic_mass": {
            "value": 243.061375,
            "*": true,
            "unit": "u"
        },
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-35-9"
                }
            ],
            "eg": [
                {
                    "value": "231-144-4"
                }
            ],
            "echa": [
                {
                    "value": "100.028.313"
                }
            ]
        },
        "column": 9,
        "crystal_structure": "dhcp",
        "density": {
            "value": 13.67,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Seaborg",
            "value": 1944
        },
        "electrical": {
            "conductivity": {
                "value": 147000000,
                "unit": "S·m[-1]"
            }
        },
        "electron_config": "Rn 5f[7] 7s[2]",
        "era": "quantum",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "heat_capacity": {
                "value": 0.11,
                "unit": "J·kg[−1]·K[−1]"
            },
            "thermal_conductivity": {
                "value": 10,
                "unit": "W·m[-1]·K[-1]",
                "condition": [
                    {
                        "value": 300,
                        "unit": "K"
                    }
                ]
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/e/ee/Americium_microscope.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Americium_microscope.jpg\">Bionerd</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\">CC BY 3.0</a>, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                5.97381,
                11.7,
                21.7,
                36.8,
                50
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "magnetic_susceptibility": {
            "value": 0.001,
            "unit": "cm[3]·mol[−1]"
        },
        "molar_volume": {
            "value": 0.00001778,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Americium",
            "de": "Americium",
            "la": "Americium"
        },
        "natural_occurrence": "synthetic",
        "negativity": {
            "pauling": 1.3,
            "allred": 1.2,
            "nagle": 1.1
        },
        "number": 95,
        "oxidation_state": "+2, '''+3''', +4, +5, +6, (+7)",
        "oxide_character": "basic",
        "period": 7,
        "phase": "solid",
        "properties": [
            "heavy",
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "radioactive",
        "radius": {
            "empirical": {
                "value": 173,
                "unit": "pm"
            },
            "covalent": {
                "value": 180,
                "deviation": 6,
                "unit": "pm"
            }
        },
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            25,
            8,
            2
        ],
        "standard_potential": {
            "value": -2.07,
            "unit": "V",
            "info": "Am[3+] + 3e[-] → Am"
        },
        "superconductivity": "normal",
        "symbol": "Am",
        "temperature": {
            "melting": {
                "value": 1449,
                "unit": "K"
            },
            "boiling": {
                "value": 2880,
                "unit": "K"
            },
            "liquid": {
                "value": 1431,
                "*": true,
                "unit": "K"
            },
            "transition": {
                "value": 1,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Americium",
            "de": "Americium"
        }
    },
    "cm": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "appearance": {
            "en": "silvery metallic, glows purple in the dark",
            "de": "silbrig-weißes Metall"
        },
        "atomic_mass": {
            "value": 247.0703,
            "*": true,
            "unit": "u"
        },
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-51-9"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 10,
        "crystal_structure": "dhcp",
        "density": {
            "value": 13.51,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Seaborg",
            "value": 1944
        },
        "electron_config": "Rn 5f[7] 6d[1] 7s[2]",
        "enthalpy": {
            "vaporisation": {
                "value": 320,
                "*": true,
                "unit": "kJ·mol[-1]"
            }
        },
        "era": "quantum",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 10,
                "unit": "W·m[-1]·K[-1]",
                "condition": [
                    {
                        "value": 300,
                        "unit": "K"
                    }
                ]
            }
        },
        "ionization": {
            "values": [
                5.99141,
                12.4,
                20.1,
                37.7,
                51
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "antiferromagnetic",
        "molar_volume": {
            "value": 0.00001805,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Curium",
            "de": "Curium",
            "la": "Curium"
        },
        "natural_occurrence": "synthetic",
        "negativity": {
            "pauling": 1.3,
            "allred": 1.2,
            "nagle": 1.11
        },
        "number": 96,
        "oxidation_state": "(+2), '''+3''', +4",
        "oxide_character": "basic",
        "period": 7,
        "phase": "solid",
        "properties": [
            "heavy",
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "slightly-radioactive",
        "radius": {
            "empirical": {
                "value": 174,
                "unit": "pm"
            },
            "covalent": {
                "value": 169,
                "deviation": 3,
                "unit": "pm"
            }
        },
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            25,
            9,
            2
        ],
        "standard_potential": {
            "value": -2.06,
            "unit": "V",
            "info": "Cm[3+] + 3e[-] → Cm"
        },
        "superconductivity": "none",
        "symbol": "Cm",
        "temperature": {
            "melting": {
                "value": 1613,
                "unit": "K"
            },
            "boiling": {
                "value": 3383,
                "unit": "K"
            },
            "liquid": {
                "value": 1770,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Curium",
            "de": "Curium"
        }
    },
    "bk": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "appearance": {
            "en": "silvery",
            "de": "silberweiß"
        },
        "atomic_mass": {
            "value": 247,
            "*": true,
            "unit": "u"
        },
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-40-6"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 11,
        "crystal_structure": "dhcp",
        "density": {
            "value": 14.78,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Seaborg",
            "value": 1949
        },
        "electron_config": "Rn 5f[9] 7s[2]",
        "era": "quantum",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 10,
                "*": true,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/b/b6/Berkelium_metal.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Berkelium_metal.jpg\">Oak Ridge National Laboratory, US Department of Energy</a>, Public domain, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.19785,
                11.9,
                21.6,
                36,
                56
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
            "value": 0.00001684,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Berkelium",
            "de": "Berkelium",
            "la": "Berkelium"
        },
        "natural_occurrence": "synthetic",
        "negativity": {
            "pauling": 1.3,
            "allred": 1.2,
            "nagle": 1.11
        },
        "number": 97,
        "oxidation_state": "'''+3''', +4",
        "period": 7,
        "phase": "solid",
        "properties": [
            "heavy",
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "radioactive",
        "radius": {
            "empirical": {
                "value": 170,
                "unit": "pm"
            }
        },
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            27,
            8,
            2
        ],
        "standard_potential": {
            "value": -2,
            "unit": "V",
            "info": "Bk[3+] + 3e[-] → Bk"
        },
        "superconductivity": "none",
        "symbol": "Bk",
        "temperature": {
            "melting": {
                "value": 1259,
                "unit": "K"
            },
            "boiling": {
                "value": 2900,
                "unit": "K"
            },
            "liquid": {
                "value": 1641,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Berkelium",
            "de": "Berkelium"
        }
    },
    "cf": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "appearance": {
            "en": "silvery",
            "de": "silbriges Metall"
        },
        "atomic_mass": {
            "value": 251,
            "*": true,
            "unit": "u"
        },
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-71-3"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 12,
        "crystal_structure": "dhcp",
        "density": {
            "value": 15.1,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Seaborg",
            "value": 1950
        },
        "electron_config": "Rn 5f[10] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 10,
                "*": true,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/9/93/Californium.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Californium.jpg\">United States Department of Energy (see File:Einsteinium.jpg)</a>, Public domain, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.28166,
                12,
                22.4,
                37.7,
                51.9
            ],
            "unit": "eV"
        },
        "molar_volume": {
            "value": 0.0000165,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Californium",
            "de": "Californium",
            "la": "Californium"
        },
        "natural_occurrence": "synthetic",
        "negativity": {
            "pauling": 1.3,
            "allred": 1.2,
            "nagle": 1.13
        },
        "number": 98,
        "oxidation_state": "(+2), '''+3''', (+4)",
        "period": 7,
        "phase": "solid",
        "properties": [
            "heavy",
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "radioactive",
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            28,
            8,
            2
        ],
        "standard_potential": {
            "value": -1.91,
            "unit": "V",
            "info": "Cf[3+] + 3e[-] → Cf"
        },
        "superconductivity": "none",
        "symbol": "Cf",
        "temperature": {
            "melting": {
                "value": 1173,
                "unit": "K"
            },
            "boiling": {
                "value": 1743,
                "*": true,
                "unit": "K"
            },
            "liquid": {
                "value": 570,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Californium",
            "de": "Californium"
        }
    },
    "es": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "appearance": {
            "en": "silvery; glows blue in the dark"
        },
        "atomic_mass": {
            "value": 252,
            "*": true,
            "unit": "u"
        },
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7429-92-7"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 13,
        "crystal_structure": "fcc",
        "density": {
            "value": 13.5,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Seaborg",
            "value": 1952
        },
        "electron_config": "Rn 5f[11] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 10,
                "*": true,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "image": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/5/55/Einsteinium.jpg",
            "caption": "<a href=\"https://commons.wikimedia.org/wiki/File:Einsteinium.jpg\">Haire, R. G., US Department of Energy.Touched up by Materialscientist at en.wikipedia.</a>, Public domain, via Wikimedia Commons"
        },
        "ionization": {
            "values": [
                6.36758,
                12.2,
                22.7,
                38.8,
                54.1
            ],
            "unit": "eV"
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
            "value": 0.00002852,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Einsteinium",
            "de": "Einsteinium",
            "la": "Einsteinium"
        },
        "natural_occurrence": "synthetic",
        "negativity": {
            "pauling": 1.3,
            "allred": 1.2,
            "nagle": 1.14
        },
        "number": 99,
        "oxidation_state": "+2, '''+3''', (+4)",
        "period": 7,
        "phase": "solid",
        "properties": [
            "heavy",
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "significantly-radioactive",
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            29,
            8,
            2
        ],
        "superconductivity": "none",
        "symbol": "Es",
        "temperature": {
            "melting": {
                "value": 1133,
                "unit": "K"
            },
            "boiling": {
                "value": 1269,
                "*": true,
                "unit": "K"
            },
            "liquid": {
                "value": 136,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Einsteinium",
            "de": "Einsteinium"
        }
    },
    "fm": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "atomic_mass": {
            "value": 257.0951,
            "*": true,
            "unit": "u"
        },
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-72-4"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 14,
        "crystal_structure": "fcc",
        "discovery": {
            "by": "Seaborg",
            "value": 1952
        },
        "electron_config": "Rn 5f[12] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 10,
                "*": true,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "ionization": {
            "values": [
                6.5,
                12.4,
                23.2,
                39.3,
                55
            ],
            "unit": "eV",
            "*": true
        },
        "names": {
            "en": "Fermium",
            "de": "Fermium",
            "la": "Fermium"
        },
        "natural_occurrence": "synthetic",
        "negativity": {
            "pauling": 1.3,
            "allred": 1.2,
            "nagle": 1.1
        },
        "number": 100,
        "oxidation_state": "+2 +3",
        "period": 7,
        "phase": "solid",
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "significantly-radioactive",
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            30,
            8,
            2
        ],
        "standard_potential": {
            "value": -1.96,
            "unit": "V",
            "info": "Fm[3+] + 3e[-] → Fm"
        },
        "superconductivity": "none",
        "symbol": "Fm",
        "temperature": {
            "melting": {
                "value": 1800,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Fermium",
            "de": "Fermium"
        }
    },
    "md": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "atomic_mass": {
            "value": 258,
            "*": true,
            "unit": "u"
        },
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "7440-11-1"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 15,
        "crystal_structure": "fcc",
        "discovery": {
            "by": "Seaborg",
            "value": 1955
        },
        "electron_config": "Rn 5f[13] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 10,
                "*": true,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "ionization": {
            "values": [
                6.58,
                12.4,
                24.3,
                40,
                54.1
            ],
            "unit": "eV",
            "*": true
        },
        "names": {
            "en": "Mendelevium",
            "de": "Mendelevium",
            "la": "Mendelevium"
        },
        "natural_occurrence": "synthetic",
        "negativity": {
            "pauling": 1.3,
            "allred": 1.2,
            "nagle": 1.17
        },
        "number": 101,
        "oxidation_state": "+2 +3",
        "period": 7,
        "phase": "solid",
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "significantly-radioactive",
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            31,
            8,
            2
        ],
        "superconductivity": "none",
        "symbol": "Md",
        "temperature": {
            "melting": {
                "value": 1100,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Mendelevium",
            "de": "Mendelevium"
        }
    },
    "no": {
        "@modified": "2023-11-04T10:30:10.482Z",
        "atomic_mass": {
            "value": 259,
            "*": true,
            "unit": "u"
        },
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "10028-14-5"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 16,
        "crystal_structure": "fcc",
        "discovery": {
            "by": "Seaborg",
            "value": 1958
        },
        "electron_config": "Rn 5f[14] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 10,
                "*": true,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "ionization": {
            "values": [
                6.62621,
                12.93,
                25.8,
                41.5,
                60
            ],
            "unit": "eV",
            "*": true
        },
        "names": {
            "en": "Nobelium",
            "de": "Nobelium",
            "la": "Nobelium"
        },
        "natural_occurrence": "synthetic",
        "negativity": {
            "pauling": 1.3,
            "allred": 1.2,
            "nagle": 1.18
        },
        "number": 102,
        "oxidation_state": "+2 +3",
        "period": 7,
        "phase": "solid",
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "highly-radioactive",
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            8,
            2
        ],
        "superconductivity": "none",
        "symbol": "No",
        "temperature": {
            "melting": {
                "value": 1100,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Nobelium",
            "de": "Nobelium"
        }
    },
    "lr": {
        "@modified": "2023-10-19T17:18:47.603Z",
        "atomic_mass": {
            "value": 266,
            "*": true,
            "unit": "u"
        },
        "basicity": "slightly-alkaline",
        "block": "f",
        "classification": {
            "cas": [
                {
                    "value": "22537-19-5"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 17,
        "crystal_structure": "hcp",
        "discovery": {
            "by": "Ghiorso",
            "value": 1961
        },
        "electron_config": "Rn 5f[14] 7s[2] 7p[1]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 20,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 10,
                "*": true,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "ionization": {
            "values": [
                4.96,
                14.54,
                21.8,
                43.6,
                56
            ],
            "unit": "eV",
            "*": true
        },
        "names": {
            "en": "Lawrencium",
            "de": "Lawrencium",
            "la": "Lawrencium"
        },
        "natural_occurrence": "synthetic",
        "negativity": {
            "pauling": 1.3
        },
        "number": 103,
        "oxidation_state": "+3",
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        "phase": "solid",
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "highly-radioactive",
        "set": "actinoide",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            8,
            3
        ],
        "superconductivity": "none",
        "symbol": "Lr",
        "temperature": {
            "melting": {
                "value": 1900,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Lawrencium",
            "de": "Lawrencium"
        }
    },
    "rf": {
        "@modified": "2023-10-19T17:18:47.603Z",
        "appearance": {
            "de": "unbekannt, vermutlich silber-weiß oder grau metallisch"
        },
        "atomic_mass": {
            "value": 261.1087,
            "*": true,
            "unit": "u"
        },
        "block": "d",
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            "cas": [
                {
                    "value": "53850-36-5"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 18,
        "crystal_structure": "hcp",
        "density": {
            "value": 17,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Ghiorso",
            "value": 1964
        },
        "electron_config": "Rn 5f[14] 6d[2] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 4,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 23,
                "*": true,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "ionization": {
            "values": [
                6.02,
                14.35,
                23.84,
                31.87,
                64
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.000016,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Rutherfordium",
            "de": "Rutherfordium",
            "la": "Rutherfordium"
        },
        "natural_occurrence": "synthetic",
        "number": 104,
        "period": 7,
        "properties": [
            "heavy",
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "highly-radioactive",
        "radius": {
            "covalent": {
                "value": 157,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            10,
            2
        ],
        "symbol": "Rf",
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            "melting": {
                "value": 2400,
                "*": true,
                "unit": "K"
            },
            "boiling": {
                "value": 5800,
                "*": true,
                "unit": "K"
            },
            "liquid": {
                "value": 3400,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Rutherfordium",
            "de": "Rutherfordium"
        }
    },
    "db": {
        "@modified": "2023-10-19T17:18:47.603Z",
        "atomic_mass": {
            "value": 262.1138,
            "*": true,
            "unit": "u"
        },
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "53850-35-4"
                }
            ],
            "eg": [
                {
                    "value": "611-058-7"
                }
            ],
            "echa": [
                {
                    "value": "100.126.367"
                }
            ]
        },
        "column": 19,
        "crystal_structure": "bcc",
        "density": {
            "value": 21.6,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Ghiorso",
            "value": 1967
        },
        "electron_config": "Rn 5f[14] 6d[3] 7s[2]",
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        "goldschmidt": "synthetic",
        "group": 5,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 58,
                "*": true,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "ionization": {
            "values": [
                6.8,
                14,
                23.1,
                33,
                43
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.000012,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Dubnium",
            "de": "Dubnium",
            "la": "Dubnium"
        },
        "natural_occurrence": "synthetic",
        "number": 105,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "significantly-radioactive",
        "radius": {
            "empirical": {
                "value": 139,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 149,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            11,
            2
        ],
        "symbol": "Db",
        "wiki": {
            "en": "Dubnium",
            "de": "Dubnium"
        }
    },
    "sg": {
        "@modified": "2023-10-19T17:18:47.603Z",
        "atomic_mass": {
            "value": 263.1182,
            "*": true,
            "unit": "u"
        },
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "54038-81-2"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 20,
        "crystal_structure": "bcc",
        "density": {
            "value": 23.2,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Oganessian",
            "value": 1974
        },
        "electron_config": "Rn 5f[14] 6d[4] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 6,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 19,
                "*": true,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "ionization": {
            "values": [
                7.8,
                17.1,
                25.8,
                35.5,
                47.2
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.000012,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Seaborgium",
            "de": "Seaborgium",
            "la": "Seaborgium"
        },
        "natural_occurrence": "synthetic",
        "number": 106,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "highly-radioactive",
        "radius": {
            "empirical": {
                "value": 132,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 143,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            12,
            2
        ],
        "symbol": "Sg",
        "wiki": {
            "en": "Seaborgium",
            "de": "Seaborgium"
        }
    },
    "bh": {
        "@modified": "2023-10-17T15:25:28.382Z",
        "atomic_mass": {
            "value": 262.1229,
            "*": true,
            "unit": "u"
        },
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "54037-14-8"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 21,
        "crystal_structure": "hcp",
        "density": {
            "value": 27.2,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "Oganessian",
            "value": 1976
        },
        "electron_config": "Rn 5f[14] 6d[5] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
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        "hazard": null,
        "ionization": {
            "values": [
                7.7,
                17.5,
                26.7,
                37.3,
                49
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.00001,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Bohrium",
            "de": "Bohrium",
            "la": "Bohrium"
        },
        "natural_occurrence": "synthetic",
        "number": 107,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "highly-radioactive",
        "radius": {
            "empirical": {
                "value": 128,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 141,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            13,
            2
        ],
        "symbol": "Bh",
        "wiki": {
            "en": "Bohrium",
            "de": "Bohrium"
        }
    },
    "hs": {
        "@modified": "2023-10-17T15:25:28.382Z",
        "atomic_mass": {
            "value": 265.269,
            "*": true,
            "unit": "u"
        },
        "block": "d",
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            "cas": [
                {
                    "value": "54037-57-9"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 22,
        "crystal_structure": "hcp",
        "density": {
            "value": 28.6,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "GSI",
            "value": 1984
        },
        "electron_config": "Rn 5f[14] 6d[6] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 8,
        "hazard": null,
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                7.6,
                18.2,
                29.3,
                37.7,
                51.2
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.00001,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Hassium",
            "de": "Hassium",
            "la": "Hassium"
        },
        "natural_occurrence": "synthetic",
        "number": 108,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "highly-radioactive",
        "radius": {
            "empirical": {
                "value": 126,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 134,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "transitionmetal",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            14,
            2
        ],
        "symbol": "Hs",
        "wiki": {
            "en": "Hassium",
            "de": "Hassium"
        }
    },
    "mt": {
        "@modified": "2023-10-29T17:28:32.371Z",
        "atomic_mass": {
            "value": 268,
            "*": true,
            "unit": "u"
        },
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "54038-01-6"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 23,
        "crystal_structure": "fcc",
        "density": {
            "value": 28.2,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "GSI",
            "value": 1982
        },
        "electron_config": "Rn 5f[14] 6d[7] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 9,
        "hazard": null,
        "ionization": {
            "values": [
                8.3
            ],
            "unit": "eV",
            "*": true
        },
        "magnetic_ordering": "paramagnetic",
        "molar_volume": {
            "value": 0.00001,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Meitnerium",
            "de": "Meitnerium",
            "la": "Meitnerium"
        },
        "natural_occurrence": "synthetic",
        "number": 109,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "extremely-radioactive",
        "radius": {
            "empirical": {
                "value": 128,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 129,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "unknown",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            15,
            2
        ],
        "symbol": "Mt",
        "wiki": {
            "en": "Meitnerium",
            "de": "Meitnerium"
        }
    },
    "ds": {
        "@modified": "2023-10-29T17:28:32.371Z",
        "atomic_mass": {
            "value": 281,
            "*": true,
            "unit": "u"
        },
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "54083-77-1"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 24,
        "crystal_structure": "bcc",
        "density": {
            "value": 27.4,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "GSI",
            "value": 1994
        },
        "electron_config": "Rn 5f[14] 6d[8] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 10,
        "hazard": null,
        "ionization": {
            "values": [
                9.9
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.00001,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Darmstadtium",
            "de": "Darmstadtium",
            "la": "Darmstadtium"
        },
        "natural_occurrence": "synthetic",
        "number": 110,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "extremely-radioactive",
        "radius": {
            "empirical": {
                "value": 132,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 128,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "unknown",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            16,
            2
        ],
        "symbol": "Ds",
        "wiki": {
            "en": "Darmstadtium",
            "de": "Darmstadtium"
        }
    },
    "rg": {
        "@modified": "2023-10-29T17:28:32.371Z",
        "atomic_mass": {
            "value": 280,
            "*": true,
            "unit": "u"
        },
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "54386-24-2"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 25,
        "crystal_structure": "bcc",
        "density": {
            "value": 24.4,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "GSI",
            "value": 1994
        },
        "electron_config": "Rn 5f[14] 6d[9] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 11,
        "hazard": null,
        "ionization": {
            "values": [
                10.6
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.000012,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Roentgenium",
            "de": "Roentgenium",
            "la": "Roentgenium"
        },
        "natural_occurrence": "synthetic",
        "number": 111,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "extremely-radioactive",
        "radius": {
            "empirical": {
                "value": 138,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 121,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "unknown",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            17,
            2
        ],
        "symbol": "Rg",
        "wiki": {
            "en": "Roentgenium",
            "de": "Roentgenium"
        }
    },
    "cn": {
        "@modified": "2023-10-29T17:28:32.371Z",
        "atomic_mass": {
            "value": 277,
            "*": true,
            "unit": "u"
        },
        "block": "d",
        "classification": {
            "cas": [
                {
                    "value": "54084-26-3"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 26,
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        "density": {
            "value": 16.8,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "GSI",
            "value": 1996
        },
        "electron_config": "Rn 5f[14] 6d[10] 7s[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 12,
        "hazard": null,
        "ionization": {
            "values": [
                12
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.000017,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Copernicium",
            "de": "Copernicium",
            "la": "Copernicium"
        },
        "natural_occurrence": "synthetic",
        "number": 112,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
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        "radioactive": true,
        "radioactivity": "extremely-radioactive",
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                "value": 147,
                "*": true,
                "unit": "pm"
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            "covalent": {
                "value": 122,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "unknown",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            18,
            2
        ],
        "symbol": "Cn",
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                "value": 283,
                "deviation": 11,
                "*": true,
                "unit": "K"
            },
            "boiling": {
                "value": 340,
                "deviation": 10,
                "*": true,
                "unit": "K"
            },
            "liquid": {
                "value": 57,
                "*": true,
                "unit": "K"
            },
            "triple": {
                "value": 283,
                "*": true,
                "unit": "K",
                "@": {
                    "value": 25,
                    "unit": "kPa"
                }
            }
        },
        "wiki": {
            "en": "Copernicium",
            "de": "Copernicium"
        }
    },
    "nh": {
        "@modified": "2023-10-29T17:28:32.371Z",
        "atomic_mass": {
            "value": 287,
            "*": true,
            "unit": "u"
        },
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            "cas": [
                {
                    "value": "54084-70-7"
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            ],
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            "echa": null
        },
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        "crystal_structure": "hcp",
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            "value": 16,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "JINR",
            "value": 2006
        },
        "electron_config": "Rn 5f[14] 6d[10] 7s[2] 7p[1]",
        "era": "recent",
        "goldschmidt": "synthetic",
        "group": 13,
        "hazard": null,
        "ionization": {
            "values": [
                7.31
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.000018,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Nihonium",
            "de": "Nihonium",
            "la": "Nihonium"
        },
        "natural_occurrence": "synthetic",
        "number": 113,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "extremely-radioactive",
        "radius": {
            "empirical": {
                "value": 170,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 176,
                "deviation": 4,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "unknown",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            18,
            3
        ],
        "symbol": "Nh",
        "temperature": {
            "melting": {
                "value": 700,
                "*": true,
                "unit": "K"
            },
            "boiling": {
                "value": 1430,
                "*": true,
                "unit": "K"
            },
            "liquid": {
                "value": 730,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Nihonium",
            "de": "Nihonium"
        }
    },
    "fl": {
        "@modified": "2023-10-29T17:28:32.371Z",
        "atomic_mass": {
            "value": 289,
            "*": true,
            "unit": "u"
        },
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "54085-16-4"
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            ],
            "eg": null,
            "echa": null
        },
        "column": 28,
        "crystal_structure": "fcc",
        "density": {
            "value": 14,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "JINR",
            "value": 1999
        },
        "electron_config": "Rn 5f[14] 6d[10] 7s[2] 7p[2]",
        "era": "synthesis",
        "goldschmidt": "synthetic",
        "group": 14,
        "hazard": null,
        "ionization": {
            "values": [
                8.54
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.000021,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Flerovium",
            "de": "Flerovium",
            "la": "Flerovium"
        },
        "natural_occurrence": "synthetic",
        "number": 114,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "extremely-radioactive",
        "radius": {
            "empirical": {
                "value": 180,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 174,
                "deviation": 3,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "unknown",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            18,
            4
        ],
        "symbol": "Fl",
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            "melting": {
                "value": 284,
                "deviation": 50,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Flerovium",
            "de": "Flerovium"
        }
    },
    "mc": {
        "@modified": "2023-10-29T17:28:32.371Z",
        "atomic_mass": {
            "value": 288,
            "*": true,
            "unit": "u"
        },
        "block": "p",
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            "cas": [
                {
                    "value": "54085-64-2"
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            "echa": null
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        "density": {
            "value": 13,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "JINR",
            "value": 2006
        },
        "electron_config": "Rn 5f[14] 6d[10] 7s[2] 7p[3]",
        "era": "recent",
        "goldschmidt": "synthetic",
        "group": 15,
        "hazard": null,
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            "values": [
                5.57
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.000022,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Moscovium",
            "de": "Moscovium",
            "la": "Moscovium"
        },
        "natural_occurrence": "synthetic",
        "number": 115,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "extremely-radioactive",
        "radius": {
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                "value": 187,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 157,
                "deviation": 1,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "unknown",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            18,
            5
        ],
        "symbol": "Mc",
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            "melting": {
                "value": 670,
                "*": true,
                "unit": "K"
            },
            "boiling": {
                "value": 1400,
                "*": true,
                "unit": "K"
            },
            "liquid": {
                "value": 730,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Moscovium",
            "de": "Moscovium"
        }
    },
    "lv": {
        "@modified": "2023-10-29T17:28:32.371Z",
        "atomic_mass": {
            "value": 293,
            "*": true,
            "unit": "u"
        },
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                {
                    "value": "54100-71-9"
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            "echa": null
        },
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        "density": {
            "value": 11.2,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "JINR",
            "value": 2000
        },
        "electron_config": "Rn 5f[14] 6d[10] 7s[2] 7p[4]",
        "era": "recent",
        "goldschmidt": "synthetic",
        "group": 16,
        "hazard": null,
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            "values": [
                7.5
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.000026,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Livermorium",
            "de": "Livermorium",
            "la": "Livermorium"
        },
        "natural_occurrence": "synthetic",
        "number": 116,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "extremely-radioactive",
        "radius": {
            "empirical": {
                "value": 183,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 164,
                "deviation": 2,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "unknown",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            18,
            6
        ],
        "symbol": "Lv",
        "temperature": {
            "melting": {
                "value": 708.5,
                "*": true,
                "unit": "K",
                "range": [
                    637,
                    780
                ]
            },
            "boiling": {
                "value": 1085,
                "*": true,
                "unit": "K",
                "range": [
                    1035,
                    1135
                ]
            },
            "liquid": {
                "value": 376.5,
                "*": true,
                "unit": "K",
                "range": [
                    255,
                    498
                ]
            }
        },
        "wiki": {
            "en": "Livermorium",
            "de": "Livermorium"
        }
    },
    "ts": {
        "@modified": "2023-10-29T17:28:32.371Z",
        "appearance": {
            "en": "semimetallic (predicted)"
        },
        "atomic_mass": {
            "value": 292,
            "*": true,
            "unit": "u"
        },
        "block": "p",
        "classification": {
            "cas": [
                {
                    "value": "54101-14-3"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 31,
        "density": {
            "value": 7.2,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "JINR",
            "value": 2010
        },
        "electron_config": "Rn 5f[14] 6d[10] 7s[2] 7p[5]",
        "era": "recent",
        "goldschmidt": "synthetic",
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        "hazard": null,
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            "values": [
                7.7
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.000041,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Tennessine",
            "de": "Tenness",
            "la": "Tennessum"
        },
        "natural_occurrence": "synthetic",
        "number": 117,
        "period": 7,
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "extremely-radioactive",
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            "empirical": {
                "value": 138,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 156,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "unknown",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            18,
            7
        ],
        "symbol": "Ts",
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            "melting": {
                "value": 723,
                "*": true,
                "unit": "K",
                "range": [
                    623,
                    823
                ]
            },
            "boiling": {
                "value": 883,
                "*": true,
                "unit": "K"
            },
            "liquid": {
                "value": 160,
                "*": true,
                "unit": "K",
                "range": [
                    60,
                    260
                ]
            }
        },
        "wiki": {
            "en": "Tennessine",
            "de": "Tenness"
        }
    },
    "og": {
        "@modified": "2023-10-29T17:28:32.371Z",
        "appearance": {
            "en": "metallic (predicted)"
        },
        "atomic_mass": {
            "value": 294,
            "*": true,
            "unit": "u"
        },
        "block": "p",
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            "cas": [
                {
                    "value": "54144-19-3"
                }
            ],
            "eg": null,
            "echa": null
        },
        "column": 32,
        "crystal_structure": "fcc",
        "density": {
            "value": 5.7,
            "*": true,
            "unit": "g·cm[−3]"
        },
        "discovery": {
            "by": "JINR",
            "value": 2006
        },
        "electron_config": "Rn 5f[14] 6d[10] 7s[2] 7p[6]",
        "era": "recent",
        "goldschmidt": "synthetic",
        "group": 18,
        "hazard": null,
        "heat": {
            "thermal_conductivity": {
                "value": 0.0023,
                "*": true,
                "unit": "W·m[-1]·K[-1]"
            }
        },
        "ionization": {
            "values": [
                8.7
            ],
            "unit": "eV",
            "*": true
        },
        "molar_volume": {
            "value": 0.000052,
            "*": true,
            "unit": "m[3]·mol[−1]"
        },
        "names": {
            "en": "Oganesson",
            "de": "Oganesson",
            "la": "Oganesson"
        },
        "natural_occurrence": "synthetic",
        "number": 118,
        "period": 7,
        "phase": "solid",
        "properties": [
            "radioactive",
            "artificial",
            "synthetic"
        ],
        "radioactive": true,
        "radioactivity": "extremely-radioactive",
        "radius": {
            "empirical": {
                "value": 152,
                "*": true,
                "unit": "pm"
            },
            "covalent": {
                "value": 157,
                "*": true,
                "unit": "pm"
            }
        },
        "set": "unknown",
        "shell": [
            2,
            8,
            18,
            32,
            32,
            18,
            8
        ],
        "symbol": "Og",
        "temperature": {
            "melting": {
                "value": 325,
                "deviation": 15,
                "*": true,
                "unit": "K"
            },
            "boiling": {
                "value": 450,
                "deviation": 10,
                "*": true,
                "unit": "K"
            },
            "liquid": {
                "value": 125,
                "*": true,
                "unit": "K"
            }
        },
        "wiki": {
            "en": "Oganesson",
            "de": "Oganesson"
        }
    }
}
