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< Back Lead  SEE PERIODIC TABLE   SEE FULL ARTICLE Atomic Number 82 Atomic Symbol Pb Atomic Weight 207.2 amu Group Other Metals, 14 Form Solid Density @ STP 11.3 g/cm3 Melting Point 327.46 °C (621.43 °F, 600.61 °K) Boiling Point 1749 °C (3180.2 °F, 2022.15 °K) Heat of Fusion 4.77 kJ/mol Heat of Vaporization 179.5 kJ/mol First Ionization Potential 7.41666 eV Electronegativity (on Pauling scale) 1.8 Specific Heat Capacity 0.129 J/g K Ground State Electron Configuration 5d10 6s2 6p2 Oxidation States +2, +4 Stable Isotopes and Natural Abundance on Earth 204Pb, 1.4%; 206Pb, 24.1%; 207Pb, 22.1%; 208Pb, 52.4% Selected Radioisotopes 203Pb, 210Pb, 212Pb Atomic Radius 154 pm Crystal Structure Cubic

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