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< Back Mercury  SEE PERIODIC TABLE   SEE FULL ARTICLE Atomic Number 80 Atomic Symbol Hg Atomic Weight 200.59 amu Group Transition, 13 Form Liquid Density @ STP 13.5336 g/cm3 Melting Point -38.83 °C (-37.89 °F, 234.32 °K) Boiling Point 356.73 °C (674.11 °F, 629.88 °K) Heat of Fusion 2.29 kJ/mol Heat of Vaporization 59.2 kJ/mol First Ionization Potential 10.43750 eV Electronegativity (on Pauling scale) 1.9 Specific Heat Capacity 0.140 J/g K Ground State Electron Configuration 5d10 6s2 Oxidation States +1, +2 Stable Isotopes and Natural Abundance on Earth 196Hg, 0.15%; 198Hg, 9.97%; 199Hg, 16.87%; 200Hg, 23.10%; 201Hg, 13.18%; 202Hg, 29.86%; 204Hg, 6.87% Selected Radioisotopes 194Hg, 197Hg Atomic Radius 171 pm Crystal Structure Rhombohedral

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