There are 36 known isotopes of gold ranging from Au-170 to Au-205. There is only one stable isotope of gold: Au-197. Gold-198, with a half-life of 2.7 days, has been used to treat cancer and other illnesses. Density (g/cc): 19.3 Melting Point (°K): 1337.58 Boiling Point (°K): 3080 Appearance: soft, malleable, yellow metal Atomic Radius (pm): 146 Atomic Volume (cc/mol): 10.2 Covalent Radius (pm): 134 Ionic Radius: 85 (+3e) 137 (+1e) Specific Heat (@20°C J/g mol): 0.129 Fusion Heat (kJ/mol): 12.68 Evaporation Heat (kJ/mol): ~340 Debye Temperature (°K): 170.00 Pauling Negativity Number: 2.54 First Ionizing Energy (kJ/mol): 889.3 Oxidation States: 3, 1. The oxidation states -1, +2 and +5 exist but are rare. Lattice Structure: Face-Centered Cubic (FCC) Lattice Constant (Å): 4.080 Specific Gravity (20°C): 18.88 CAS Registry Number: 7440-57-5
Posted on: Wed, 11 Sep 2013 05:41:50 +0000
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