Symbol: Au
Atomic Number: 79
Atomic Weight: 196.96654
Element Classification: Transition Metal
Discovered By: Known to the ancients.
Discovery Date: n/a (Unknown)
Name Origin: Anglo-Saxon: geolo (yellow); symbol from Latin: aurum (shining dawn).
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
Thermal Conductivity (@25°C W/m K):
Debye Temperature (K): 170.00
Pauling Negativity Number: 2.54
First Ionizing Energy (kJ/mol): 889.3
Oxidation States: 3, 1
Electronic Configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s¹
Lattice Structure: Face-Centered Cubic (FCC)
Lattice Constant (Å): 4.080
Lattice C/A Ratio: n/a