Gold

Symbol | Au
Latin name | Aurum
Atomic number | 79
Period | 6
Element category | Transition elements
Relative atomic mass | 196.96654
Group | I.B
Electronegativity | 2.4
Oxidation numbers | 1, 3
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s1
Density [g/cm3] | 19.32
State | Solid
Melting point [°C] | 1064.43
Boiling point [°C] | 2966
Atomic radius [pm] | 174
Covalent radius [pm] | 144
Thermal conductivity [W m-1K-1] | 317
Heat capacity [J K-1g-1] | 0.128
Discovery | Antiquity
Hardness [Mohs scale] | 2.5
Vickers hardness [MPa] | 216
Brinell hardness [MPa] | 2450
Young's modulus [GPa] | 78
Electrical conductivity [S m-1] | 4.5 · 107
Electrical resistivity [10-6Ω.m] | 0.022
Shear modulus [GPa] | 27
1.st ionization energy [eV] | 9.2257
2.nd ionization energy [eV] | 20.521
Stable isotopes | 1
Unstable isotopes | 20