Rhodium

Symbol | Rh
Latin name | Rhodium
Atomic number | 45
Period | 5
Element category | Transition elements
Relative atomic mass | 102.90550
Group | VIII.B
Electronegativity | 2.2
Oxidation numbers | 2, 3, 4, 5
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d8 5s1
Density [g/cm3] | 12.45
State | Solid
Melting point [°C] | 1963
Boiling point [°C] | 3800
Atomic radius [pm] | 173
Covalent radius [pm] | 135
Thermal conductivity [W m-1K-1] | 150
Heat capacity [J K-1g-1] | 0.242
Discovery | 1803
Hardness [Mohs scale] | 6.0
Vickers hardness [MPa] | 1246
Brinell hardness [MPa] | 1100
Young's modulus [GPa] | 275
Electrical conductivity [S m-1] | 2.3 · 107
Shear modulus [GPa] | 150
1.st ionization energy [eV] | 7.4589
2.nd ionization energy [eV] | 18.08
3.rd ionization energy [eV] | 31.06
Stable isotopes | 1
Unstable isotopes | 19