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 |