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Rhodium (Rh)
Atomic number 45 · transition
| Atomic number | 45 |
|---|---|
| Atomic mass | 102.9055 u |
| Molar mass | 102.9055 g/mol |
| Category | transition |
| Group / period / block | 9 / 5 / d |
| Electron configuration | [Kr] 4d8 5s |
| Electrons per shell | 2, 8, 18, 16, 1 |
| Electronegativity (Pauling) | 2.28 |
| Atomic radius | 135.0 pm |
| Density | 12.4 g/cm³ |
| First ionisation energy | 7.4589 eV |
| Melting point | 2236.15 K (1963.00 °C) |
| Boiling point | 3968.15 K (3695.00 °C) |
| Common oxidation states | +3 |
| Abundance in Earth's crust | 0.001 ppm |
Uses
Car catalytic converters, jewellery plating
Discovery
1803, William Wollaston