Rhodium (Rh)
Rhodium (Rh) is element 45 of the periodic table, a transition metal in period 5 and group 9. Its standard atomic weight is 102.90549, so one mole of rhodium atoms has a mass of 102.90549 g. At room temperature it is a solid; it melts at 1963.85 °C and boils at 3694.85 °C.
| Atomic number | 45 |
|---|---|
| Symbol | Rh |
| Standard atomic weight | 102.90549 |
| Molar mass | 102.90549 g/mol |
| Category | Transition metal |
| Group | 9 |
| Period | 5 |
| Block | d-block |
| Electron configuration | [Kr] 5s1 4d8 |
| Oxidation states | +3 |
| Electronegativity (Pauling) | 2.28 |
| Atomic radius (van der Waals) | 195 pm |
| First ionisation energy | 7.459 eV (719.7 kJ/mol) |
| Electron affinity | 1.137 eV |
| State at room temperature | Solid |
| Melting point | 2237 K (1963.85 °C) |
| Boiling point | 3968 K (3694.85 °C) |
| Density | 12.4 g/cm³ |
| Discovered | 1803 |
Group 9
Calculate with Rhodium
Atomic weight: IUPAC CIAAW standard atomic weight. Other properties: PubChem (U.S. National Library of Medicine, public domain). Values such as melting point and radius depend on how they were measured; check a data book for precise work.