Cobalt vs Rhodium
Pick up to 3 elements and see how they stack up.
| Property | Cobalt | Rhodium |
|---|---|---|
| Atomic number | 27 | 45 |
| Atomic mass | 58.933 | 102.91 |
| Electronegativity | 1.88 | 2.28 |
| Melting point | 1,768 K (1,494.8 °C) | 2,237 K (1,963.8 °C) |
| Boiling point | 3,200 K (2,926.8 °C) | 3,968 K (3,694.8 °C) |
| Density | 8.9 g/cm³ | 12.41 g/cm³ |
| Atomic radius | 192 pm | 195 pm |
| Ionization energy | 7.881 eV | 7.459 eV |
| Discovered | 1735 | 1804 |
| Category | Transition metal | Transition metal |
| State at room temp. | Solid | Solid |
| Block | d | d |
| Group | 9 | 9 |
| Period | 4 | 5 |
| Valence electrons | 2 | 1 |
| Common charges | +2, +3 | +3 |
| Electron configuration | [Ar] 3d7 4s2 | [Kr] 4d8 5s1 |