Rhodium vs Iridium
Pick up to 3 elements and see how they stack up.
| Property | Rhodium | Iridium |
|---|---|---|
| Atomic number | 45 | 77 |
| Atomic mass | 102.91 | 192.22 |
| Electronegativity | 2.28 | 2.2 |
| Melting point | 2,237 K (1,963.8 °C) | 2,719 K (2,445.8 °C) |
| Boiling point | 3,968 K (3,694.8 °C) | 4,403 K (4,129.8 °C) |
| Density | 12.41 g/cm³ | 22.56 g/cm³ |
| Atomic radius | 195 pm | 202 pm |
| Ionization energy | 7.459 eV | 9.1 eV |
| Discovered | 1804 | 1803 |
| Category | Transition metal | Transition metal |
| State at room temp. | Solid | Solid |
| Block | d | d |
| Group | 9 | 9 |
| Period | 5 | 6 |
| Valence electrons | 1 | 2 |
| Common charges | +3 | +3, +4 |
| Electron configuration | [Kr] 4d8 5s1 | [Xe] 4f14 5d7 6s2 |