Osmium vs Iridium
Pick up to 3 elements and see how they stack up.
| Property | Osmium | Iridium |
|---|---|---|
| Atomic number | 76 | 77 |
| Atomic mass | 190.23 | 192.22 |
| Electronegativity | 2.2 | 2.2 |
| Melting point | 3,306 K (3,032.8 °C) | 2,719 K (2,445.8 °C) |
| Boiling point | 5,285 K (5,011.8 °C) | 4,403 K (4,129.8 °C) |
| Density | 22.59 g/cm³ | 22.56 g/cm³ |
| Atomic radius | 216 pm | 202 pm |
| Ionization energy | 8.7 eV | 9.1 eV |
| Discovered | 1803 | 1803 |
| Category | Transition metal | Transition metal |
| State at room temp. | Solid | Solid |
| Block | d | d |
| Group | 8 | 9 |
| Period | 6 | 6 |
| Valence electrons | 2 | 2 |
| Common charges | +3, +4 | +3, +4 |
| Electron configuration | [Xe] 4f14 5d6 6s2 | [Xe] 4f14 5d7 6s2 |