Iodine vs Iridium
| Property | I Iodine | Ir Iridium |
|---|---|---|
| Atomic number | 53 | 77 |
| Symbol | I | Ir |
| Name | Iodine | Iridium |
| Category | halogen | transition-metal |
| Standard Atomic Weight | 126.90447 u | 192.217 u |
| Period | 5 | 6 |
| Group | 17 | 9 |
| Block | p | s |
| Phase at STP | solid | solid |
| Electron configuration | [Kr]5s24d105p5 | [Xe]6s24f145d7 |
| Oxidation states | [-1, 1, 2, 3, 4, 5, 6, 7] | [-3, -2, -1, 1, 2, 3, 4, 5, 6, 7, 8, 9] |
| Electronegativity (Pauling) | 2.66 | 2.2 |
| Electron affinity | 3.059 eV | 1.565 eV |
| Density | 4930 kg/m³ | 2.256220e+4 kg/m³ |
| Melting point | 113.7 °C | 2445.85 °C |
| Boiling point | 184.4 °C | 4427.85 °C |
| Discovery year | 1811 | 1803 |