Iodine
Halogen| Atomic number | 53 |
|---|---|
| Category | Halogen |
| Atomic mass | 126.9 |
| Electron configuration | [Kr]4d¹⁰ 5s² 5p⁵ |
| Oxidation states | −1 … +7 |
| Electronegativity | 2.66 |
| Melting point | 113.7 °C |
| Boiling point | 184.3 °C |
| Density | 4.93 g/cm³ |
| Crystal structure | Orthorhombic |
| Group | 17 |
| Period | 5 |
| Block | p |
| Discovered | 1,811 |
| Crustal abundance | 0.45 ppm |