Astatine
Halogen| Atomic number | 85 |
|---|---|
| Category | Halogen |
| Atomic mass | 210 |
| Electron configuration | [Xe]4f¹⁴ 5d¹⁰ 6s² 6p⁵ |
| Oxidation states | −1, +1 |
| Electronegativity | 2.2 |
| Melting point | 302 °C |
| Boiling point | 337 °C |
| Density | 7 g/cm³ |
| Crystal structure | Unknown |
| Group | 17 |
| Period | 6 |
| Block | p |
| Discovered | 1,940 |
| Crustal abundance | 0 ppm |