Astatine
| Element Name | Astatine |
|---|---|
| Symbol | At |
| Atomic Number | 85 |
| Group | Halogen |
| Crystal Structure | Unknown |
| Atomic Mass | -209.9871 |
| Electronic Configuration | 2,8,18,32,18,7 |
| Orbital Configuration | [Xe] 4f14 5d10 6s2 6p5 |
| Valency | 1,3,5,7 |
| Melting Point | 302°C |
| Boiling Point | 337°C |
| Electo-negativity | 2.2 |
| Covalent Radius | 1.45 Å |
