Thallium
| Element Name | Thallium |
|---|---|
| Symbol | Tl |
| Atomic Number | 81 |
| Group | Metal |
| Crystal Structure | Hexagonal |
| Atomic Mass | 204.3833 |
| Electronic Configuration | 2,8,18,32,18,3 |
| Orbital Configuration | [Xe] 4f14 5d10 6s2 6p1 |
| Valency | 1,3 |
| Melting Point | 303.5°C |
| Boiling Point | 1457°C ±10°C |
| Electo-negativity | 2.04 |
| Covalent Radius | 1.48 Å |
