Erbium
| Element Name | Erbium |
|---|---|
| Symbol | Er |
| Atomic Number | 68 |
| Group | Rare Earth |
| Crystal Structure | Hexagonal |
| Atomic Mass | 167.26 |
| Electronic Configuration | 2,8,18,30,8,2 |
| Orbital Configuration | [Xe] 4f12 6s2 |
| Valency | 3 |
| Melting Point | 1529°C |
| Boiling Point | 2868°C |
| Electo-negativity | 1.24 |
| Covalent Radius | 1.57 Å |
