Selenium
| Element Name | Selenium |
|---|---|
| Symbol | Se |
| Atomic Number | 34 |
| Group | Non-Metal |
| Crystal Structure | Hexagonal |
| Atomic Mass | 78.96 |
| Electronic Configuration | 2,8,18,6 |
| Orbital Configuration | [Ar] 3d10 4s2 4p4 |
| Valency | -2,4,6 |
| Melting Point | 217°C |
| Boiling Point | 684.9°C |
| Electo-negativity | 2.55 |
| Covalent Radius | 1.16 Å |
