Neptunium
| Element Name | Neptunium |
|---|---|
| Symbol | Np |
| Atomic Number | 93 |
| Group | Rare Earth |
| Crystal Structure | Orthorhombic |
| Atomic Mass | -237.0482 |
| Electronic Configuration | 2,8,18,32,22,9,2 |
| Orbital Configuration | [Rn] 5f4 6d1 7s2 |
| Valency | 3,4,5,6 |
| Melting Point | 640°C |
| Boiling Point | 3902°C |
| Electo-negativity | 1.36 |
| Covalent Radius | -- |
