Actinium
| Element Name | Actinium |
|---|---|
| Symbol | Ac |
| Atomic Number | 89 |
| Group | Transition Metal |
| Crystal Structure | Cubic: Face centered |
| Atomic Mass | -227.0278 |
| Electronic Configuration | 2,8,18,32,18,9,2 |
| Orbital Configuration | [Rn] 6d1 7s2 |
| Valency | -- |
| Melting Point | 1050°C |
| Boiling Point | 3200°C (±300°C) |
| Electo-negativity | 1.1 |
| Covalent Radius | -- |
