Actinium
Electron Configuration
|
General Properties
| Atomic Symbol | Ac |
| Atomic Weight | 227.00 |
| Element Number | 89 |
| Standard State | -- |
| Standard Type | -- |
| Date of Discovery | 1899 |
| Discoverer | Debierne |
Physical Properties
| Oxidation States | 3 |
| Boiling Point | 3470 K |
| Melting Point | 1324 K |
| Density | 10.07 g/cm³ |
| Electron Configuration | [Rn]6d1,7s2 |
| Acid/Base Properties | -- |
| Crystal Structure | Cubic, face centered |
| Electronegativity | 1 |
| Heat of Vaporization | -- |
| Heat of Fusion | -- |
| Electrical Conductivity | -- |
| Thermal Conductivity | 12 Wm-¹K-¹ (at 300 K) |
| Specific Heat Capacity | 0.120 Jg-¹K-¹ (at 300 K) |
| First Ionization Potential | 5.17 |
| Atomic Volume | 22.5 cm³/mol |
| Atomic Radius | 1.88 Å |
| Covalent Radius | -- |
| Synthetic | No |