Radium
Electron Configuration
|
General Properties
| Atomic Symbol | Ra |
| Atomic Weight | 226.0254 g/mol |
| Element Number | 88 |
| Standard State | Solid |
| Standard Type | Strongly Basic |
| Date of Discovery | 1898 |
| Discoverer | Curie |
Physical Properties
| Oxidation States | 2 |
| Boiling Point | 1413 K |
| Melting Point | 973 K |
| Density | 5.0 g/cm³ |
| Electron Configuration | [Rn]7s2 |
| Acid/Base Properties | Basic |
| Crystal Structure | Cubic, body centered |
| Electronegativity | 0.89 |
| Heat of Vaporization | 136.82 kJ/mol |
| Heat of Fusion | 8.37 kJ/mol |
| Electrical Conductivity | 1.0 10^6omg-¹cm-¹ |
| Thermal Conductivity | 18.6 Wm-¹K-¹ (at 300 K) |
| Specific Heat Capacity | 0.094 Jg-¹K-¹ (at 300 K) |
| First Ionization Potential | 5.279 |
| Atomic Volume | 45.2 cm³/mol |
| Atomic Radius | 2.33 Å |
| Covalent Radius | -- |
| Synthetic | No |