| Attribute | Value |
|---|---|
| Symbol | Ra |
| Standard state | Solid |
| Atomic mass | 226.02541 u |
| Electron configuration | [Rn]7s² |
| Oxidation states |
|
| Electronegativity (pauling scale) | 0.9 |
| Atomic radius (van der waals) | 283 pm |
| Ionization energy | 5.279 eV |
| Melting point | 973 K |
| Boiling point | 1413 K |
| Density | 5 g/cm³ |
| Atomic number | 88 |
| Group name | Alkaline earth metal |
| Discovered | 1898 year |
| Electron affinity | Add |