Barium vs Radium
Pick up to 3 elements and see how they stack up.
| Property | Barium | Radium |
|---|---|---|
| Atomic number | 56 | 88 |
| Atomic mass | 137.33 | 226 |
| Electronegativity | 0.89 | 0.9 |
| Melting point | 1,000 K (726.8 °C) | 973 K (699.8 °C) |
| Boiling point | 2,118 K (1,844.8 °C) | 2,010 K (1,736.8 °C) |
| Density | 3.51 g/cm³ | 5.5 g/cm³ |
| Atomic radius | 268 pm | 283 pm |
| Ionization energy | 5.212 eV | 5.279 eV |
| Discovered | 1808 | 1898 |
| Category | Alkaline earth metal | Alkaline earth metal |
| State at room temp. | Solid | Solid |
| Block | s | s |
| Group | 2 | 2 |
| Period | 6 | 7 |
| Valence electrons | 2 | 2 |
| Common charges | +2 | +2 |
| Electron configuration | [Xe] 6s2 | [Rn] 7s2 |