Barium vs Lanthanum
Pick up to 3 elements and see how they stack up.
| Property | Barium | Lanthanum |
|---|---|---|
| Atomic number | 56 | 57 |
| Atomic mass | 137.33 | 138.91 |
| Electronegativity | 0.89 | 1.1 |
| Melting point | 1,000 K (726.8 °C) | 1,193 K (919.8 °C) |
| Boiling point | 2,118 K (1,844.8 °C) | 3,737 K (3,463.8 °C) |
| Density | 3.51 g/cm³ | 6.162 g/cm³ |
| Atomic radius | 268 pm | 240 pm |
| Ionization energy | 5.212 eV | 5.577 eV |
| Discovered | 1808 | 1839 |
| Category | Alkaline earth metal | Lanthanide |
| State at room temp. | Solid | Solid |
| Block | s | f |
| Group | 2 | — |
| Period | 6 | 6 |
| Valence electrons | 2 | 2 |
| Common charges | +2 | +3 |
| Electron configuration | [Xe] 6s2 | [Xe] 5d1 6s2 |