Barium
Alkaline earth metal| Atomic number | 56 |
|---|---|
| Category | Alkaline earth metal |
| Atomic mass | 137.33 |
| Electron configuration | [Xe]6s² |
| Oxidation states | +2 |
| Electronegativity | 0.89 |
| Melting point | 727 °C |
| Boiling point | 1,897 °C |
| Density | 3.51 g/cm³ |
| Crystal structure | Body-centred cubic |
| Group | 2 |
| Period | 6 |
| Block | s |
| Discovered | 1,808 |
| Crustal abundance | 425 ppm |
