Dense, reactive, and the reason a "barium meal" makes your digestive tract show up on X-rays.
- Atomic number
- 56
- Atomic mass
- 137.327 u
- Phase
- Solid
- Electron configuration
- [Xe] 6s²
- Melting point
- 1,000 K · 726.9 °C
- Boiling point
- 2,170 K · 1,896.9 °C
- Density
- 3.51 g/cm³
- Electronegativity
- 0.89
- Period / Group
- 6 / 2
- Discovery year
- 1808