Barium
Uses, Compounds, & Facts
barium (Ba), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table. The element is used in metallurgy, and its compounds are used in pyrotechnics, petroleum production, and radiology.
| atomic number | 56 |
|---|---|
| atomic weight | 137.327 |
| melting point | 727 °C (1,341 °F) |
| boiling point | 1,805 °C (3,281 °F) |
| specific gravity | 3.51 (at 20 °C, or 68 °F) |
| oxidation state | +2 |
| electron configuration | [Xe]6s2 |
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