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Barium is a chemical element; it has symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element.
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used metal baryte sulfate compounds oxide element barite calcium strontium carbon aluminium form iron also known carbonate zinc lead oxygen
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Barium | 130Ba | 0.11% | 1.00 | infobox |
| Barium | 131Ba | synth | 1.00 | infobox |
| Barium | 132Ba | 0.1% | 1.00 | infobox |
| Barium | 133Ba | synth | 1.00 | infobox |
| Barium | 134Ba | 2.42% | 1.00 | infobox |
| Barium | 135Ba | 6.59% | 1.00 | infobox |
| Barium | 136Ba | 7.85% | 1.00 | infobox |
| Barium | 137Ba | 11.2% | 1.00 | infobox |
| Barium | 138Ba | 71.7% | 1.00 | infobox |
| Barium | 140Ba | synth | 1.00 | infobox |
| Barium | Appearance | silvery gray; with a pale yellow tint | 1.00 | infobox |
| Barium | at T (K) | 911 | 1.00 | infobox |
| Barium | Atomic number (Z) | 56 | 1.00 | infobox |
| Barium | Atomic radius | empirical: 222 pm | 1.00 | infobox |
| Barium | Block | s-block | 1.00 | infobox |
| Barium | Boiling point | 2118 K (1845 °C, 3353 °F) | 1.00 | infobox |
| Barium | Bulk modulus | 9.6 GPa | 1.00 | infobox |
| Barium | CAS Number | 7440-39-3 | 1.00 | infobox |
| Barium | Covalent radius | 215±11 pm | 1.00 | infobox |
| Barium | Crystal structure | body-centered cubic (bcc) (cI2) | 1.00 | infobox |
| Barium | Density (at 20° C) | 3.594 g/cm3 | 1.00 | infobox |
| Barium | Discovery | Carl Wilhelm Scheele (1772) | 1.00 | infobox |
| Barium | Electrical resistivity | 332 nΩ⋅m (at 20 °C) | 1.00 | infobox |
| Barium | Electron configuration | [Xe] 6s2 | 1.00 | infobox |
| Barium | Electronegativity | Pauling scale: 0.89 | 1.00 | infobox |
| Barium | Electrons per shell | 2, 8, 18, 18, 8, 2 | 1.00 | infobox |
| Barium | First isolation | Humphry Davy (1808) | 1.00 | infobox |
| Barium | Group | group 2 (alkaline earth metals) | 1.00 | infobox |
| Barium | Heat of fusion | 7.12 kJ/mol | 1.00 | infobox |
| Barium | Heat of vaporization | 142 kJ/mol | 1.00 | infobox |
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