| Property | Value |
|---|---|
| Atoomnummer | 56 |
| Atoomgewicht | 137.3277 amu |
| Element family | Aardalkalimetalen |
| Elektronische configuratie | 1s2 |
| Stable and very long lived isotopes | 130Ba: 0.106%, 132Ba: 0.101%, 134Ba: 2.417%, 135Ba: 6.592%, 136Ba: 7.854%, 137Ba: 11.23%, 138Ba: 71.70% |
| Previous element | Cesium |
| Next element | Lantaan |
| Dichtheid | 3.594 g/cm3 (STP) |
| Smelten | 729 °C |
| Kookpunt | 1640 °C |
| Covalente straal | 1.96 Å |
| Van der Waals straal | 2.68 Å |
| Ionstraal | 1.35 Å |
| Metalic radius | 2.22 Å |
| Eerst ionisatiepotentiaal | 5.212 eV |
| Elektronenaffiniteit | 0.145 eV |
| Electronegativity | 0.89 |
| Discovery year | 1772 |
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