| Element | Barium |
| Symbol | Ba |
| Atomic Number | 56 |
| Molar Mass | 137.34 gmol-1 |
| Electron Configuration | [Xe]6s2 |
| Normal State | solid metal |
| Density @STP | 3.59 g cm-3 |
| Melting Point | 727oC |
| Boiling Point | 1897oC |
| Stable Isotopes | 130Ba, 132Ba, 134Ba, 135Ba, 136Ba, 137Ba, 138Ba |
| Atomic Radius | 224 pm |
| Ionic Radius | 136 (2+) pm |
| Electronegativity (Pauling) | 0.89 |
| Ionization Energy (1st) | 503 kJ mol-1 |
| Ionization Energy (2nd) | 965 kJ mol-1 |
| Ionization Energy (3rd) | 3600 kJ mol-1 |
| Molar Heat Capacity | 28.1 J K-1mol-1 |
| Standard Molar Entropy | 62.5 J K-1mol-1 |
| Enthalpy of Fusion | 7.66 kJ mol-1 |
| Enthalpy of Vapourization | 150.9 kJ mol-1 |
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