Ba
Barium
Element 56 · Alkaline earth metal · Period 6, Group 2
Solid · Discovered 1808
Atomic Properties
| Atomic Number | 56 |
| Atomic Mass | 137.33u |
| Electron Configuration | [Xe]6s2 |
| Electronegativity | 0.89Pauling |
| Atomic Radius | 268pm |
| Ionization Energy | 5.212eV |
| Oxidation States | +2 |
Physical Properties
| Standard State | Solid |
| Melting Point | 1000K |
| Boiling Point | 2170K |
| Density | 3.62g/cm³ |
| Group Block | Alkaline earth metal |
| Year Discovered | 1808 |