Barium
| Basic Information | Crystal Structure | Isotope | Facts | Related Links |
| Symbol: | Ba |
| Atomic Number: | 56 |
| Atomic weight: | 137.33u |
| Melting Point: | 1002K |
| Boiling Point: | 2171K |
| Number of Protons/Electrons: | 56 |
| Number of Neutrons: | 81 |
| Classification: | Alkaline Earth Metal |
| Crystal Structure: | Body Centered Cubic |
| Density at 293 K: | 3.5g/mL |
| Color: | Silver |
| Bonding radius: | 1.98A |
| Atomic radius: | 2.78A |
| Ionization Potential: | 5.212V |
| Electronegativity: | 0.89 |
| Heat of vaporization: | 142kJ/mol |
| Heat of fusion: | 7.75kJ/mol |
| Specific heat: | 0.204J/gK |
| Electron configuration: | [Xe]6s2 |
Crystal Structure
| Isotope | Half Life |
| Ba130 | Stable |
| Ba131 | 11.7 days |
| Ba132 | Stable |
| Ba133 | 10.5 years |
| Ba133m | 1.6 days |
| Ba134 | Stable |
| Ba135 | Stable |
| Ba135m | 1.2 days |
| Ba136 | Stable |
| Ba137 | Stable |
| Ba137m | 2.6 minutes |
| Ba138 | Stable |
| Ba139 | 1.4 hours |
| Ba140 | 12.8 days |
| Ba141 | 18.3 minutes |
| Ba142 | 10.7 minutes |
| Date of Discovery: | 1808 |
| Discoverer: | Sir Humphrey Davy |
| Uses: | |
| Obtained From: | Barytine, whiterite |