Difference between revisions of "Barium"
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Revision as of 04:37, 21 October 2008
| Barium | |
|---|---|
| Ba | |
| In situ availability: | |
| Necessity: | |
| Atomic number: | 56 |
| Atomic mass: | 137.327 |
| group: | 2 |
| period: | 6 |
| normal phase: | Solid |
| series: | Alkaline earth metals |
| density: | 3.51 g/cm3 |
| melting point: | 1000K, 727°C, 1341°F |
| boiling point: | 2170K, 1897°C, 3447°F |
| Rb ← Sr → Y | |
| Cs ← Ba → La | |
| Fr ← Ra → Ac | |
| Atomic radius (pm): | 215 |
| Bohr radius (pm): | 253 |
| Covalent radius (pm): | 198 |
| Van der Waals radius (pm): | |
| ionic radius (pm): | (+2) 142 |
| 1st ion potential (eV): | 5.21 |
| Electron Configuration | |
| 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s2 | |
| Electrons Per Shell | |
| 2, 8, 18, 18, 8, 2 | |
| Electronegativity: | 0.89 |
| Electron Affinity: | 0.15 |
| Oxidation states: | 2 |
| Magnetism: | Paramagnetic |
| Crystal structure: | Body centered cubic |
Barium is a Alkaline earth metal in group 2.
It has a Body centered cubic crystalline structure.
This element has 7 stable isotopes: 130, 132, 134, 135, 136, 137, and 138.
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