Difference between revisions of "Radium"
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Revision as of 04:37, 21 October 2008
| Radium | |
|---|---|
| Ra | |
| In situ availability: | |
| Necessity: | |
| Atomic number: | 88 |
| Atomic mass: | [226] |
| group: | 2 |
| period: | 7 |
| normal phase: | Solid |
| series: | Alkaline earth metals |
| density: | 5.5 g/cm3 |
| melting point: | 973K, 700°C, 1292°F |
| boiling point: | 2010K, 1737°C, 3159°F |
| Cs ← Ba → La | |
| Fr ← Ra → Ac | |
| N/A ← N/A → N/A | |
| Atomic radius (pm): | 215 |
| Bohr radius (pm): | |
| Covalent radius (pm): | |
| Van der Waals radius (pm): | |
| ionic radius (pm): | (+2) 162 |
| 1st ion potential (eV): | 5.28 |
| Electron Configuration | |
| 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 7s2 | |
| Electrons Per Shell | |
| 2, 8, 18, 32, 18, 8, 2 | |
| Electronegativity: | 0.9 |
| Electron Affinity: | - |
| Oxidation states: | 2 |
| Magnetism: | Nonmagnetic |
| Crystal structure: | Body centered cubic |
Radium is a Alkaline earth metal in group 2.
It has a Body centered cubic crystalline structure.
It does not have any isotopes considered to be natural. Its longest-lived known isotope has an atomic number of 226.
This element has no stable isotopes.
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