Difference between revisions of "Calcium"
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[[Category:Critical and Essential Elements]] | [[Category:Critical and Essential Elements]] | ||
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Revision as of 05:37, 21 October 2008
| Calcium | |
|---|---|
| Ca | |
| In situ availability: | |
| Necessity: | essential |
| Atomic number: | 20 |
| Atomic mass: | 40.078 |
| group: | 2 |
| period: | 4 |
| normal phase: | Solid |
| series: | Alkaline earth metals |
| density: | 1.55 g/cm3 |
| melting point: | 1115K, 842°C, 1548°F |
| boiling point: | 1757K, 1484°C, 2703°F |
| Na ← Mg → N/A | |
| K ← Ca → Sc | |
| Rb ← Sr → Y | |
| Atomic radius (pm): | 180 |
| Bohr radius (pm): | 194 |
| Covalent radius (pm): | 174 |
| Van der Waals radius (pm): | |
| ionic radius (pm): | (+2) 100 |
| 1st ion potential (eV): | 6.11 |
| Electron Configuration | |
| 1s2 2s2 2p6 3s2 3p6 4s2 | |
| Electrons Per Shell | |
| 2, 8, 8, 2 | |
| Electronegativity: | 1 |
| Electron Affinity: | 0.04 |
| Oxidation states: | 2 |
| Magnetism: | Paramagnetic |
| Crystal structure: | Face centered cubic |
Calcium is a Alkaline earth metal in group 2.
It has a Face centered cubic crystalline structure.
This element has 7 stable isotopes: 40, , 42, 43, 44, 46, and 48.
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