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Ca
in WebElements
in X-Ray info
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Ca, 20
calcium (English)
calcium, m. (French)
Calcium, n. (German)
kal'tsij (Russian)
calcio??? (Spanish)
kalcium (Swedish)
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| Symbol, number | Ca, 20 (alkaline earth metal), Group: 2; 2A |
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| Weight | 40.078 |
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| In Nature | |
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| Discovered | 1808, by Sir Humphry Davy (England) |
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| Density [kg/m3] | 1550 [293 K] (solid) 1365 [1112 K] (liquid) |
| Molar volume | 25.86 cm3 |
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| Melting Temperature | 1112 K (839 °C) Enthalpy: 149.95 kJ/mol |
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| Boiling Temperature | 1757 K (1484 °C) Enthalpy: 9.33 kJ/mol |
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| Electrical resistance | 3.43E-8 [293 K] Wm |
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| Thermal | Conductivity: 200 [300 K] W/Km Expansion: 22E-6 /K |
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| Configuration | 1s2 2s2p6 3s2p6 4s2 |
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| Ionisation [kJ/mol] |
| M--> |
M+--> |
M2+--> |
M3+--> |
M4+--> |
M5+--> |
M6+--> |
M7+--> |
M8+--> |
M9+-->M10+ |
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| Thermodynamics |
| State |
DfH° |
DfG° |
S° |
CpH |
H°298.15-H°0 |
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[J/Kmol] |
[kJ/mol] |
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| Isotopes |
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Mass |
In nature |
Half-life |
Spin |
m/mN |
NMM |
Decay |
| Ca |
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