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K
in WebElements
in X-Ray info
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K, 19
potassium (English)
potassium, m. (French)
Kalium, n. (German)
kalij (Russian)
potassio??? (Spanish)
kalium (Swedish)
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| Symbol, number | K, 19 (alkali metal), Group: 1; 1A |
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| Weight | 39.0983 |
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| In Nature | |
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| Discovered | 1807, by Sir Humphry Davy (England) |
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| Density [kg/m3] | 863 [293 K] (solid) 828 [337 K] (liquid) |
| Molar volume | 45.36 cm3 |
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| Melting Temperature | 336.80 K (63.8 °C) Enthalpy: 77.53 kJ/mol |
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| Boiling Temperature | 1047 K (774 °C) Enthalpy: 2.40 kJ/mol |
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| Electrical resistance | 6.15E-8 [273 K] Wm |
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| Thermal | Conductivity: 102.4 [300 K] W/Km Expansion: 83E-6 /K |
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| Configuration | 1s2 2s2p6 3s2p6 4s1 |
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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 |
| K |
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