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Rb
in WebElements
in X-Ray info
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Rb, 37
rubidium (English)
rubidium, m. (French)
Rubidium, n. (German)
rubidij (Russian)
rubidium (Swedish)
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| Symbol, number | Rb, 37 (alkali metal), Group: 1; 1A |
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| Weight | 85.4678 |
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| In Nature | |
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| Discovered | 1861, by Robert Bunsen and G.R. Kirchhoff (Germany) |
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| Density [kg/m3] | 1532 [293 K] (solid) 1475 [312 K] (liquid) |
| Molar volume | 55.79 cm3 |
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| Melting Temperature | 312.2 K (39.2 °C) Enthalpy: 69.2 kJ/mol |
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| Boiling Temperature | 961 K (688 °C) Enthalpy: 2.20 kJ/mol |
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| Electrical resistance | 12.5E-8 [293 K] Wm |
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| Thermal | Conductivity: 58.2 [300 K] W/Km Expansion: 90E-6 /K |
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| Configuration | 1s2 2s2p6 3s2p6d10 4s2p6 5s1 |
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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 |
| Rb |
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