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Periodic Table - Elements - Rubidium
| Symbol |
Rb |
|
| Atomic Number |
37 |
Relative Atomic Mass
12C = 12.0000 |
85.4678 |
Atomic Radius
pm |
247.5 |
First Ionisation Energy
kJ mol-1 |
403.0 |
| Electronegativity |
0.82 |
Density
kg m-3 |
1532 [293 K]
1475 [l., m.p.] |
Molar Volume
cm3 |
55.79 |
Thermal Conductivity
W m-1 K-1 |
58.2 [300 K] |
Melting Point
K |
312.2 |
Boiling Point
K |
961 |
| Number of Isotopes |
30 |
Ground State Electron
Configuration |
[Kr]5s1 |
| Term Symbol |
2S1/2 |
| Discovery |
Discovered by R.W. Bunsen and G. Kirchhoff (University of Heidelberg, Germany) in 1861 |
| Name Derived From |
Latin rubidius meaning 'deepest red' |
Name in Other
Languages |
 Croatian | Rubidij |
 Danish | rubidium |
 Dutch | rubidium |
 Finnish | rubidium |
 French | rubidium |
 German | Rubidium |
 Italian | rubidio |
 Norwegian | rubidium |
 Portuguese | rubídio |
 Spanish | rubidio |
 Swedish | rubidium |
| Peter van der Krogt's Element Multidict - element name translations in over 48 langauges |
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Page compiled: Wed Sep 05 18:37:55 GMT+01:00 2001
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