- Rubidium was discovered by Robert Bunsen in 1861. From Latin word Rubidus ( mean, Dark red or bright red)
- Elemental rubidium is highly reactive and rapid oxidation in air.
- Rubidium may be liquid at room temperature.
- Rubidium compounds have various chemical and electronic aplications.
- Rubidium from amalgam with mercury and alloy with gold, sodium, potassium and cesium.
- It is the 23rd most abundant element in the earth crust.
- It is the second most electropositive element.
- Occurs naturally minerals like leucite, pollucite, carnalite and zinnwaldite.
Symbol - Rb
Atomic number - 37
Number of electrons - 2, 8, 18, 8, 1
Electronic configuration - [ Krypton ]5s1
Melting point - 312.46 K
Boiling point - 961 K
- Rubidium chloride is used in biochemistry.
- Rubidium-87 is used in some atomic clocks to maintain accuracy.
- Rb is used as a 'getter' in vaccum tubes and making special glasses.
- It is easily ionised and so has possible use in 'ion engine' for space vehicles.