Name :  Rubidium
Symbol :  Rb
Atomic Number :  37
Atomic Weight :  85.4678
Specific Heat :  0.363 J/gK
Melting Point :  38.89°C
Vaporization :  72.216 kJ/mol
Boiling Point :  686°C
Electronegativity :  0.82
Density@293 K :  1.53 g/cm³
Discovered :  R. Bunsen, G. Kirchoff, Germany, 1861
Description :  Soft, silvery-white, highly reactive metal.
Uses :  Used as a catalyst, photocells, and vacuum and cathode-ray tubes.