37Rb
Rubidium
Alkali MetalRubidium (Rb) is element 37, an alkali metal, in period 5 and group 1 of the periodic table. Its standard atomic weight is 85.468, it melts at 39.31 °C and boils at 688 °C. Discovered by Robert Bunsen, 1861.
Atomic Number37
SymbolRb
NameRubidium
Atomic Weight85.468 u
CategoryAlkali Metal
Period5
Group1
Melting Point39.31 °C
Boiling Point688 °C
Density1.532 g/cm³
Electron Config[Kr] 5s1
Discovered ByRobert Bunsen, 1861