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Atomic symbol - Rb
Atomic weight - 85.4678
Atomic number - 37
Electron configuration - 2-8-18-8-1
Oxidation states - +1
State of matter - solid
Light metal
Discovered in 1861 by Robert Bunsen and Gustav Kirchhoff
Boils at 688 .C, melts at 38.9 .C

Notes:
Rubidium is the second second most reactive metal and has a silvery white
lustre. It is very soft. It ignites spontaneously in the presence of air and
reacts violently with water. Rubidium atomic clocks have been made but are not
quite as precise as cesium ones.

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