Rubidium is a soft, highly reactive alkali metal used mostly in research and specialised atomic-frequency equipment.
Atomic number
37
Category
Alkali metal
Period
5
Group
1
State
Solid
Fun facts about Rubidium
It can ignite on exposure to air.
Rubidium atoms provide frequency references in some atomic clocks.
The metal must be stored under inert conditions.
Common uses of Rubidium
Atomic frequency standards
Physics research
Speciality photocells
Where Rubidium sits in the periodic table
Rubidium is classified as a alkali metal in period 5 and group 1 of the periodic table. Under the conditions represented in this reference, its state is solid.
Quick chemistry revision
For quick revision, pair the symbol Rb with atomic number 37 and the listed atomic mass 85.468. The summary, facts, and uses above keep those element properties together in one reference.