Cs
Caesium
Z 55 132.905 g/molAlkali Metal
Group
1
Period
6
Block
s
Occurrence
Merging neutron stars 85%Dying low-mass stars 15%Geochemical class: Lithophile
Biological Role
---
History
1860 (discovery)
Gustav Kirchhoff, Robert Bunsen
1882 (isolation)
Carl Setterberg
Named By
Gustav Kirchhoff, Robert Bunsen
Latin Name
Caesium
Abundance
Solar System< 0.0001%0.00127 ppm
x
Sun---
x
Meteorites< 0.0001%0.186 ppm
x
Earth's crust0.0002%2 ppm
x
Oceans< 0.0001%0.0003 ppm
x
Humans< 0.0001%0.0214 ppm
x