Cs

CESIUM

Definition :from 'caesius' or skyblue, it is the softed metal since it is liquid in room temperature of20C.

Discovery :1860 of keirchoff of germany

Uses :photoelectric cells, atomic clocks

Group of Elements :Alkali metals(Liquid)

Atomic Weight :132.90545

Oxidation State :+1

Melting Point :28.40

Boiling Point :669.3

Density :1.87 g/cm3

Electronegativity :0.7