Caesium

Caesium, Cs, is an Alkali Metal element, found in Group Ia of the periodic table.

Atomic Number : 55
Relative Atomic Mass : 132.91

Discovery

Cesium was discovered by Bunsen and Kirchoff in 1860AD.

Occurrence

Cesium, Cs, occurs in lepidolite and pollucite.

Extraction

Cesium is isolated by the Electrolysis of fused cesium cyanide.

Properties

Cesium is a liquid metal at room temperature.
Cesium is the most electropositive metal.
Cesium reacts explosively with water.

Uses

Cesium is used in atomic clocks.

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