Basic Information

Name: Cesium

Symbol: Cs

Atomic Number: 55

Atomic Mass: 132.90546 amu

Melting Point: 28.5 °C (301.65 K, 83.3 °F)

Boiling Point: 678.4 °C (951.55005 K, 1253.12 °F)

Number of Protons/Electrons: 55

Number of Neutrons: 78

Classification: Alkali Metal

Crystal Structure: Cubic

Density @ 293 K: 1.873 g/cm3

Color: silvery white

British Spelling: Caesium

IUPAC Spelling: Caesium

Discovery and Origin facts

Date of Discovery: 1860

Discoverer: Fustov Kirchoff

Name Origin: From the Latin word caesius (sky blue)

Discovered in 1860 during an analysis of Durkheim mineral water .

Can be found by heating both elements with sodium metal to 650 degrees Celcius

Metallic cesium is too hard to handle so it is distributed in azide, heated cesium.

Is a bad mix with air and water.

Uses

removes air traces in vacuum tubes

Atomic clocks

Removes air traces in vacuum tubes

Ion propulsion systems

Medical

Photoelectric cells

Cesium vapor

Magnetometer

A picture of Liquid cesium

Solid Cesium

First Energy Level: 2

      Second Energy Level: 8

      Third Energy Level: 18

      Fourth Energy Level: 18

      Fifth Energy Level: 8

      Sixth Energy Level: 1

Fun Facts

Currently found in the mineral pollicite.

Commonly mixed up with similar element rubidium.

Also found in Iepidolite

It's Elementary