Category

Cesium

Catalogue

Atomic structure
Discovery
Source
Element USES
physical property
Chemical property
Geological data
Biology data

Atomic structure

Atomic radius/A: 3.34
Atomic volume/cm3 / mol: 71.07
Electronic configuration: 1 2 3 4 s2p6 s2 s2p6d10 s2p6d10 5 s2p6 6 s1
Ion radius/A: 1.67
Covalent radius/A: 2.35 oxidation state: 1

Discovery

1860 by r. Bunsen and G.R. Kirchhoff (Germany, HaiDeEr fort) found.

Source

Exist in cs garnet [(Cs4Al4Si9O26). H2O], there is very little in lithium mica.

Element USES

As air to remove agent, used to remove the vacuum tube of trace air. Because it is easy to ionization, be used as ion rocket engine, also used to test, atomic clocks and infrared lamp.

physical property

State: soft, light silvery white alkali metal.
Melting point (℃) : 28.55
Boiling point (℃) : 671
Density (g/cc, 300 K) : 1.873
Than hot/J/gK: 0.24
Evaporation heat/KJ/mol: 67.74
Melting hot/KJ/mol: 2.092

Geological data

abundance
Retention time/year: 600 000
The sun (relative to the H = 1 x 1012) : < 80 sea/P.P.M. : 3.0 x 10-4
The earth's crust/P.P.M. : 3 the Atlantic ocean surface: Pacific surface:
Atmospheric/P.P.M. (volume) : the Atlantic ocean depths: deep in the Pacific:

Biology data

Content in the human body
Liver/P.P.M. : 0.04-0.05
Organs: muscle/P.P.M. : 0.07-1.6
Blood/mg dm-3:0.0038 days intake/mg: 0.004-0.03
Bone/P.P.M. : 0.013 0.052 (70 Kg) are total body/mg: c. 6

Detailed information

Cesium/Cs