Periodic Table

Cesium

Atomic Number: 55

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Overview
PropertyValueUnits

Atomic Mass

132.9055

Density

1.879

g/cckg/m3lb/in3
Thermal Properties

Thermal Properties

PropertyValueUnits

Melting Point

29°C

K°C°F°R

Boiling Point

678°C

K°C°F°R

Critical Pressure

9.4 MPa

MPaAtmPSI

Critical Temperature

1938°C

K°C°F°R

Heat of Fusion

2.09 kJ/mol

kJ/molcal/mol

Heat of Vaporization

65 kJ/mol

kJ/molcal/mol

Specific Heat

242 J/kg·K

J/kg·K

Thermal Conductivity

36 W/m·K

W/m·K
Electon Configuration

Electron Structure

[Xe] 6s1

Shell Arrangement

KLMNOPQ
281818810
LevelS OrbitalP OrbitalD OrbitalF Orbital
Level 1
Level 2
History

Year Discovered

1860

Isotopes
IsotopeCommon NameSymbolMassStatusAbundanceHalf-lifeDecay modeDecay EnergyNuclear SpinMagnetic Moment

55

Cs

133

CesiumCs133Stable100-----

Isotopic mass data for stable isotopes is from:
G. Audi, A.H. Wapstra in Nuclear Physics A, 1993, 565, 1-65
and
G. Audi, A.H.Wapstra in Nuclear Physics A, 1995, 595 409-480.

Natural abundance data is from:
K.J.R. Rosman, P.D.P. Taylor in Pure Appplied Chemistry, 1999, 71, 1593-1607.

 

Occurance
In the Universe0.00000008%
In the Sun0.0000008%
In Meteorites0.000014%
In the Earth's Crust0.00019%
In Seawater0.00000005%
In the Human Body0.000002%
Models

Pictures, videos and 3D models of the element

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