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Difference between revisions of "Cesium"

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Removes air traces in vacuum tubes, ion propulsions systems, etc. []
Removes air traces in vacuum tubes, ion propulsions systems, etc. []
== Other ==
== Precautions ==
== References ==
== References ==

Revision as of 22:42, 15 December 2009

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General Info
Atomic Symbol Atomic symbol::Cs
Atomic Number Atomic number::55
Atomic Weight Atomic weight::132.9054 g/mol
Chemical series alkali metals
Appearance silvery gold
Group, Period, Block 1, 6, s
Electron configuration [Xe] 6s1
Electrons per shell 2,8,18,18,8,1
Electron shell caesium.png
CAS number CAS number::7440-46-2
Physical properties
Density Density:: g/ml
Melting point Melting point::28.44 °C
Boiling point Boiling point::671 °C
Isotopes of Cesium
iso NA half-life DT DE (MeV) DP
is stable with neutrons.
All properties are for STP unless otherwise stated.


Caesium is an element of alkali metal group. It is known as Cesium. German chemists Robert William Bunsen and Gustav Robert Kirchhoffin discovered Cesium 1860 in mineral water from Dürkheim, German. [1]



Caesium is the chemical element in the periodic table. It has a atomic number, 55. Caesium is known as Cesium with symbol Cs. This metal looks like silvery gold and is both soft and ductile. It is the most electropositive chemical element in the periodic table. Cesium’s melting point is 28.4.[2]


An element of the alkali metal group, Cesium participates with Earth crust. It is occurs several minerals such as lepidolite, pollucite, amazonite, etc. One of the most important of this metal is located at Bernic Lake in Manitoba, Canada. [3] Among several minerals, Silicate mineral, Lepidolite contains lots of Cesium. It can be isolated by electrolysis. By electrlysis Lepidolite, we can get some pure and gas-free Caesium. In 1970s, Cesium was very expensive, its price was almost 30$ per gram.[4]



Caesium is used in many ways. It associated with many sources such as Atomic clocks, Removes air traces in vacuum tubes, ion propulsions systems, etc. [5]