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Cesium

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== Properties ==
== Properties ==
[[File:example.jpg|thumb|150px|left|Description]]
[[File:example.jpg|thumb|150px|left|Description]]
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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.  
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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.[http://en.wikipedia.org/wiki/Caesium]
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[http://en.wikipedia.org/wiki/Caesium]
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== Occurrences ==
== Occurrences ==

Revision as of 02:07, 16 December 2009

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Cesium
Cesium
General Info
Atomic Symbol Cs
Atomic Number 55
Atomic Weight 132.9054 g/mol132.905 amu
Chemical series alkali metals
Appearance silvery gold
150px
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 7440-46-2
Physical properties
Phase
Density g/mlwarning.png" g/ml" is not a number.
Melting point 28.44 °C301.59 K
83.192 °F
542.862 °R
Boiling point 671 °C944.15 K
1,239.8 °F
1,699.47 °R
Isotopes of Cesium
iso NA half-life DT DE (MeV) DP
is stable with neutrons.
All properties are for STP unless otherwise stated.

Contents

Introduction

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]

Properties

Description

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]

Occurrences

An element of the alkali metal group, Cesium participates with Earth crust. It is occurs several minerals such as lepidolite, pollucite, amazonite.[3] Among them, one of the most important of this metal is located at Bernic Lake in Manitoba, Canada.[4]

Uses

Description

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]

Other

References


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