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Periodic Table - Elements - Caesium
| Symbol |
Cs |
|
| Atomic Number |
55 |
Relative Atomic Mass
12C = 12.0000 |
132.90543 |
Atomic Radius
pm |
265.4 |
First Ionisation Energy
kJ mol-1 |
375.7 |
| Electronegativity |
0.79 |
Density
kg m-3 |
1873 [293 K]
1843 [m.p.] |
Molar Volume
cm3 |
70.96 |
Thermal Conductivity
W m-1 K-1 |
35.9 [300 K] |
Melting Point
K |
301.55 |
Boiling Point
K |
951.6 |
| Number of Isotopes |
40 |
Ground State Electron
Configuration |
[Xe]6s1 |
| Term Symbol |
2S1/2 |
| Discovery |
Discovered by R. Bunsen and G.R. Kirchhoff (Heidelberg, Germany) in 1860 |
| Name Derived From |
Latin caesius meaning 'sky blue' |
Name in Other
Languages |
 Croatian | Cezij |
 Danish | caesium |
 Dutch | cesium |
 Finnish | cesium |
 French | césium |
 German | Caesium |
 Italian | cesio |
 Norwegian | cesium |
 Portuguese | césio |
 Spanish | cesio |
 Swedish | cesium |
 US | cesium |
| Peter van der Krogt's Element Multidict - element name translations in over 48 langauges |
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Page compiled: Wed Sep 05 18:37:53 GMT+01:00 2001
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