PERIODIC TABLE
Cesium
Atomic No. 55
Cs
Cesium
About Cesium
Cesium is an alkali metal with atomic number 55 that forms compounds predominantly in the +1 oxidation state. Transitions in cesium atoms provide the basis for the definition of the second, while cesium compounds are used in specialized drilling fluids. Activated cesium iodide crystals are scintillators that convert radiation into detectable light.
Properties
- Atomic Number
- 55
- Atomic Symbol
- Cs
- Atomic Mass
- 132.9055
- CAS No.
- 7440-46-2
- Density
- 1.879 g/cm³
- Series
- alkali metal
- Melting Point
- 28.44°C
- Boiling Point
- 671°C
- Thermal Conductivity
- 0.36 W/cm °C
- Heat of Fusion
- 2.09 kJ/mol
- Heat of Vaporization
- 64 kJ/mol
- Electronegativity
- 0.79 pauling
- Crystal Structure
- Cubic
- Electrical Conductivity
- 5×106 S/m
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