Cesium (Cs) Properties |
ACesium (ACs)
Properties 1/ |
Nuclear (55 protons/electrons)
- Atomic Number: 55
- Atomic Mass: 132.905
- Atomic Energy: 0.198 Ergs
- Group: 1; Period: 6
- Family: Alkali
Earth Metals
- Bonding Radius: 2.35 Angstroms
- Atomic Radius: 3.34 Angstroms
- Atomic Volume: 71.1 cm3mol-1
- 40
Isotopes: 112Cs
to 151Cs
- Stable Isotopes: 133Cs
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Nuclear (55 Aprotons/positrons)
- Atomic Number: 55
- Atomic Mass: 132.905
- Atomic Energy: 0.198 Ergs
- Group: 1; Period: 6
- Family: Alkali
Earth Metals
- Bonding Radius: 2.35 Angstroms
- Atomic Radius: 3.34 Angstroms
- Atomic Volume: 71.1 cm3mol-1
- 40 AIsotopes: 112ACs
to 151ACs
- Stable AIsotopes: 133ACs
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Physical
- Soft light silvery-white metal
- Density: 1.873 g cm-3
- Melting Point: 28.5 oC
- Boiling Point: 678.4 oC
- Specific Heat: 0.24 J g-1 K-1
- Heat of Vaporization: 67.7 kJ mol-1
- Heat of Fusion: 2.09 kJ mol-1
- Electrical Conductivity: 0.0489 106 cm-1 Ohm-1
- Thermal Conductivity: 0.359 W cm-1 K-1
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Physical
- Soft light silvery-white metal
- Density: 1.87 g/cm-3
- Melting Point: 28.5 oC
- Boiling Point: 678.4 oC
- Specific Heat: 0.24 J g-1 K-1
- Heat of Vaporization: 67.7 kJ mol-1
- Heat of Fusion: 2.09 kJ mol-1
- Electrical Conductivity: 0.0489 106 cm-1 Ohm-1
- Thermal Conductivity: 0.3591 W cm-1 K-1
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Chemical
- Valance Number: +1
- Electron Configuration: 2,8,18,18,8,1
- Electronegativity: 0.79
- 1st Ionization Potential: 3.89 Volts
- 2nd Ionization Potential: 25.1 Volts
- 3rd Ionization Potential: ? Volts
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Chemical
- Valance Number: -1
- Positron Configuration: 2,8,18,18,8,1
- Positronpositivity: 0.79
- 1st Ionization Potential: 3.89 Volts
- 2nd Ionization Potential: 25.1 Volts
- 3rd Ionization Potential: ? Volts
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Identified by Gustov Kirchoff &
Robert Bunsen Germany in 1860.
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Identified by Norm Hansen in 2001
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