Rubidium (Rb) Properties |
ARubidium (ARb)
Properties 1/ |
Nuclear (37 protons/electrons)
- Atomic Number: 37
- Atomic Mass: 85.468
- Atomic Energy: 0.128 Ergs
- Group: 1; Period: 5
- Family: Alkali
Earth Metals
- Bonding Radius: 2.16 Angstroms
- Atomic Radius: 2.98 Angstroms
- Atomic Volume: 55.9 cm3mol-1
- 32
Isotopes: 71Rb
to 102Rb
- Stable Isotopes: 85Rb,
87Rb
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Nuclear (37 Aprotons/positrons)
- Atomic Number:37
- Atomic Mass: 85.468
- Atomic Energy: 0.128 Ergs
- Group: 1; Period: 5
- Family: Alkali
Earth Metals
- Bonding Radius: 2.16 Angstroms
- Atomic Radius: 2.98 Angstroms
- Atomic Volume: 55.9 cm3mol-1
- 32 AIsotopes: 71ARb
to 102ARb
- Stable AIsotopes: 85ARb,
87ARb
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Physical
- Soft silver white metal
- Density:1.53g cm-3
- Melting Point: 38.9 oC
- Boiling Point: 688 oC
- Specific Heat: 0.363 J g-1 K-1
- Heat of Vaporization: 72.2 kJ mol-1
- Heat of Fusion: 2.19 kJ mol-1
- Electrical Conductivity: 0.0779 106 cm-1 Ohm-1
- Thermal Conductivity: 0.582 W cm-1 K-1
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Physical
- Soft silver white metal
- Density: 1.53 g/cm-3
- Melting Point:38.9 oC
- Boiling Point: 688 oC
- Specific Heat: 0.363 J g-1 K-1
- Heat of Vaporization:72.2 kJ mol-1
- Heat of Fusion: 2.19 kJ mol-1
- Electrical Conductivity: 0.0779 106 cm-1 Ohm-1
- Thermal Conductivity: 0.582 W cm-1 K-1
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Chemical
- Valance Number: +1
- Electron Configuration: 2,8,18,8,1
- Electronegativity: 0.82
- 1st Ionization Potential: 4.2 Volts
- 2nd Ionization Potential: 27.3 Volts
- 3rd Ionization Potential: 40 Volts
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Chemical
- Valance Number: -1
- Positron Configuration: 2,8,18,8,1
- Positronpositivity: 0.82
- 1st Ionization Potential: 4.2 Volts
- 2nd Ionization Potential: 27.3 Volts
- 3rd Ionization Potential: 40
Volts
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Identified by R. Bunsen, G.
Kirchoff,
Germany, in 1861
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Identified by Norm Hansen in 2001
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