Radium (Ra) Properties |
ARadium (ARa)
Properties 1/ |
Nuclear (88 protons/electrons)
- Atomic Number: 88
- Atomic Mass: 226
- Atomic Energy: 0.337 Ergs
- Group: 2 ; Period: 7
- Family: Alkaline
Earth Metals
- Bonding Radius: ? Angstroms
- Atomic Radius: ? Angstroms
- Atomic Volume: 45.20 cm3mol-1
- 33
Isotopes: 202Ra to 234Ra
- Stable Isotopes: None
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Nuclear (88 Aprotons/positrons)
- Atomic Number:88
- Atomic Mass: 226
- Atomic Energy: 0.337 Ergs
- Group: 2 ; Period: 7
- Family: Alkaline
Earth Metals
- Bonding Radius: ? Angstroms
- Atomic Radius: ? Angstroms
- Atomic Volume: 45.20 cm3mol-1
- 33 AIsotopes: 202ARa
to 234ARa
- Stable AIsotopes: None
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Physical
- Silver white metal. Intensely radioactive
- Density: 5
g cm-3
- Melting Point: 700 oC
( o K)
- Boiling Point: 1737 oC
( o K)
- Specific Heat: 0.12
J g-1 K-1
- Heat of Vaporization: ? kJ mol-1
- Heat of Fusion: ? kJ mol-1
- Electrical Conductivity: ? 106 cm-1 Ohm-1
- Thermal Conductivity: 0.186
W cm-1 K-1
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Physical
- Silver white metal. Intensely radioactive
- Density: 5
g/cm-3
- Melting Point: 700 oC
( o K)
- Boiling Point: 1737 oC
( o K)
- Specific Heat: 0.12
J g-1 K-1
- Heat of Vaporization: ? kJ mol-1
- Heat of Fusion: ? kJ mol-1
- Electrical Conductivity: ? 106 cm-1 Ohm-1
- Thermal Conductivity: 0.186
W cm-1 K-1
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Chemical
- Valance Number: +2
- Electron Configuration: 2,8,18,32,18,8,2
- Electronegativity: 0.9
- 1st Ionization Potential: 5.28
Volts
- 2nd Ionization Potential: 10.1 Volts
- 3rd Ionization Potential: ? Volts
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Chemical
- Valance Number: -2
- Positron Configuration: 2,8,18,32,18,8,2
- Positronpositivity: 0.9
- 1st Ionization Potential: 5.28
Volts
- 2nd Ionization Potential: 10.1 Volts
- 3rd Ionization Potential: ? Volts
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Identified by Pierre and Marie Curie,
France, in 1898.
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Identified by Norm Hansen in 2001
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