Europium (Eu) Properties |
AEuropium (AEu)
Properties 1/ |
Nuclear (63 protons/electrons)
- Atomic Number: 63
- Atomic Mass: 151.964
- Atomic Energy: 0.227 Ergs
- Group: 3; Period: 6
- Family: Rare Earth:
Lanthanide Series
- Bonding Radius: 1.85 Angstroms
- Atomic Radius: 2.56 Angstroms
- Atomic Volume: 28.9 cm3mol-1
- 37
Isotopes: 131Eu to 167Eu
- Stable Isotopes: 151Eu,
153Eu
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Nuclear (63 Aprotons/positrons)
- Atomic Number: 63
- Atomic Mass: 151.964
- Atomic Energy: 0.227 Ergs
- Group: 3; Period: 6
- Family: Rare Earth:
Lanthanide Series
- Bonding Radius: 1.85 Angstroms
- Atomic Radius: 2.56 Angstroms
- Atomic Volume: 28.9 cm3mol-1
- 37 A Isotopes: 131AEu
to 167AEu
- Stable A Isotopes: 151AEu,
153AEu
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Physical
- Soft silver metal
- Density: 5.26 g cm-3
- Melting Point: 822 oC
- Boiling Point: 1,597 oC
- Specific Heat: 0.18 J g-1 K-1
- Heat of Vaporization: 143.5 kJ mol-1
- Heat of Fusion: 9.21 kJ mol-1
- Electrical Conductivity: 0.0112 106 cm-1 Ohm-1
- Thermal Conductivity: 0.139 W cm-1 K-1
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Physical
- Soft silver metal
- Density: 5.26 g/cm-3
- Melting Point: 822 oC
- Boiling Point: 1,597 oC
- Specific Heat: 0.18 J g-1 K-1
- Heat of Vaporization: 143.5 kJ mol-1
- Heat of Fusion: 9.21 kJ mol-1
- Electrical Conductivity: 0.0112 106 cm-1 Ohm-1
- Thermal Conductivity: 0.139 W cm-1 K-1
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Chemical
- Valance Number: +2, +3
- Electron Configuration: 2,8,18,25,8,2
- Electronegativity: 1.2
- 1st Ionization Potential: 5.7 Volts
- 2nd Ionization Potential: 11.2 Volts
- 3rd Ionization Potential: 24.9 Volts
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Chemical
- Valance Number: -2, -3
- Positron Configuration: 2,8,18,25,8,2
- Positronpositivity: 1.2
- 1st Ionization Potential: 5.7 Volts
- 2nd Ionization Potential: 11.2 Volts
- 3rd Ionization Potential: 24.9 Volts
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Identified by Eugene Demarcay,
France, in 1901.
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Identified by Norm Hansen in 2001
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