Holmium (Ho) Properties |
AHolmium (AHo)
Properties 1/ |
Nuclear (67 protons/electrons)
- Atomic Number: 67
- Atomic Mass: 164.930
- Atomic Energy: 0.246 Ergs
- Group: 3; Period: 6
- Family: Rare Earth:
Lanthanide Series
- Bonding Radius: 1.58 Angstroms
- Atomic Radius: 2.47 Angstroms
- Atomic Volume: 18.7 cm3mol-1
- 35
Isotopes: 141Ho to 175Ho
- Stable Isotopes: 165Ho
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Nuclear (67 Aprotons/positrons)
- Atomic Number: 67
- Atomic Mass: 164.930
- Atomic Energy: 0.246 Ergs
- Group: 3; Period: 6
- Family: Rare Earth:
Lanthanide Series
- Bonding Radius: 1.58 Angstroms
- Atomic Radius: 2.47 Angstroms
- Atomic Volume: 18.7 cm3mol-1
- 35 AIsotopes: 141AHo
to 175AHo
- Stable AIsotopes: 165AHo
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Physical
- Silver colored metal
- Density: 8.80 g cm-3
- Melting Point: 1,470 oC
- Boiling Point: 2,720 oC
- Specific Heat: 0.16J g-1 K-1
- Heat of Vaporization: 241 kJ mol-1
- Heat of Fusion: 12.2 kJ mol-1
- Electrical Conductivity: 0.0124 106 cm-1 Ohm-1
- Thermal Conductivity: 0.162 W cm-1 K-1
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Physical
- Silver colored metal
- Density: 8.80 g/cm-3
- Melting Point: 1,470 oC
- Boiling Point: 2,720 oC
- Specific Heat: 0.16 J g-1 K-1
- Heat of Vaporization: 241 kJ mol-1
- Heat of Fusion: 12.2 kJ mol-1
- Electrical Conductivity: 0.0124 106 cm-1 Ohm-1
- Thermal Conductivity: 0.162 W cm-1 K-1
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Chemical
- Valance Number: +3
- Electron Configuration: 2,8,18,29,8,2
- Electronegativity: 1.23
- 1st Ionization Potential: 6.0 Volts
- 2nd Ionization Potential: 11.8 Volts
- 3rd Ionization Potential: 22.8 Volts
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Chemical
- Valance Number: -3
- Positron Configuration: 2,8,18,29,8,2
- Positronpositivity: 1.23
- 1st Ionization Potential: 6.0 Volts
- 2nd Ionization Potential: 11.8 Volts
- 3rd Ionization Potential: 22.8 Volts
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Identified by J. L. Soret
Switzerland in 1878.
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Identified by Norm Hansen in 2001
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