Terbium (Tb) Properties |
ATerbium (ATb)
Properties 1/ |
Nuclear (65 protons/electrons)
- Atomic Number: 65
- Atomic Mass: 158.925
- Atomic Energy: 0.237 Ergs
- Group: 3; Period: 6
- Family: Rare Earth:
Lanthanide Series
- Bonding Radius: 1.59 Angstroms
- Atomic Radius: 2.51 Angstroms
- Atomic Volume: 19.2 cm3mol-1
- 34
Isotopes: 138Tb
to 171Tb
- Stable Isotopes: 159Tb
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Nuclear (65 Aprotons/positrons)
- Atomic Number: 65
- Atomic Mass: 158.925
- Atomic Energy: 0.237 Ergs
- Group: 3; Period: 6
- Family: Rare Earth:
Lanthanide Series
- Bonding Radius: 1.59 Angstroms
- Atomic Radius: 2.51 Angstroms
- Atomic Volume: 19.2 cm3mol-1
- 34 AIsotopes: 138ATb
to 171ATb
- Stable AIsotopes: 159ATb
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Physical
- Silvery metal
- Density: 8.27 g cm-3
- Melting Point: 1,360 oC
- Boiling Point: 3,041 oC
- Specific Heat: 0.18 J g-1 K-1
- Heat of Vaporization: 330.9 kJ mol-1
- Heat of Fusion: 10.8 kJ mol-1
- Electrical Conductivity: 0.00889 106 cm-1 Ohm-1
- Thermal Conductivity: 0.111 W cm-1 K-1
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Physical
- Silvery metal
- Density: 8.27 g/cm-3
- Melting Point: 1,360 oC
- Boiling Point: 3,041 oC
- Specific Heat: 0.18 J g-1 K-1
- Heat of Vaporization: 330.9 kJ mol-1
- Heat of Fusion: 10.8 kJ mol-1
- Electrical Conductivity: 0.00889 106 cm-1 Ohm-1
- Thermal Conductivity: 0.111 W cm-1 K-1
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Chemical
- Valance Number: +3
- Electron Configuration: 2,8,18,27,8,2
- Electronegativity: 1.2
- Ionization Energy: kcal mol-1
- 1st Ionization Potential: 5.9 Volts
- 2nd Ionization Potential: 11.5 Volts
- 3rd Ionization Potential: 21.9 Volts
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Chemical
- Valance Number: -3
- Positron Configuration: 2,8,18,27,8,2
- Positronpositivity: 1.2
- Ionization Energy: kcal mol-1
- 1st Ionization Potential: 5.9 Volts
- 2nd Ionization Potential: 11.5 Volts
- 3rd Ionization Potential: 21.9 Volts
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Identified by Carl Mosander
Sweden in 1843.
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Identified by Norm Hansen in 2001
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