Thalium (Tl) Properties |
AThalium (ATl)
Properties 1/ |
Nuclear (81 protons/electrons)
- Atomic Number: 81
- Atomic Mass: 204.38
- Atomic Energy: 0.305 Ergs
- Group: 13; Period: 6
- Family: Other Metals
- Bonding Radius: 1.48 Angstroms
- Atomic Radius: 2.08 Angstroms
- Atomic Volume: 17.2 cm3mol-1
- 34
Isotopes: 177Tl
to 210Tl
- Stable Isotopes: 203Tl,
205Tl
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Nuclear (81 Aprotons/positrons)
- Atomic Number: 81
- Atomic Mass: 204.38
- Atomic Energy: 0.305 Ergs
- Group: 13; Period: 6
- Family: Other Metals
- Bonding Radius: 1.48 Angstroms
- Atomic Radius: 2.08 Angstroms
- Atomic Volume: 17.2 cm3mol-1
- 34 AIsotopes: 177ATl
to 210ATl
- Stable AIsotopes: 203ATl,
205ATl
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Physical
- Soft bluish-gray metal, looks like lead
- Density: 11.85 g cm-3
- Melting Point: 303.5 oC
- Boiling Point: 1,457 oC
- Specific Heat: 0.13 J g-1 K-1
- Heat of Vaporization: 164.1 kJ mol-1
- Heat of Fusion: 4.14 kJ mol-1
- Electrical Conductivity: 0.0617 106 cm-1 Ohm-1
- Thermal Conductivity: 0.461 W cm-1 K-1
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Physical
- Soft bluish-gray metal, looks like lead
- Density: 11.85 g/cm-3
- Melting Point: 303.5 oC
- Boiling Point: 1,457 oC
- Specific Heat: 0.13 J g-1 K-1
- Heat of Vaporization: 164.1 kJ mol-1
- Heat of Fusion: 4.14 kJ mol-1
- Electrical Conductivity: 0.0617 106 cm-1 Ohm-1
- Thermal Conductivity: 0.461 W cm-1 K-1
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Chemical
- Valance Number: +1, +3
- Electron Configuration: 2,8,18,32,18,3
- Electronegativity: 2.04
- 1st Ionization Potential: 6.1 Volts
- 2nd Ionization Potential: 20.4 Volts
- 3rd Ionization Potential: 29.8 Volts
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Chemical
- Valance Number: -1, -3
- Positron Configuration: 2,8,18,32,18,3
- Positronpositivity: 2.04
- 1st Ionization Potential: 6.1 Volts
- 2nd Ionization Potential: 20.4 Volts
- 3rd Ionization Potential: 29.8 Volts
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Identified by by Sir William
Crookes,
England, in 1861.
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Identified by Norm Hansen in 2001
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