Technetium (Tc) Properties |
ATechnetium (ATc)
Properties |
Nuclear (43 protons/electrons)
- Atomic Number: 43
- Atomic Mass: 98.91
- Atomic Energy: 0.148 Ergs
- Group: 7; Period: 5
- Family: Transition
Metals
- Bonding Radius: 1.27 Angstroms
- Atomic Radius: 1.95 Angstroms
- Atomic Volume: 8.5 cm3mol-1
- 33 Isotopes: 85Tc
to 117Tc
- Stable Isotopes: None
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Nuclear (43 Aprotons/positrons)
- Atomic Number: 43
- Atomic Mass: 98.91
- Atomic Energy: 0.148 Ergs
- Group: 7; Period: 5
- Family: Transition
Metals
- Bonding Radius: 1.27 Angstroms
- Atomic Radius: 1.95 Angstroms
- Atomic Volume: 8.5 cm3mol-1
- 33 AIsotopes: 85ATc
to 117ATc
- Stable AIsotopes: None
|
Physical
- First artificially created element
- Density: 11.5 g cm-3
- Melting Point: 2,200 oC
- Boiling Point: 4,877 oC
- Specific Heat: 0.21 J g-1 K-1
- Heat of Vaporization: 660 kJ mol-1
- Heat of Fusion: 24 kJ mol-1
- Electrical Conductivity: 0.067 106 cm-1 Ohm-1
- Thermal Conductivity: 0.506 W cm-1 K-1
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Physical
- Silver-white metal
- Density: 11.5 g/cm-3
- Melting Point: 2,200 oC
- Boiling Point: 4,877 oC
- Specific Heat: 0.21 J g-1 K-1
- Heat of Vaporization: 660 kJ mol-1
- Heat of Fusion: 24 kJ mol-1
- Electrical Conductivity: 0.067 106 cm-1 Ohm-1
- Thermal Conductivity: 0.506 W cm-1 K-1
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Chemical
- Valance Number: +4, +6, +7
- Electron Configuration: 2,8,18,13,2
- Electronegativity: 1.9
- 1st Ionization Potential: 7.3 Volts
- 2nd Ionization Potential: 15.3 Volts
- 3rd Ionization Potential: 29.5 Volts
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Chemical
- Valance Number: -4, -6, -7
- Positron Configuration: 2,8,18,13,2
- Positronpositivity: 1.9
- 1st Ionization Potential: 7.3 Volts
- 2nd Ionization Potential: 15.3 Volts
- 3rd Ionization Potential: 29.5 Volts
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Identified
by Carlo Perrier and Emillo Serge
Italy in 1937
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Identified by Norm Hansen in 2001
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