Overview |
Name | Technetium |
Symbol | Tc |
Atomic Number | 43 |
Atomic Weight | 98[note] |
Density | 11.5 g/cm3 |
Melting Point | 2157 °C |
Boiling Point | 4265 °C |
Thermal properties |
Phase | Solid |
Melting Point | 2157 °C |
Boiling Point | 4265 °C |
Absolute Melting Point | 2430 K |
Absolute Boiling Point | 4538 K |
Heat of Fusion | 23 kJ/mol |
Heat of Vaporization | 550 kJ/mol |
Heat of Combustion | N/A |
Specific Heat | 63 J/(kg K)[note] |
Thermal Conductivity | 51 W/(m K) |
Thermal Expansion | N/A |
Bulk physical properties |
Density | 11.5 g/cm3 |
Density (Liquid) | N/A |
Molar Volume | 8.522×10-6 |
Thermal Conductivity | 51 W/(m K) |
Thermal Expansion | N/A |
Reactivity |
Valence | 7 |
Electronegativity | 1.9 |
ElectronAffinity | 53 kJ/mol |
Ionization Energies | |
Health and Safety |
Autoignition Point | N/A |
Flashpoint | N/A |
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Classifications |
Alternate Names | None |
Nams of Allotropes | None |
Block | d |
Group | 7 |
Period | 5 |
Electron Configuration | [Kr]4d55s2 |
Color | Silver |
Discovery | |
Gas phase | N/A |
CAS Number | CAS7440-26-8 |
Electrical properties |
Electrical Type | Conductor |
Electrical Conductivity | 5×106 S/m |
Resistivity | 2×10-7 m Ω |
Superconducting Point | 7.8 |
Magnetic properties |
Magnetic Type | N/A |
Curie Point | N/A |
Mass Magnetic Susceptibility | 3.42×10-8 |
Molar Magnetic Susceptibility | 3.352×10-9 |
Volume Magnetic Susceptibility | 0.0003933 |
Abundances |
% in Universe | N/A |
% in Sun | None |
% in Meteorites | None |
% in Earth's Crust | None |
% in Oceans | None |
% in Humans | None |
Atomic dimensions and structure |
Atomic Radius | 183 pm |
Covalent Radius | 156 pm |
Van der Waals Radius | N/A |
Crystal Structure | Simple Hexagonal |
Lattice Angles | |
Lattice Constants | |
Space Group Name | P63/mmc |
Space Group Number | 194 |
Nuclear Properties |
Half-Life | 4.12×106 y |
Lifetime | 6.02×106 y |
Stable Isotopes | |
Isotopic Abundances | |
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