| Property | Value |
|---|---|
| Atomic number | 43 |
| Atomic weight | 98.9063 amu |
| Element family | Transition metals |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | None |
| Previous element | Molybdenum |
| Next element | Ruthenium |
| Density | 11.5 g/cm3 (STP) |
| Melting | 2200 °C |
| Boiling | 5030 °C |
| Covalent radius | 1.28 Å |
| Ionic radius | 0.56 Å |
| Metallic radius | 1.36 Å |
| First ionization potential | 7.276 eV |
| Electron affinity | 0.550 eV |
| Electronegativity | 1.9 |
| Discovery year | 1937 |
Technetium is an element number 43 from transition metals family. Its symbol is Tc. Technetium atomic weight is 98.9063 amu. Tc has no stable or long lived isotopes. Technetium electronic configuration is 1s22s22p63s23p63d104s24p65s24d5. Technetium density is 11.5 g/cm3 (STP). Technetium melting point is 2200 °C. Technetium boiling point is 5030 °C. Technetium covalent radius is 1.28 Å. Technetium ionic radius is 0.56 Å. Technetium covalent radius is 1.36 Å. Technetium first ionization potential is 7.276 eV. Technetium first ionization potential is 0.550 eV. Technetium electronegativity by Pauling scale is 1.9. Technetium was discovered in 1937.
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