43 Tc
Transition metal
Technetium
First artificially produced element.
Properties of Technetium
- Atomic number (Z)
- 43
- Symbol
- Tc
- Atomic mass
- 98 g/mol
- Category
- Transition metal
- Group
- 7
- Period
- 5
- Electron configuration
- [Kr] 4d⁵ 5s²
- Electronegativity (Pauling)
- 1.9
- Atomic radius
- 183 pm
- First ionization energy
- 702 kJ/mol
- Melting point
- 2430 K (2156.8 °C)
- Boiling point
- 4538 K (4264.9 °C)
- Density
- 11.5 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1937