| Tc | Technetium | Transition Metal |
| Atomic number: | 43 | Atomic weight: | (97.9072) | ||
| Shells: | 2,8,18,13,2 | Orbitals: | [Kr] 4d5 5s2 | ||
| Melting point: | 2172°C | Boiling point: | 4877°C | ||
| Covalent radius: | 1.27 | Å | Atomic volume: | 8.5 | cm³/mol |
| Atomic radius: | 1.95 | Å | Ionic radius: | -- | Å |
| Electronegativity: | 1.9 | Oxidation states: | (7),6,4 | ||
| 1st ionization pot.: | 7.28 | V | 2nd ionization pot.: | 15.26 | V |
| 3rd ionization pot.: | 29.54 | V | Specific heat: | 0.21 | J/gK |
| Heat of fusion: | 24.0 | kJ/mol | Heat of vapor.: | 660.0 | kJ/mol |
| Thermal conduct.: | 0.506 | W/cmK | Electrical conduct.: | 0.067 | 10^6/cm ohm |
| Density: | 11.5 | g/cm³ | Valence: | 0,2,4,5,6,7 |