| Technetium ✕ | |
|---|---|
| Symbol | Tc |
| Atomic number | 43 |
| Chemical property | Transition metal |
| Origin o the name | the Greek tekhnètos meaning 'artificial' |
| Group | 7 |
| Period | 5 |
| Density (g/cm³) | 11.5 |
| Melting point (K) | 2430 |
| Boiling point (K) | 4538 |
| Electro-negativity | 1.9 |
| Abundance in earth's crust (mg/kg) | 0 |