Technetium
Transition metal| Atomic number | 43 |
|---|---|
| Category | Transition metal |
| Atomic mass | 98 |
| Electron configuration | [Kr]4d⁵ 5s² |
| Oxidation states | +4, +7 |
| Electronegativity | 1.9 |
| Melting point | 2,157 °C |
| Boiling point | 4,265 °C |
| Density | 11 g/cm³ |
| Crystal structure | Close-packed hexagonal |
| Group | 7 |
| Period | 5 |
| Block | d |
| Discovered | 1,937 |
| Crustal abundance | 0 ppm |