Technetium vs Ruthenium
Pick up to 3 elements and see how they stack up.
| Property | Technetium | Ruthenium |
|---|---|---|
| Atomic number | 43 | 44 |
| Atomic mass | 98 | 101.07 |
| Electronegativity | 1.9 | 2.2 |
| Melting point | 2,430 K (2,156.8 °C) | 2,607 K (2,333.8 °C) |
| Boiling point | 4,538 K (4,264.8 °C) | 4,423 K (4,149.8 °C) |
| Density | 11 g/cm³ | 12.45 g/cm³ |
| Atomic radius | 209 pm | 207 pm |
| Ionization energy | 7.28 eV | 7.361 eV |
| Discovered | 1937 | 1844 |
| Category | Transition metal | Transition metal |
| State at room temp. | Solid | Solid |
| Block | d | d |
| Group | 7 | 8 |
| Period | 5 | 5 |
| Valence electrons | 2 | 1 |
| Common charges | +4, +6, +7 | +3 |
| Electron configuration | [Kr] 4d5 5s2 | [Kr] 4d7 5s1 |