Ruthenium |
| Symbol | Ru |
|---|---|
| Latin name | Ruthenium |
| Atomic number | 44 |
| Period | 5 |
| Element category | Transition elements |
| Relative atomic mass | 101.07 |
| Group | VIII.B |
| Electronegativity | 2.2 |
| Oxidation numbers | 2, 3, 4, 6, 8 |
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d7 5s1 |
| Density [g/cm3] | 12.41 |
| State | Solid |
| Melting point [°C] | 2300 |
| Boiling point [°C] | 4000 |
| Atomic radius [pm] | 178 |
| Covalent radius [pm] | 126 |
| Thermal conductivity [W m-1K-1] | 117 |
| Heat capacity [J K-1g-1] | 0.238 |
| Discovery | 1843 |
| Hardness [Mohs scale] | 6.5 |
| Brinell hardness [MPa] | 2160 |
| Young's modulus [GPa] | 447 |
| Electrical conductivity [S m-1] | 1.4 · 107 |
| Shear modulus [GPa] | 173 |
| 1.st ionization energy [eV] | 7.3605 |
| 2.nd ionization energy [eV] | 16.76 |
| 3.rd ionization energy [eV] | 28.47 |
| Stable isotopes | 7 |
| Unstable isotopes | 9 |