| Attribute | Value |
|---|---|
| Symbol | Ru |
| Standard state | Solid |
| Atomic mass | 101.1 u |
| Electron configuration | [Kr]5s¹4d⁷ |
| Oxidation states |
|
| Electronegativity (pauling scale) | 2.2 |
| Atomic radius (van der waals) | 207 pm |
| Ionization energy | 7.361 eV |
| Electron affinity | 1.05 eV |
| Melting point | 2607 K |
| Boiling point | 4423 K |
| Density | 12.1 g/cm³ |
| Atomic number | 44 |
| Group name | Transition metal |
| Discovered | 1827 year |