Ru
Ruthenium
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Ru |
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Ruthenium |
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| Atomic number | 44 |
| Atomic weight | 101.07 |
| Orbital electronic configuration | (Kr)4d75s1 |
| First ionization energy (eV) | 7.37 |
| Second ionization energy (eV) | 16.76 |
| Third ionization energy (eV) | 28.46 |
| Electronegativity (Pauling) | 2.2 |
| Atomic radius (Å) | 1.89 |
| Bonding radius (Å) | 1.25 |
| Oxidation states | 2, 3, 4, 6, 8 |
Properties |
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| Density (g/ml) | 12.2 |
| Melting point (K) | 2523 |
| Boiling point (K) | 4423 |
| Heat of vaporization (kJ/mol) | 595.0 |
| Heat of fusion (kJ/mol) | 24.0 |
| Specific heat capacity (Jg-1K-1) | 0.238 |
| Crystal structure | hexagonal |