PERIODIC ELEMENT
Ru (Ruthenium)
| Atomic number | : | 44 |
| Atomic mass | : | 101.1 g.mol-1 |
| Electronegativity according to Pauling | : | 2.2 |
| Density | : | 12.2 g.cm-3 at 20 °C |
| Melting point | : | 2250 °C |
| Boiling point | : | 4150 °C |
| Vanderwaals radius | : | 0.135 nm |
| Isotopes | : | 11 |
| Electronic shell | : | [Kr] 4d75s1 |
| Energy of first ionisation | : | 722.4 kJ.mol-1 |
| Energy of second ionisation | : | 1620 kJ.mol-1 |
| Energy of third ionisation | : | 2747 kJ.mol-1 |
| Standard Potential | : | - 0.45 V |
| Discovered by | : | Karl Klaus in 1844 |
| Atomic Structure | Uses (platinum alloys) | |