Details : Item 215
| 1 | 2 | 3 | 4 | 5 | 6 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Alkali metals |  |  |  |  |  |  | |||||
| Alkaline earth metal |  |  |  |  |  |  | |||||
| Transition metals I |  |  |  |  |  |  | |||||
| Transition metals II |  |  |  |  |  |  | |||||
| Transition metals III |  |  |  |  |  |  | |||||
| Transition metals IV |  |  |  |  |  |  | |||||
| Post-transition metal |  |  |  |  | | | |||||
| Metalloid | | | | | | | |||||
| Diatomic non-metal | | | | | | | |||||
| Noble gas | | | | | | | |||||
| Other | | | | | | | |||||
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| Famille : Transition metals III/2 |
|---|
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| Ruthenium |
| Symbol: Ru, phase: solid, silvery white metallic. Named after the Russian empire which Latin name is Ruthenia. Most ruthenium produced is used in wear-resistant electrical contacts and thick-film resistors. |
| Properties | |
|---|---|
| Atomic number | 44 |
| Atomic weight | 101.07 |
| Melting point (K) | 2607 |
| Boiling point (K) | 4423 |
| Speed of sound (m/s) | 5970 |
| Discovery | 1844 (K. E. Claus) |