出典:Wiktionary
出典:『Wiktionary』 (2026/04/24 23:21 UTC 版)
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| Ru Atomic number 44 ruthenium |
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| English Wikipedia article on Ruthenium |
Ruthenia + -ium. Named by Baltic German scientist Karl Ernst Claus in 1844 in honour of Russia (using the Latin name Ruthenia).
ruthenium (countable and uncountable, plural rutheniums)
| Chemical element | ||||||||
|---|---|---|---|---|---|---|---|---|
| Ru Atomic number 44 ruthenium |
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| Previous: ← technetium (Tc) | ||||||||
| Next: rhodium (Rh) → |
出典:Wikipedia
出典:『Wikipedia』 (2011/07/28 22:38 UTC 版)
Ruthenium (
/ruːˈθiːniəm/ roo-thee-nee-əm) is a chemical element represented by the symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table. Similar to the other metals of the platinum group, ruthenium is inert to most chemicals. The Russian scientist Karl Ernst Claus discovered the element in 1844 and named it after Ruthenia, the Latin word for Rus'. Ruthenium usually occurs as a minor component of platinum ores and its annual production is only about 12 tonnes worldwide. Most ruthenium is used for wear-resistant electrical contacts and the production of thick-film resistors. A minor application of ruthenium is its use in some platinum alloys.