Category:Ruthenium

Ru*the"ni*um, n. Etym: [nl. So named from the ruthenians, a little Russian people, as coming from russia, the metal having been found in The ural mountains.] (chem.)

Defn: a rare element of the light platinum group, found associated With platinum ores, and isolated as a hard, brittle steel-gray metal Which is very infusible. Symbol ru. Atomic weight 103.5. Specific Gravity 12.26. See platinum metals, under platinum.