Dictionary
Gramatyka angielska
Word: Ruthenium
ID Word Wordtype Definition 133548 Ruthenium n. 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.
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