where was ruthenium discovered
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where was ruthenium discovered, when was ruthenium discovered, who discovered ruthenium, how was ruthenium discovered, when was ruthenium first discovered, who discovered the element ruthenium, where is ruthenium found, where to find ruthenium, where is ruthenium mined, what is ruthenium named after, interesting facts about ruthenium, ruthenium origin of name, where was rhenium discovered, the chemistry of ruthenium, ruthenium production by country, melting point of ruthenium, ruthenium on the periodic table, atomic number of ruthenium, what color is ruthenium, what type of element is ruthenium, ruthenium in organic synthesis, element named after ruthenia