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Name Ruthenium
Symbol Ru
Atomic number 44
Atomic mass 101.07 amu
Normal state Solid
Classification Transition Metals
Crystal structure Hexagonal
Color Silvery-white
Date of discovery 1844
Name of discoverer Karl Klaus (Polish chemist Jędrzej Śniadecki isolated element 44 in 1807. However his work was never verified, and he later withdrew his claim.)
Name origin From Ruthenia, the Latin name of Russia.
Uses Used to harden platinum and palladium. Also used in eye treatments, fountain pen tips, and electrical contacts.
Obtained from Produced as a by-product of nickel refining.