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Atomic symbol - Ru
Atomic weight - 101.07
Atomic number - 44
Electron configuration - 2-8-18-15-1
Oxidation states - +3
State of matter - solid
Heavy metal-ductile
Discovered in 1844 by Karl Karlovich Klaus
Boils at 3900 .C, melts at 2250 .C

Notes:
Ruthenium is useful in hardening platinum and palladium as an alloy. Silver-
gray ruthenium looks like platinum but is harder, more brittle, and rarer.
Ruthenium is found among the fission outputs of uranium and plutonium in
nuclear reactors. Ruthenium has four allotropic forms. The metal doesn't
tarnish in air at normal temperatures and resists attack to many strong acids.

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