Atomic symbol: Ru
Atomic number: 44
Atomic mass: 101.07
Appearance: Silvery white solid at 25°C
Series: Transition metals
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d⁷ 5s¹
Inert, though some compounds are highly toxic.
Very rare metal used in electronics.
Fun Fact! Ruthenium is sometimes used in the nibs of Parker pens.