Atomic Number 44     Atomic Mass 101.07     Density 12.30 g/mL

State solid     Color silvery white     Electronegativity 2.2

Melting Point 2310°C     Boiling Point 3900°C

Natural Isotopes Ru-96 5.52%   Ru-98 1.88%    Ru-99 12.7%
Ru-100 12.6%   Ru-101 17.0%   Ru-102 31.6%   Ru-104 18.7%

Abbreviated Electron Configuration [Kr] 4d⁷ 5s¹

Discovered by Karl Klaus in 1808.