44Ru
Ruthenium
루테늄 · ルテニウム
Transition metal
Atomic number44
ElementRu — Ruthenium
Atomic mass101.07
CategoryTransition metal
Group8
Period5
Electron config[Kr] 4d7 5s1
Shells2,8,18,15,1
State (RT)Solid
Melting pt2334°C
Boiling pt4150°C
Electronegativity2.2
Discovered1844
Main usesElectrical contacts, catalysts
2 · 8 · 18 · 15 · 1