76Os
Osmium
오스뮴 · オスミウム
Transition metal
Atomic number76
ElementOs — Osmium
Atomic mass190.23
CategoryTransition metal
Group8
Period6
Electron config[Xe] 4f14 5d6 6s2
Shells2,8,18,32,14,2
State (RT)Solid
Melting pt3033°C
Boiling pt5012°C
Electronegativity2.2
Discovered1803
Main usesHard alloys, fountain-pen tips
2 · 8 · 18 · 32 · 14 · 2