27Co
Cobalt
코발트 · コバルト
Transition metal
Atomic number27
ElementCo — Cobalt
Atomic mass58.933
CategoryTransition metal
Group9
Period4
Electron config[Ar] 3d7 4s2
Shells2,8,15,2
State (RT)Solid
Melting pt1495°C
Boiling pt2927°C
Electronegativity1.88
Discovered1735
Main usesMagnets, batteries, blue pigment
2 · 8 · 15 · 2