49In
Indium
인듐 · インジウム
Post-transition
Atomic number49
ElementIn — Indium
Atomic mass114.82
CategoryPost-transition
Group13
Period5
Electron config[Kr] 4d10 5s2 5p1
Shells2,8,18,18,3
State (RT)Solid
Melting pt157°C
Boiling pt2072°C
Electronegativity1.78
Discovered1863
Main usesTouchscreens (ITO), solders
2 · 8 · 18 · 18 · 3