ToolBoxy
90Th

Thorium

토륨 · トリウム

Actinide

Atomic number90
ElementThThorium
Atomic mass232.04
CategoryActinide
Group3
Period7
Electron config[Rn] 6d2 7s2
Shells2,8,18,32,18,10,2
State (RT)Solid
Melting pt1750°C
Boiling pt4788°C
Electronegativity1.3
Discovered1829
Main usesNuclear fuel, gas mantles
Th90
2 · 8 · 18 · 32 · 18 · 10 · 2
Bohr model

Group 3