53I
Iodine
아이오딘 · ヨウ素
Halogen
Atomic number53
ElementI — Iodine
Atomic mass126.9
CategoryHalogen
Group17
Period5
Electron config[Kr] 4d10 5s2 5p5
Shells2,8,18,18,7
State (RT)Solid
Melting pt114°C
Boiling pt184°C
Electronegativity2.66
Discovered1811
Main usesDisinfectant, thyroid health
2 · 8 · 18 · 18 · 7