17Cl
Chlorine
염소 · 塩素
Halogen
Atomic number17
ElementCl — Chlorine
Atomic mass35.45
CategoryHalogen
Group17
Period3
Electron config[Ne] 3s2 3p5
Shells2,8,7
State (RT)Gas
Melting pt-102°C
Boiling pt-34°C
Electronegativity3.16
Discovered1774
Main usesDisinfectant, PVC, bleach
2 · 8 · 7