17Cl

Chlorine

Reactive Nonmetal

Chlorine (Cl) is element 17, a reactive nonmetal, in period 3 and group 17 of the periodic table. Its standard atomic weight is 35.45, it melts at -101.5 °C and boils at -34.04 °C. Discovered by Carl Wilhelm Scheele, 1774.

Atomic Number17

SymbolCl

NameChlorine

Atomic Weight35.45 u

CategoryReactive Nonmetal

Period3

Group17

Melting Point-101.5 °C

Boiling Point-34.04 °C

Density0.00295 g/cm³

Electron Config[Ne] 3s2 3p5

Discovered ByCarl Wilhelm Scheele, 1774

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