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Cl

Chlorine

#17 · Reactive Nonmetal

Mass35.45 u
Density0.003214 g/cm³
Melting171.6 K
Boiling239.11 K
Electronegativity3.16
Ionization Energy1251.2 kJ/mol
Atomic Radius79.0 pm
Blockp-block
State (RT)Gas
Config[Ne] 3s2 3p5
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