Chlorine (Cl)

Chlorine (Cl)


Atomic Number: 17

Atomic Weight: 35.4527

Melting Point: 171.65 K (-101.5°C or -150.7°F)

Boiling Point: 239.11 K (-34.04°C or -29.27°F)

Density: 0.003214 grams per cubic centimeter

Phase at Room Temperature: Gas

Element Classification: Non-metal

Period Number: 3

Group Number: 17

Group Name: Halogen

Both Chlorine isotopes, Cl-35 and Cl-37, are used to study the toxicity of environmental pollutant and are usually supplied in the form of NaCl.

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