Name :  Chlorine
Symbol :  Cl
Atomic Number :  17
Atomic Weight :  35.4527
Specific Heat :  0.48 J/gK
Melting Point :  -100.98°C
Vaporization :  10.20 kJ/mol
Boiling Point :  -34.6°C
Electronegativity :  3.16
Density@293 K :  0.003214 g/cm³
Discovered :  Carl Wilhelm Scheele, Sweden, 1774
Description :  Greenish-yellow, disagreeable gas. Never found in free form in nature.
Uses :  Used in water purification, bleaches, acids and many, many other compounds such as chlorofluorocarbons (CFC).