Chlorine (Cl) Chlorine (Cl)
Chlorine, a member of the halogen family, is a green, toxic gas. It is useful to humans because of its relative abundance and its desirable properties. Even though it is highly toxic in the natural gas form, its ions are essential to life. Because of chlorine, we can make drinking water safe, destroy germs, produce medicines, and have salt needed for a balanced diet. Chlorine is never found in a free state; it combines with almost all elements. It is most commonly seen as a compound NaCl, in salt or seawater.
Basic Properties of Chlorine
| atomic mass | 35.453 |
| atomic number | 17 |
| melting point | -100.98 *C |
| boiling point | -34.6 *C |
| density in natural state | 1.56 g/cm |
The gas form of chlorine is a respiratory irritant because it irritates the mucous membranes . The liquid form of chlorine burns the skin. Chlorine can be fatal after only a few deep breaths.
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Natural abundance and location