Chlorine in an element of the halogen group. The halogen group is comprised of fluorine, bromine and iodine. These elements have only one electron missing. They are very reactive. After fluorine, chlorine is the most reactive, non metal element.
Chlorine is among the 20 most abundant elements. In one ton of sea water, there is an average of 1.6kg of chlorine. But in sea water as well as in natural mineral formations, chlorine exists in the safe, inorganic form as the safe negative chlorid ion (salt - NaCl).Read more