Chlorine is the most important element of a family of very - TopicsExpress

Chlorine is the most important element of a family of very reactive non-metals known as the halogens(salt formers). The halogens are found in Group 7 of the Periodic Table. Each halogen atom has seven valence electrons. This accounts for the similarity in the chemical properties of the halogens. Chlorine was first discovered by scheele in 1774 when he heated some concentrated hydrochloric acid with manganese(iv)oxide. In 1810, Davy named the gas chlorine, a derivative of the Greek word chloros, meaning greenish-yellow. Chlorine does not occur free in nature because it is too reactive. Instead, it is usually found in the combined state as chlorides. The most abundant of these is sodium chloride or common salt, which is found both in the sea and as sea deposits.

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