Group VIIA elements chlorine

The Group VIIA elements, or halogens, are reactive. Chlorine (CI2), a pale greenish-yeUow gas, is prepared commercially hy the electrolysis of aqueous sodium chloride. Its principal uses are in the preparation of chlorinated hydrocarbons and as a bleaching agent and disinfectant. Hydrogen chloride, HCl, is one of the most important compounds of chlorine aqueous solutions of HCl are known as hydrochloric acid. 

Three of the halogens, elements from Group VIIA (left to right) chlorine, bromine, iodine. 

Elements in Group VIIA have an oxidation number of-1 when the atom is bonded to a less electronegative element. The oxidation number of each chlorine atom in CCI4 is -1. 

The halogens are the family of nonmetal elements in group 17 (VIIA) that are located just to the right of the oxygen group 16 on the periodic table of chemical elements. They are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). 

Bromine is a member of the halogen family. Halogens are the elements that make up Group 17 (VIIA) of the periodic table. The periodic table is a chart that shows how elements are related to one another. The word halogen means salt-former. Fluorine, chlorine, bromine, iodine, and astatine form salts when chemically combined with a metal. 

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