Here's why:

* Halogens are a group of non-metal elements found in group 17 (or VIIa) of the periodic table.

* Chlorine (Cl) is located in this group, alongside fluorine (F), bromine (Br), iodine (I), and astatine (At).

* Halogens share similar chemical properties, such as being highly reactive and forming salts with metals.