Here's why:

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

* Fluorine (F) is the first and lightest element in the halogen group.

Other halogens include chlorine (Cl), bromine (Br), iodine (I), and astatine (At). They share similar chemical properties, such as:

* They are highly reactive nonmetals.

* They readily form negative ions (anions) with a -1 charge.

* They are found in many compounds.

Let me know if you'd like to know more about fluorine or halogens!