Here's why:

* Location on the Periodic Table: Fluorine is located in Group 17 (also known as the halogens) on the periodic table, which consists entirely of nonmetals.

* Properties: Fluorine exhibits typical nonmetal properties:

* It is a gas at room temperature.

* It is a poor conductor of heat and electricity.

* It is brittle and easily shattered.

* It is highly reactive and forms negative ions (anions).

Let me know if you have any other chemistry questions!