Here's why:

* Electronegativity: Fluorine is the most electronegative element. This means it has a strong pull on electrons.

* Sharing Electrons: When two fluorine atoms bond, they share their electrons equally to form a stable, nonpolar covalent bond.

Important Note: While fluorine forms covalent bonds within the F₂ molecule, it can form ionic bonds with metals due to its high electronegativity. For example, in sodium fluoride (NaF), fluorine gains an electron from sodium, creating an ionic bond.