When you combine fluorine and fluorine, you form a covalent bond.

Here's why:

* Fluorine is a nonmetal: Nonmetals tend to share electrons to achieve a stable electron configuration.

* Similar electronegativity: Fluorine has the highest electronegativity of all elements, meaning it attracts electrons very strongly. Since both fluorine atoms have equal electronegativity, they share the electrons equally.

Therefore, a covalent bond is formed between the two fluorine atoms, resulting in a diatomic molecule of fluorine (F₂).