Here's why:

* Nonmetals tend to have high electronegativity, meaning they strongly attract electrons.

* Covalent bonding occurs when two atoms share electrons to achieve a stable electron configuration. This sharing allows both atoms to "fill up" their outermost electron shells.

Example: Oxygen (O) and Hydrogen (H) are both nonmetals. They react to form water (H₂O) through covalent bonding.

Let me know if you'd like to explore other types of bonding!