Here's why:
* Electron Configuration: Nonmetals tend to have nearly full outer electron shells. To achieve a stable electron configuration like that of noble gases, they gain electrons.
* Electronegativity: Nonmetals have higher electronegativity than metals. This means they have a stronger attraction for electrons.
When a nonmetal gains electrons, it becomes negatively charged because it now has more electrons than protons. This negative charge is what makes it an anion.
Examples of nonmetal anions:
* Chloride ion (Cl⁻)
* Oxide ion (O²⁻)
* Nitride ion (N³⁻)
* Sulfide ion (S²⁻)
* Fluoride ion (F⁻)
