What are three examples of polyatomic and monoatomic ions?

Oct 29, 2015

Monoatomic: $N {a}^{+}$, $C {l}^{-}$, $B {e}^{\text{2+}}$, ${O}^{\text{2-}}$
Polyatomic: $N {H}_{4}^{+}$, ${C}_{2} {O}_{4}^{\text{2-}}$, $B r {O}_{3}^{\text{3-}}$