## Chemistry 10th Edition

(a)$Mg^{2+}$, it is monoatomic and it is a cation (b) $SO_{3} ^{2-}$, it is polyatomic and it is an anion (c) $Cu^{1+}$, it is monoatomic and it is a cation (d) $NH_{4} ^{1+}$it is polyatomic and it is a cation (e)$O^{2-}$ it is monoatomic and it is an anion