Question

what is the name of the ionic compound $znbr_{2}$?
zinc(i) bromide
zinc bromide(iii)
zinc bromide
zinc(ii) bromide(iv)

Explanation:

Ionic compounds are named by stating the cation first, followed by the anion. Zinc (\(Zn\)) forms \(Zn^{2+}\) ions. Bromine (\(Br\)) forms \(Br^{-}\) ions. In \(ZnBr_{2}\), the charge on zinc is \(+2\), but for zinc (a metal with a fixed charge in common compounds), the Roman numeral is not necessary as it only has one common oxidation state (\(+2\)) in such compounds. The anion is bromide (\(Br^{-}\)). So the name is zinc bromide.

Answer:

zinc bromide