Answer:
Bromate anion is obtained buy removing one oxygen atom from the perbromate ion
Explanation:
The given ion of per bromate ion = [tex]BrO_4^{-}[/tex]
In the perbromate ion the oxidation state of bromine atom is of +7.
On removing an oxygen atom from the given polyatomic anion we will have:
[tex]BrO_3^{-}[/tex] ion that is bromate ions.
In the bromate ion the oxidation state of bromine atom is of +5.
The structure of both anions are shown in an image attached.
