Question

part a
what is the correct name for the bro₄ ¹⁻ ion?
○ hypobromite
○ bromate
○ perbromate
○ bromite
○ none of the above

Explanation:

Step1: Recall oxyanion naming rules

Oxyanions with bromine: The base oxyanion is bromate ($\text{BrO}_3^-$). When there's one more O (4 O atoms), we use the prefix "per-".

Step2: Identify the ion

The ion is $\text{BrO}_4^-$. Comparing to bromate ($\text{BrO}_3^-$), it has an extra O. So we add "per-" to bromate, resulting in perbromate.

Answer:

C. perbromate