* BrO₄⁻: Perbromate ion

* SeO₃²⁻: Selenite ion

Let's break down why:

* Per- prefixes: The "per-" prefix in "perbromate" indicates that bromine (Br) is in its highest possible oxidation state (+7) in this ion.

* -ate suffix: The "-ate" suffix signifies that the ion is an oxyanion, meaning it contains oxygen.

* -ite suffix: The "-ite" suffix for "selenite" indicates that selenium (Se) is in a lower oxidation state (+4) compared to its highest possible (+6).

Let me know if you have any other chemical compounds you need help naming!