* Manganese(IV) tells us the manganese ion has a +4 charge (Mn⁴⁺).
* Iodide is the anion of iodine, which has a -1 charge (I⁻).
To balance the charges, we need four iodide ions (4 x -1 = -4) to neutralize the +4 charge of the manganese ion.
Therefore, the chemical formula for manganese(IV) iodide is MnI₄.
