Final answer:
The incorrect ion name and symbol match is option (c), which should be aluminum cation, Al 3+, not Al 3-.
Step-by-step explanation:
The question is asking which of the given options does not correctly match the ion name with its ion symbol. The incorrect match is option (c), aluminum cation, Al 3-. Aluminum forms a cation with a charge of 3+, not 3-. Therefore, the correct symbol should be Al3+, not Al3-. The charges for the other ions are correctly matched: magnesium forms a Mg2+ cation, barium forms a Ba2+ cation, and iodide is a I- anion.