Question 9 • IA-Chemistry A Survey of Chemistry A
Magnesium forms a 2+ ion (Mg²⁺), and bromine forms a 1− ion (Br⁻). Two bromide ions are needed to balance the charge of one magnesium ion, so the neutral formula is MgBr₂. The correct choice is MgBr₂.
AI-written and checked against the verified answer.