A stable, binary ionic compound exists where the cation (A) has a charge twice in magnitude than that of the anion (X). What would be the correct formula for this compound? A) A2X B) A2X4 C) A4X2 D) AX2

The cation is positively charged and has a charge twice that of the anion, for example + 2. The anion is negatively charged and in our example where the cation has a + 2 charge, it must have a - 1 charge. In order for the charges to equal zero, there must be two anions: - 1 x 2 = - 2 So the answer is D. AX2