Question

32.When the calcium ion, Ca+2, combines with the iodide ion, I-, the formula for the compound is...Select one:a. CaIb. CaI2c. CaI3d. Ca2I

Answer 1

Since calcium has a charge of +2 and Iodine has a charge of -1, we need two iodines in order to match the charge and electrons that calcium gave up, therefore we will have CaI2 as the correct molecular formula for this compound. Letter B