Question

part d
calcium and iodine
express your answer as a chemical formula.
a chemical reaction does not occur for this question.

Explanation:

Step1: Determine the ions

Calcium (\(Ca\)) forms \(Ca^{2+}\) ion (loses 2 electrons as it is in group 2). Iodine (\(I\)) forms \(I^{-}\) ion (gains 1 electron as it is in group 17).

Step2: Use charge balance

To balance the charges, we need 2 \(I^{-}\) ions for 1 \(Ca^{2+}\) ion.

Answer:

\(CaI_{2}\)