Question

what is the correct formula for calcium fluoride?

Explanation:

Step1: Determine the valency of calcium and fluoride

Calcium (\(Ca\)) has a valency of \(+2\), and fluoride (\(F\)) has a valency of \(-1\).

Step2: Apply the criss - cross method

Using the criss - cross method, we get the formula \(CaF_{2}\).

Answer:

C. \(CaF_{2}\)