Question

what is the formula of calcium bromide? a) ca₂br b) cabr₂ c) ca₂br₂ d) cabr

Explanation:

Step1: Determine the ions

Calcium (\(Ca\)) forms \(Ca^{2+}\) ion (loses 2 electrons). Bromine (\(Br\)) forms \(Br^{-}\) ion (gains 1 electron).

Step2: Balance the charges

To balance the charges in an ionic compound, the total positive charge should equal the total negative charge. For \(Ca^{2+}\) and \(Br^{-}\), we need 2 \(Br^{-}\) ions for 1 \(Ca^{2+}\) ion.

Answer:

B. \(CaBr_{2}\)