Question

a calcium bromide compound is represented by which formula? a ca2br b ca2br2 c cabr d cabr2

Explanation:

Step1: Determine ion charges

Calcium (Ca) is in group 2 of the periodic - table and has a +2 charge ($Ca^{2 +}$). Bromine (Br) is in group 17 and has a -1 charge ($Br^{-}$).

Step2: Balance charges

To form a neutral compound, we need 2 bromide ions ($Br^{-}$) to balance the +2 charge of one calcium ion ($Ca^{2+}$). So the chemical formula is $CaBr_{2}$.

Answer:

The formula for calcium bromide is $CaBr_{2}$, so the correct option is not shown in the provided description (assuming the correct one should be $CaBr_{2}$ among the choices in the original multiple - choice question). If we assume the choices are A. $CaBr$, B. $Ca_{2}Br$, C. $CaBr_{2}$, D. $Ca_{2}Br_{2}$, the answer is C. $CaBr_{2}$.