Final answer:
The ionic compound that forms between Br- and Ca2+ is calcium bromide (CaBr2).
Step-by-step explanation:
The ionic compound that forms between Br- and Ca2+ is calcium bromide. The formula for this compound is CaBr2. In calcium bromide, the Ca2+ ion has a charge of +2, while the Br- ion has a charge of -1. The charges of the ions are balanced in the compound, resulting in the formula CaBr2.