Final answer:
The correct name for the binary ionic compound CaBr₂ is 'd. calcium bromide'. Prefixes like 'di-' or 'mono-'are not necessary in this case since the charges on calcium and bromide ions are understood from the chemical formula.
Step-by-step explanation:
The proper name for the binary ionic compound CaBr₂ is d. calcium bromide. In naming binary ionic compounds, the cation (positive ion) is named first followed by the anion (negative ion). The metal keeps its name and is followed by the name of the non-metal with its ending changed to –ide. Since calcium is a metal that forms cations with a predictable charge (Ca²+), we do not need to indicate its charge. Bromine, the non-metal, becomes “bromide” when it is in an ionic compound. Therefore, there is no need for prefixes such as “di-” or “mono-” because they are not used in traditional ionic compound naming. So, the correct name is simply calcium bromide, which indicates one calcium ion and two bromide ions in the formula unit.