CaBr2 is an ionic compound, because the second element is a non-metal so it will form an ionic compound. The next step in naming an ionic compound, is to name each component as if they were ions. The first component is a cation so you leave the name alone. The second component is an anion, so you change the ending of bromine to "-ide" and it’s becomes bromide. The last step is to combine the names so, CaBr2 becomes Calcium bromide. The first element of the formula NBr₃ is nitrogen a nonmetal, so it will form a covalent compound. In order to name a covalent compound you have to add the prefixes to the components; the first component stays the same because it's less than one. You write the Greek prefix for the number of the second component
