To name the compound formed by calcium (Ca) and chlorine (Cl), we start by identifying the elements involved. Calcium is a metal located in Group 2A of the periodic table, which means it has a consistent charge of +2. Since calcium only has one oxidation state, there is no need to use a Roman numeral in its name.

Next, we consider chlorine, a nonmetal. When naming nonmetals, we take the base name of the element, which is "chlor," and add the suffix "-ide" to indicate that it is part of a compound. Therefore, the name for the compound CaCl₂ is derived from combining the names of the two elements: calcium and chloride.

In summary, the compound CaCl₂ is called calcium chloride.