Final answer:
The chemical formula CaCl2 represents the compound calcium chloride, which is composed of one calcium ion and two chloride ions.
Step-by-step explanation:
The chemical formula CaCl2 represents the compound calcium chloride. Calcium chloride is an ionic compound composed of one calcium ion (Ca2+) and two chloride ions (Cl-). The formula indicates that there is one calcium atom and two chloride atoms present in the compound.