CoBr would be considered a compound. A compound is a substance composed of two or more different elements chemically bonded together. In this case, "Co" represents cobalt, and "Br" represents bromine, and when they are chemically bonded together, they form the compound cobalt bromide (CoBr). A molecule, on the other hand, can be a single element or a combination of elements, but it represents the smallest unit of a chemical substance that retains its chemical properties. In the case of CoBr, it's a combination of elements, making it a compound.