Answer:
Single Elements
Explanation:
(Idk why the True/False is there). A pure substance is made up of a single element. A compound is a molecule composed of multiple atoms of different elements. A molecule is a group of atoms bonded together. All compounds are molecules, but not all molecules are compounds. This is because a molecule can be 100% one element, for example H2, which is 100% hydrogen, is a molecule but it is not a compound because it is made of only one element.
