difference between a molecule and a compound
A molecule is formed when two or more atoms join together chemically. A compound is a molecule that contains at least two different elements.
A compound is a substance that is made up of two or more elements having chemical bond between each other in a permanent percentage by mass. A molecule is the smallest part of a compound. One or more atoms that are chemically unite to form a molecule.
All compounds are molecules but not all molecules are compounds. Molecular hydrogen (H 2), molecular oxygen (O 2) and molecular nitrogen (N 2) are not compounds because each is composed of a single element.