What is atom and molecule?

A molecule is the smallest particle in a chemical? element?or?compound?that has the chemical properties of that element or compound. Molecules are made up of? atoms?that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of?electrons?among atoms. The atoms of certain elements readily bond with other atoms to form molecules. Examples of such elements are oxygen and chlorine. The atoms of some elements do not easily bond with other atoms. Examples are neon and argon.