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 hydrogen, which combine to form water, or H2O. Each water molecule is a discrete entity that has two hydrogen atoms bonded to one oxygen atom.Visit site