Question

what is the difference between atom and molecule

Answer 1

Atom------ The atom is the basic building block for all matter in the universe. Atoms are extremely small and are made up of a few even smaller particles. The basic particles that make up an atom are electrons, protons, and neutrons. Atoms fit together with other atoms to make up matter. 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.

Answer 2

the atom is the smallest particle of an element or substance
ex:H2=2 atoms of hydrozen
the molecule is the smallest particle of an element or coumpound.
ex:H2=1 molecule of hydrozen