the major difference Between Atoms and Ions is that Atoms contain protons, electrons, and neutrons with some other sub atomic particles. they are neutral particles while ions contain a single atom, some of the ions also polyatomic ions. ions are either negatively or positively charged particles.
|It is the smallest particle of an element.||It is the smallest unit of an ionic compound.|
|It can or cannot exist independently and can take part in a chemical reaction.||It cannot exist independently and is surrounded by oppositely charged ions.|
|It is electrically neutral.||It has a net charge (either negative or positive) on it.|