Atoms - contains electrons, smallest amount of matter.
Elements: contains electrons, a form of matter, composed of a single type of atom, defined by number of protons.
Atoms are the smallest unit of matter. They are made of an inner core consisting of protons and neutrons and an outside shell where electrons revolve.
Elements are pure substances composed of a single type of atom. They are defined by an atomic number which is the number of protons in the nucleus of their atoms.
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