atom - the smallest component of an element having the chemical properties of the element, proton - positively charged particle found in the nucleus of an atom, neutron - neutral particle found in the nucleus of an atom, electron - negatively charged particle found in the electron cloud outside of the nucleus, ion - a particle like an atom that has lost or gained electrons, isotope - any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons in the nucleus, or different atomic weights., periodic table - table of arranged elements,

Atoms

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