Proton | Definition, Mass, Charge, & Facts | Britannica
https://www.britannica.com/science/proton-subatomic-particle
WEBMar 9, 2024 · proton, one of the three basic subatomic particles —along with neutrons and electrons —that make up atoms , the basic building blocks of all matter and chemistry . It is the positively charged particle that, together with the electrically neutral particles called neutrons, make up the nucleus of an atom .
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