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The proton is a positively charged (+) subatomic particle located in the atomic nucleus. It plays a central role in both atomic physics and high-energy particle physics. Within the framework of modern theoretical physics, the structure of the proton, its internal dynamics, and experimental measurement methods remain key areas of ongoing research. Definition and General Properties The proton is a baryon with a positive electric charge of +1e, a spin of ½, and a mass of approximately 938.272 MeV/c