| Protons are positively charged particles found within atomic nuclei. Protons were discovered by Ernest Rutherford in experiments conducted between the years 1911 and 1919. Although a proton has a mass 1837 times greater than an electron, it is nearly identical in mass to a neutron. Protons are constituents of the nuclei of all elements and an elements atomic number is dependent upon how many protons an element has.
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| The proton has a mass of 938.3 MeV (1.6726 x 10-27 kg).
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| A proton is classified as a baryon, and consists of two up quarks and one down quark.
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| The proper symbol to use when representing a proton; |
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See Also