Proton
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A proton is a stable subatomic particle, symbol p, H+, or 1H+ with a positive electric charge of +1 e. Its mass is slightly less than the mass of a neutron and approximately 1836 times the mass of an
Ernest Rutherford at the first Solvay Conference, 1911
Quark
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A quark is a type of elementary particle and a fundamental constituent of matter. Quarks combine to form composite particles called hadrons, the most stable of which are protons and neutrons, the comp
Proton
…strong force, mediated by gluons. A modern perspective has a proton composed of the valence quarks (up, up, down), the gluons, and transitory pairs of sea quarks. Protons have a positive charge distribution, which decays approximately exponentially, with a root mean square charge radius of about 0.8 fm. Protons…
Murray Gell-Mann (2007)
George Zweig (2015)