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27. Natural Reality / B. Modern Physics / 4. Standard Model / e. Protons

[positive components of atomic nuclei]

4 ideas
Most of the mass of a proton is the energy in virtual particles (rather than the quarks) [Krauss]
Neutrons are slightly heavier than protons, and decay into them by emitting an electron [New Sci.]
Top, bottom, charm and strange quarks quickly decay into up and down [New Sci.]
Quarks rush wildly around in protons, restrained by the gluons [Hesketh]