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1. fermions

   • a subatomic particle, such as a nucleon, which has half-integral spin and follows the statistical description given by Fermi and Dirac
   • leptons
     • electron, muon, tau, electron neutrino, muon neutrino, tau neutrino
   • quarks
     • up, down, top, bottom, strange, charm
     • hadrons
       • sub-atomic particles of a type including the baryons and mesons, which can take part in the strong interaction (anything made of quarks)
       • baryons
         • a sub-atomic partical such as a nucleon or hyporon that has a mass equal to a proton (3 quarks)
         • nucleons
           • something you find in a nucleus= proton or nuetron