The standard model, quarks and leptons, antimatter, particle interactions and the use of particle accelerators.
Classifying particles
Hadrons (feel the strong force): baryons (3 quarks, e.g. proton = uud, neutron = udd) and mesons (a quark + antiquark).
Leptons (fundamental, don't feel the strong force): electron, muon, and neutrinos.
Quarks: up, down, strange (and others), with fractional charges (u = +⅔, d = −⅓).
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