A lepton is an elementary, spin-1⁄2 pairticle that daes nae unnergo strang interactions, but is subject tae the Pauli exclusion principle. The best kent o aw leptons is the electron, which govrens nearly aw o chemistry as it is foond in atoms an is directly tied tae aw chemical properties. Twa main classes o leptons exist: charged leptons (forby kent as the electron-lik leptons), an neutral leptons (better kent as neutrinos). Charged leptons can combine wi ither pairticles tae furm various composite pairticles such as atoms an positronium, while neutrinos rarely interact wi onything, an are consequently rarely observed.
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