In all , the model distinguishes 24 different fermions : six quarks : the up quark , down quark , strange quark , charmed quark , bottom quark , and top quark ; and six leptons ( electron , electron neutrino , muon , muon neutrino , tau particle , tau neutrino ) , each with a corresponding antiparticle .
The electron , muon , and tau leptons all have charge of -1 , and their anti-particles ( anti-electron or `` positron '' , anti-muon , anti-tau ) have charge +1 .