TOP

Top (t): The heaviest quark, with a charge of +2/3

Mass: ~173 GeV/c² (heaviest known elementary particle)
Lifetime: ~5×10⁻²⁵ s (decays faster than it hadronizes)
Decays via: Weak interaction to bottom quark (t → b + W⁺)
Significance: Studied in collider physics (LHC, Tevatron)