KnowraUp quarkLinked fromLinked fromThe 6 pages that link to Up quark, each with the reason it gives.All 6Broader topic 2Related 2Compared with 2ProtonBroader topic: Two up quarks contribute to the proton’s composition and its net positive charge.PionRelated: Up quarks and antiquarks appear in the pion’s charged and neutral states.Charm quarkCompared with: It shares charm’s electric charge but is far lighter and has a different flavor.IsospinBroader topic: Replacing a down quark with an up quark changes charge while preserving the strong-interaction pattern.Top quarkCompared with: It shares the top quark's electric charge but is far lighter and stable inside ordinary matter.Down quarkRelated: Together, two up quarks and one down quark form a proton.