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How to sign: hypothetical truly fundamental particle in mesons and baryons; there are supposed to be six flavors of quarks (and their antiquarks), which come in pairs; each has an electric charge of +2/3 or -1/3
Categories: elementary particle, fundamental particle, subatomic particle
Within this category: bottom quark, charm quark, down quark, strange quark, top quark, up quark
