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100% DOWN QUARKDuo On Whole Neutron Quiets Up's 'Affirmative' Reaction Kick Angela Brett ('Down' is one of the six types of quark... along with UP QUARK, STRANGE QUARK, CHARM QUARK, TOP QUARK and BOTTOM QUARK. Neutrons are each composed of two down quarks with charge -1/3 each, and one up quark with charge +2/3, giving them an overall charge of zero.)
Science:Physics:Particles
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