purity | |||
100% | UP QUARK | Usual Particle; Quite Unremarkable And Readily Kept. |
Angela Brett ('Up' is one of the six types of QUARK... along with DOWN QUARK, STRANGE QUARK, CHARM QUARK, TOP QUARK and BOTTOM QUARK. UP QUARKs and DOWN QUARKs make up neutrons and protons so they're very common. See PROTON (3)) Science:Physics:Particles |