up quark

created by whort
(thing) by whort (6.6 y) (print)   (I like it!) Sat Nov 13 1999 at 10:01:19
The upper quark in the first generation of elementary particles, the up quark has a charge of 2/3. One of the building blocks of normal matter, a proton is composed of two up quarks and one down quark, while a neutron is one up quark and two down.
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