ONUP
- Sort by: Highest Rated
The up quark or u quark (symbol: u) is the lightest of all quarks, a type of elementary particle, and a major constituent of matter. It, along with the down quark, forms the neutrons (one up quark, two down quarks) and protons (two up quarks, one down quark) of atomic nuclei.
It seems we can’t find what you’re looking for. Perhaps searching can help.