Question

what is up cvark and doun kvark?​

Answer 1

A quark (/kwɔːrk, kwɑːrk/) is a type of elementary particle and a fundamental constituent of matter. Quarks combine to form composite particles called hadrons, the most stable of which are protons and neutrons, the components of atomic nuclei. ... Up and down quarks have the lowest masses of all quarks.

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Answer 2

The down quark or d quark(symbol: d)is the second-lightest of all quarks, a type of elementary particles, and a major constituent of matter. Together with the up quark, it forms the neutrons (one up quark and two down quarks) of atomic nuclei

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