Question

what do u mean by quark?

Answer 1

A quark is an elementary particle with an electric charge. When quarks combine, they form another type of particle called a "hadron." If you want to learn more, take up particle physics. ... The most stable of these quark combinations, or hadrons, are protons and neutrons — the basic building blocks of atoms.

Answer 2

Answer:

any of a number of subatomic particles carrying a fractional electric charge, postulated as building blocks of the hadrons. Quarks have not been directly observed but theoretical predictions based on their existence have been confirmed experimentally.