Quark
A quark 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. All commonly... Wikipedia
Discovery date: 1964
Baryon number: 1/3
Composition: elementary particle
Discovered: SLAC (c. 1968)
Electric charge: +2/3 e, −1/3 e
Generation: 1st, 2nd, 3rd
Interactions: strong, weak, electromagnetic, gravitation