BRAINCAKEQuark Composition of Protons and Neutrons
A proton is made of two up quarks and one down quark: uud.
charge = (+2⁄3) + (+2⁄3) + (−1⁄3) = +1e
A neutron is made of one up quark and two down quarks: udd.
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Key terms in this lesson
- strong nuclear force
- The fundamental force that acts between quarks and holds protons and neutrons together in the nucleus, with a very short range.
More in Fundamental Particles
- Antiparticles
- Hadrons and Leptons
- The Strong Nuclear Force
- Quarks and Antiquarks
- Baryons and Mesons
- Beta-Minus Decay and Quarks
- Beta-Plus Decay and Quarks
- The Weak Interaction
All 11 lessons in Fundamental Particles · All OCR A-level Physics topics