A proton 'down' quark has a value of:
Correct answer: A. -1/3
- A. -1/3
- B. -2/3
- C. 2/3
- D. None of these
Explanation
The two types of particles that you need to know are hadrons and leptons. Particles that are affected by the strong nuclear force are called hadrons, like protons and neutrons. Leptons are particles that are affected by the weak nuclear force, like electrons. Hadrons are made of quarks that can have one of 6 flavors. Protons consist of two flavors, up and down. The quark composition is such that the overall charge of the particle is maintained. In the case of a proton, that overall charge is +1. Based on the given table, the value of a down quark is -1/3.
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