A proton 'up' quark has a charge of:
Correct answer: A. +2/3
- A. +2/3
- B. -1/3
- C. -2/3
- D. +1/3
Explanation
The two types of sub-atomic 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. Two flavors found in a proton are up and down. The quark composition is such that the overall charge of the particle is maintained. In the case of a proton, that charge is +1. Proton: u u d The charge of 'u' is +2 / 3.
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