Exam-style question
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What is the charge of an up antiquark?.
- A.+2/3
- B.-2/3
- C.0
- D.-1
Model answer
What a good answer should say
- The charge of an up antiquark is -2/3.
Explanation
Why this works
The up antiquark has a charge of -2/3, which is the opposite of the up quark's charge of +2/3, consistent with the properties of particle-antiparticle pairs.
Common mistake
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