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Physics (AS & A Level) · Oct / Nov 2017 · Paper 13 · Question 40

9702Fundamental particles

Which combination of up (u) and down (d) quarks forms a proton?

  1. Au u u
  2. Bu u d
  3. Cu d d
  4. Dd d d

As printed in the paper

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Correct answer: B. u u d

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