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Physics (AS & A Level) · Oct / Nov 2018 · Paper 11 · Question 40

9702Fundamental particles

How many up quarks and how many down quarks are in a nucleus of the nuclide $^{37}_{17}\text{Cl}$?

  1. Aup quarks 51, down quarks 60
  2. Bup quarks 54, down quarks 57
  3. Cup quarks 57, down quarks 54
  4. Dup quarks 60, down quarks 51

As printed in the paper

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Correct answer: B. up quarks 54, down quarks 57

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