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Physics (AS & A Level) · Oct / Nov 2018 · Paper 11 · Question 39

9702Atoms, nuclei and radiation

A nucleus emits a β– particle. What is the change to the proton number and to the nucleon number of the nucleus?

  1. Aproton number –1, nucleon number +1
  2. Bproton number 0, nucleon number –1
  3. Cproton number +1, nucleon number –1
  4. Dproton number +1, nucleon number 0

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Correct answer: D. proton number +1, nucleon number 0

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