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Physics · Oct / Nov 2018 · Paper 12 · Question 40

5054The nucleus

Which statement about two different isotopes of the same element is correct?

  1. ABoth isotopes have the same number of electrons in a nucleus.
  2. BBoth isotopes have the same number of protons in a nucleus.
  3. CBoth isotopes have the same number of neutrons in a nucleus.
  4. DBoth isotopes have the same number of nucleons in a nucleus.

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Correct answer: B. Both isotopes have the same number of protons in a nucleus.

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