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Chemistry · May / June 2018 · Paper 12 · Question 5

5070Atomic structure and the Periodic Table

The atomic number of cerium, Ce, is 58. A Ce4+ ion has 140 nucleons in its nucleus. How many protons, neutrons, and electrons are there in one Ce4+ ion?

  1. A58 protons, 82 neutrons, 54 electrons
  2. B58 protons, 82 neutrons, 62 electrons
  3. C82 protons, 58 neutrons, 54 electrons
  4. D82 protons, 58 neutrons, 62 electrons

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Correct answer: A. 58 protons, 82 neutrons, 54 electrons

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