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Chemistry · Oct / Nov 2021 · Paper 12 · Question 8

5070Atomic structure and the Periodic Table

The table shows data for some particles. | particle | proton number | nucleon number | number of protons | number of neutrons | number of electrons | |---|---|---|---|---|---| | sodium ion | 11 | 23 | 11 | W | 10 | | fluoride ion | 9 | 19 | 9 | 10 | X | | magnesium ion | 12 | 24 | Y | 12 | 10 | What are the values of W, X and Y?

  1. AW 10, X 10, Y 12
  2. BW 11, X 12, Y 10
  3. CW 12, X 10, Y 12
  4. DW 12, X 10, Y 10

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Correct answer: C. W 12, X 10, Y 12

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