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Chemistry · Oct / Nov 2018 · Paper 12 · Question 7

5070Ion and ionic bonds

One atom of element X and two atoms of element Y react to form an ionic compound. Element X forms a positive ion. Which elements could X and Y be?

  1. Acalcium / chlorine
  2. Bcalcium / oxygen
  3. Csodium / chlorine
  4. Dsodium / oxygen

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Correct answer: A. calcium / chlorine

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