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2 marksAtomic Structure

CSEC Chemistry · May/June 2006 · Paper 2 · Question 2(a)(i)

Chlorine has two isotopic forms with mass numbers 35 and 37. Chlorine has an atomic number of 17.

What differences, if any, are expected between the chemical reactions of chlorine 35 and chlorine 37? Explain your answer.

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Other parts of this question

  1. 2(a)(ii)Determine the number of electrons, protons and neutrons in the anion formed from the chlorine 37 atom.[3 marks]
  2. 2(b)(i)Explain the term 'ionic crystal'.[2 marks]
  3. 2(b)(ii)Using the symbols, filled circle for sodium ions and empty circle for chloride ions, fill in on the diagram in Figure 3, the positions occupied by these ions…[3 marks]
  4. 2(c)(i)Explain why the melting point of sodium chloride is much higher than that of chlorine.[3 marks]
  5. 2(c)(ii)The crystal structures of magnesium oxide and sodium chloride are similar. Suggest why the melting point of magnesium oxide is much higher than that of sodium…[3 marks]

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