Quelpr
3 marksStructure and Bonding

CSEC Chemistry · May/June 2006 · Paper 2 · Question 2(c)(ii)

The melting points of chlorine, sodium chloride and magnesium oxide are -101°C, 800°C and 2800°C respectively.

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 chloride.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 2(a)(i)What differences, if any, are expected between the chemical reactions of chlorine 35 and chlorine 37? Explain your answer.[2 marks]
  2. 2(a)(ii)Determine the number of electrons, protons and neutrons in the anion formed from the chlorine 37 atom.[3 marks]
  3. 2(b)(i)Explain the term 'ionic crystal'.[2 marks]
  4. 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]
  5. 2(c)(i)Explain why the melting point of sodium chloride is much higher than that of chlorine.[3 marks]

More practice: the rest of this paper · more Structure and Bonding questions · all CSEC Chemistry past papers