AQA Jun 2010 Paper 1 Q7

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section b answer all questions in the spaces provided do not write outside the box iodine and graphite are both solids when iodine is heated gently a purple vapour is seen graphite will not melt until the temperature reaches k graphite conducts electricity but iodine is a very poor conductor of electricity a state the type of crystal structure for each of iodine and graphite marks b describe the structure of and bonding in graphite and explain why the melting point of graphite is very high marks extra space wmp jun chem do not write outside the box c explain why iodine vaporises when heated gently marks d state why iodine is a very poor conductor of electricity mark turn over for the next question turn over wmp jun chem a define the term mass number of an atom do not write outside the box the mass number of an isotope of nitrogen is deduce the number of each of the fundamental particles in an atom of n marks extra space wmp jun chem

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