AQA Jun 2010 Paper 1 Q8

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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 b define the term relative atomic mass do not write outside the box an organic fertiliser was analysed using a mass spectrometer the spectrum showed that the nitrogen in the fertiliser was made up of n and n calculate the relative atomic mass of the nitrogen found in this organic fertiliser give your answer to two decimal places marks extra space c in a mass spectrometer under the same conditions n and n ions follow different paths state the property of these ions that causes them to follow different paths state one change in the operation of the mass spectrometer that will change the path of an ion marks question continues on the next page turn over wmp jun chem do not write outside the box d organic fertilisers contain a higher proportion of n atoms than are found in synthetic fertilisers state and explain whether or not you would expect the chemical reactions of the nitrogen compounds in the synthetic fertiliser to be different from those in the organic fertiliser assume that the nitrogen compounds in each fertiliser are the same marks end of questions copyright aqa and its licensors all rights reserved wmp jun chem

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