AQA Jun 2016 Paper 1 Q1

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section a answer all questions in the spaces provided do not write outside the box mass spectrometry is a technique that can be used to separate isotopes of an element in order to determine relative atomic mass a give the meaning of the term relative atomic mass marks b in a spectrometer isotopes are converted into ions that are separated by deflection and are then detected b i ions are deflected using mark tick one box an electric field an electron gun a magnetic field a potential difference b ii describe how the ions are detected marks wmp jun chem do not write outside the box c table gives the relative abundance of each isotope in the mass spectrum of a sample of silicon recorded using a high resolution mass spectrometer table m z relative abundance use the data to calculate a value for the relative atomic mass of this sample of silicon give your answer to decimal places marks d a second mass spectrum was recorded for the same sample of silicon the energy of the electrons from the electron gun was higher for this second spectrum state and explain one similarity and one difference between the two spectra marks similarity explanation difference explanation turn over wmp jun chem

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