AQA Jan 2012 Paper 1 Q7

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the mass spectrum of a sample of krypton taken from a meteorite is shown below do not write outside the box relative abundance m z a use this spectrum to calculate the relative atomic mass of this sample of krypton give your answer to one decimal place explain why the value you have calculated is slightly different from the relative atomic mass given in the periodic table marks extra space wmp jan chem b state how krypton is ionised in the mass spectrometer do not write outside the box write an equation including state symbols to show the reaction that occurs when the first ionisation energy of kr is measured sometimes the mass spectrum of kr has a very small peak with an m z value of explain the occurrence of this peak marks extra space end of questions wmp jan chem

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