(Solved): 7. The mass spectrum of a sample of krypton taken from a meteorite is shown below. (a) Use this sp ...

7. The mass spectrum of a sample of krypton taken from a meteorite is shown below. (a) Use this spectrum to calculate the relative atomic mass \( \left(A_{r}\right) \) of this sample of krypton. Give your answer to one decimal place. (b) (i) State how krypton is ionised in the mass spectrometer. (ii)Write an equation, including state symbols, to show the reaction that occurs in the ionisation chamber. (c) The relative atomic mass of krypton found in the Earth's atmosphere is different to that of that found in the meteorite. Give one explanation for this difference. (1 mark) (d) Why would only one peak be observed in a mass spectrum produced from a sample of a meteorite containing the species \( [\mathrm{Kr}-84]^{2+} \) and \( [\mathrm{Ca}-42]^{+} \) (1 mark) TOTAL MARKS \( =9 \)