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Lessons for this topic haven’t been written yet. The objectives below show exactly what the syllabus expects, so you can plan with them in the meantime.
What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.
Analyse mass spectra in terms of m/e values and isotopic abundances.
Knowledge of the working of the mass spectrometer is not required.
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Calculate the relative atomic mass of an element from the relative abundances of its isotopes, or from its mass spectrum.
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Deduce the molecular mass of an organic molecule from the molecular ion peak in a mass spectrum.
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Suggest the identity of molecules formed by simple fragmentation in a given mass spectrum.
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Deduce the number of carbon atoms, n, in a compound using the [M + 1]⁺ peak and the formula n = (100 × abundance of [M + 1]⁺ ion) / (1.1 × abundance of M⁺ ion).
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Deduce the presence of bromine and chlorine atoms in a compound using the [M + 2]⁺ peak.
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