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CAIE A-Level Chemistry 22.2.1 Analysing Mass Spectra

Practise reading m/e values and relative abundances to identify isotopic ions and explain peak patterns.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • identify an ion by matching its mass and charge to the observed m/e, including multiply charged ions
  • relate peak-height ratios to natural isotope abundances rather than to different ion stability alone
  • use linked isotope peaks and fragment evidence together when suggesting a molecular structure

22.2.1—Analyse mass spectra question 1

[Maximum number: 1]

Copper is used in electrical equipment. It has a melting point of 1085∘C1085^{\circ} \mathrm{C}.

The mass spectrum of a sample of pure copper is shown in Fig. 1.1.

Fig. 1.1

Fig. 1.1

Identify the ion with an abundance of 23 % in the sample.

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