2.7—Predict mass spectra

Be able to predict mass spectra, including relative peak heights, for diatomic molecules, including chlorine, given the isotopic abundances.

Use —predict mass spectra to connect the rule to the data and decision in the question.

This matters because —predict mass spectra determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —predict mass spectra to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —Predict mass spectra is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.