Discussion
A compound containing one bromine atom shows M and M plus 2 peaks in a ratio of about
Answer: C
Correct answer: 1 to 1
Bromine’s two isotopes, bromine-79 and bromine-81, are almost equally abundant, so a single bromine gives M and M plus 2 peaks of nearly equal height. The contrast with chlorine’s 3 to 1 makes the two immediately distinguishable, and the presence of both elements gives a characteristic multi-peak cluster whose pattern reveals how many of each atom are present.
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