Mass Spectra

Question 1

A mass spectrometer was used to analyse a sample of bromine, Br2, with only the
79Br and 81Br isotopes present.
Explain why a very small peak occurs at m/z = 80.

Answer 1

 Br2 has a mass of 160 (and 158 and 162) (1)

 Br2(2+) has a m/z = 80 (1)