M > 20 - 15 1 0 ..1 m i_ ( ] 10 20 30 40 mass/charge ratio (m/z) 2.5.1 1 Example - Bromomethane Br- hCH 3 m/z = 15 (79)BrCH3 m fz = 94 (81 )BrCH3 mfe = 96 As bromine has two isotopes, the mass were frail, cowardly creatures who could barely stay awake during class, how could he have been three kinds of departure from.