text: This technique is performed in tandem for protein sequencing.
full_question: This technique is performed in tandem for protein sequencing. The devices used in this technique use analyzers like magnetic sectors and ion traps to separate particles. In the first step of this technique, analytes undergo ionization processes like ESI and MALDI. Unlike those "soft" ionization methods, "hard" methods bombard the samples with electrons to cause fragmentation in this technique. In this technique, compounds containing chlorine and bromine show sizeable M+2 ["M plus 2"] isotope peaks. This technique measures the ratio of its namesake property to charge. For 10 points, name this form of spectrometry which separates fragments based on heaviness.
first_sentence: This technique is performed in tandem for protein sequencing.
raw_answer: mass spectrometry [or mass spectroscopy; or MS]