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Through mass spectrometry, we can define 4 different isotopes of the BrCl molecule:⁸¹Br³⁷Cl, ⁸¹Br³⁵Cl, ⁷⁹Br³⁷Cl, ⁷⁹Br³⁵ClMasses of the different individual isotopes:³⁷Cl=36.966³⁵Cl=34.968⁸¹Br=80.916⁷⁹Br=78.918Masses of 4 different isotopes of the BrCl molecule:⁸¹Br³⁷Cl=80.916+36.966=117.882⁸¹Br³⁵Cl=80.916+34.968=115.884⁷⁹Br³⁷Cl=78.918+36.966=115.884⁷⁹Br³⁵Cl=78.918+34.968=113.886...