26.2: Chlorine is an unusual element in that it has two abundant stable isotopes, Cl-35 and Cl-37, constituting, respectively, about 76% and 24% of natural chlorine. The masses of these isotopes in unified atomic mass units are, to three significant figures, equal to their mass numbers 35 and 37. A mass spectrometer like that described in Example 26.1 and Fig. 26.7 is used with singly ionized chlorine atoms. The spectrometer has a 3.50-kV accelerating potential and a 163-mT magnetic field. How far apart will Cl-35 and Cl-37 ions be when they reach the detector? Wolfson, Richard. Essential University Physics, Volume 2 (p. 511). Pearson Education. Kindle Edition.