Question: A representation of the photographic detector plate of a Bainbridge mass spectrometer is shown in Fig. 8.17. Three lines are visible where ions of a single element have struck the plate. S3 is the location of the exit slit of the Wien velocity filter. The distances of the lines from S3 are: d1 = 12.0 cm, d2 = 12.5 cm, d3 = 13.0 cm. The line at d1 is the darkest line. What is your best guess for the identity of the element? Explain your reasoning.
Fig. - Representation of a developed photographic plate from a Bainbridge mass spectrometer