1. An ion source in a particular mass spectrometer produces deuterons (a deuteron has twice the mass of a proton, but the same charge). Each deuteron is accelerated from rest through a potential difference of 2000 V after which it enters a 0.600 T magnetic field. Find the radius of the circular path. 2. A mass spectrometer uses a potential difference of 2.00 kV to accelerate a singly charged ion to the proper speed. A 0.400 T magnetic field bends the ion into a circular path of radius 0.226 millimeter. What is the mass of the ion?