1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Mass Spectrometer Formula question

  1. Feb 24, 2012 #1
    1. The problem statement, all variables and given/known data
    In the velocity selector region of a mass spectrometer, an electric field of
    2.34 × 10^3 N/C is perpendicular to a magnetic field, B = 1.56 × 10^-2 T.
    Abeam of positive ions (q = +e) then enters a region with the same B field,
    but no E field. If the ions are detected at a radius of curvature of r = 1.20m,
    what is the mass of the unknown ion?


    2. Relevant equations
    m=(qBB'r)/E


    3. The attempt at a solution
    Got the answer m=1.99x10^-26, or 12u

    The question asks for the mass of the ion, it is my understanding that the formula I used solves for the mass of the atom, not an ion. I'm not sure if the question should be asking for the mass of the unknown atom or I am not using the correct formula, in which case how do I solve the mass of the ion?


    Thanks
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted



Similar Discussions: Mass Spectrometer Formula question
Loading...