1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Absoprtion specrum, identifying the 1 electon atom

  1. Apr 6, 2013 #1
    1. The problem statement, all variables and given/known data
    The energies of some transitions observed in the absorption spectrum of an unknown one electron ion ( eg He+) are listed. Given that these transitions originate from the lowest energy level suggest an identification of the unknown ion


    2. Relevant equations

    ok, i am using Delta E = Rh (1/nf^2 - 1/ni^2) where f stands for final and i for initial

    3. The attempt at a solution

    the problem is that I am not getting numbers close to integer values. Im not sure if the q even requires a numerical answer, as 3 ionisation energies must mean that the element is Be. I really don't know where to start. pls help
    Last edited: Apr 6, 2013
  2. jcsd
  3. Apr 6, 2013 #2


    User Avatar

    Staff: Mentor

    These are "some transitions", so it is not a complete list of three ionization energies.

    Obvious line of attack is to try to find Z from the data given.
  4. Apr 6, 2013 #3

    how would you find z? sorry, I have no clue
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Threads - Absoprtion specrum identifying Date
Stoichiometry: Identify the metal and formula of it Aug 21, 2016
Identify the 2 metal cations through reactions Jul 2, 2016