1. Not finding help here? Sign up for a free 30min 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!

Lowest energy term symbol for nitrogen

  1. Oct 19, 2011 #1
    1. The problem statement, all variables and given/known data
    Lowest energy term symbols for Nitrogen

    2. Relevant equations

    L=l1+l2, l1+l2-1, l1-l2

    S=s1+s2, s1-s2

    J=S+L, S-L

    3. The attempt at a solution


    So I think I'm doing this right up until finding the J value.
    So the configuration of nitrogen is 1s22s22p3, so were working with 3 electrons

    for the first 2e-

    L`=1+1=2, 1+1-1=1, 1-1=0

    coupling those to the 3rd electron

    L=2+1=3, 2+1-1=2,2-1=1 so L=3,2,1

    L=1+1=2,1+1-1=1, 1-1=0 so L=2,1,0

    L=1-0=1 so L=1

    so therefore there is 1F, 2D,3P,1S

    S for the first 2e-

    S=1/2 + 1/2=1

    S=1/2 - 1/2=0

    coupling to 3rd e-

    S=1+1/2=3/2

    S=0+1/2=1/2

    Now for the J value I'm getting confused on which L and S values to use

    ex: since there is 2 D terms how do I know which to use????????:

    J= L+S, L-S

    J=2+3/2=7/2 so that TS: 4D7/2

    J=2-3/2= 1/2 so that TS: 4D1/2

    J=2+1/2=5/2 so that TS: 2D5/2

    J=2-1/2= 3/2 so that TS: 2D3/2

    I feel like I'm missing something pretty elementary here and my book doesn't really show many examples for finding the term symbol for more than 1 electron that include the J values.
    It said to list all possible ones, but it might mean just the lowest one (since it says that too) which means I guess I would use Hund's rule.
    Despite that fact I would still like to know which how to use the L and S values to find the possible term symbols
    Thank you for the help!
     
    Last edited: Oct 19, 2011
  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?



Similar Discussions: Lowest energy term symbol for nitrogen
  1. Activation energy (Replies: 0)

  2. Resonance Energy (Replies: 0)

Loading...