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!

Ionization energy

  1. Dec 7, 2004 #1
    Can someone please help me understand the following question?

    The ionization energy of the outermost electron in Li is 5.390 eV. What is the effective charge seen by the outermost electron? (Li has 2 energy levels)
  2. jcsd
  3. Dec 7, 2004 #2


    User Avatar
    Science Advisor
    Homework Helper

    Think as Litium atom as a hydronenoid ion with one lousy electron orbiting the positively charged core (i don't call it nucleus,since it includes the other 2 electrons of Litium) of charge +Z_eff times e.
    Plug it in Balmer formula (the one which assumes infinite mass nucleus and that,for the reason of simplicity) for n_1=2 and n_2=infinity and you'll get your result by a simple division.I would advise using Heaviside-Lorentz units.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Ionization energy
  1. Ionization energy (Replies: 0)

  2. Ionization Energy? (Replies: 5)

  3. Ionization Energies (Replies: 4)