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Electron Configuration

  1. Oct 26, 2016 #1
    1. The problem statement, all variables and given/known data
    Write the electron configuration for Cd 2+.

    2. Relevant equations


    3. The attempt at a solution
    [Kr] 4d10

    Whenever we remove electrons do we always remove it from the s orbital in that period. So for cadium ion we remove 5s2 correct? But let's say it's Mn 2+ would we remove the electrons from 4s?
     
  2. jcsd
  3. Oct 26, 2016 #2

    Borek

    User Avatar

    Staff: Mentor

    In general we remove electrons in exactly opposite order we put them on the atom - do you know the Aufbau principle?

    There are several exclusions though.
     
  4. Oct 26, 2016 #3
    Okay I see, yes I know the Aufbau principle.
     
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