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!

Homework Help: 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


    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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted