## Electron Configurations of ions

McKenna_4A
Posts: 115
Joined: Sat Aug 24, 2019 12:18 am

### Electron Configurations of ions

If we are given a cation ion in the d-block, should we remove electrons from the d orbital first or the outermost s-orbital?

Jordan Young 2J
Posts: 102
Joined: Thu Jul 25, 2019 12:17 am
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### Re: Electron Configurations of ions

You would remove from the 4s state first and then from the 3d because the 4s becomes higher in energy once the 3d orbital starts being filled.

KDang_1D
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### Re: Electron Configurations of ions

Yes, in lecture, Prof. Lavelle gave an example with In ions:

$In: [Kr]4d^{10}5s^{2}5p^{1}$
$In^{+}: [Kr]4d^{10}5s^{2}$
$In^{3+}: [Kr]4d^{10}$

Posts: 100
Joined: Wed Sep 18, 2019 12:19 am

### Re: Electron Configurations of ions

You would start in the outermost shell as well because it is easier to remove electrons from there rather than spend the energy to remove it from an orbital closer to the nucleus.

805097738
Posts: 180
Joined: Wed Sep 18, 2019 12:20 am

### Re: Electron Configurations of ions

the electron would be removed from the highest energy state.