Which electron disappears for ion configurations

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Daniel_Frees_1L
Posts: 40
Joined: Fri Sep 28, 2018 12:18 am

Which electron disappears for ion configurations

Postby Daniel_Frees_1L » Sun Nov 04, 2018 6:38 pm

I know that the electron to take away when making an ion configuration (ie: Cr+) is typically the outermost electron, but are there any exceptions to this rule?

Andre_Galenchik_2L
Posts: 69
Joined: Fri Sep 28, 2018 12:23 am

Re: Which electron disappears for ion configurations

Postby Andre_Galenchik_2L » Sun Nov 04, 2018 6:40 pm

I do not believe so. Just remember to take away the 4s electrons before the 3d electrons.

Grace Kim 1J
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am
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Re: Which electron disappears for ion configurations

Postby Grace Kim 1J » Tue Nov 06, 2018 1:33 pm

Here is an example:
Ga^(3+)

The electron configuration for just Ga would be [Ar]4s^2 3d^10 4p^1.
Since there is a 3+ attached to Ga (meaning you have to take away 3 electrons), you would get rid of 4p^1 first since it is the highest. Then you would take out 4s^2.

Therefore your final answer for Ga^(3+) would be [Ar] 3d^10.


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