Electron configuration for ions  [ENDORSED]

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Angela_Kim_1N
Posts: 21
Joined: Fri Jul 22, 2016 3:00 am

Electron configuration for ions

Postby Angela_Kim_1N » Thu Oct 20, 2016 10:29 pm

If we are writing the electron configuration of an ion such as Cl-, then is it [Ar] or [Ne] 3s2 3p6?

Karan Ishii 3E
Posts: 21
Joined: Wed Sep 21, 2016 3:00 pm

Re: Electron configuration for ions  [ENDORSED]

Postby Karan Ishii 3E » Thu Oct 20, 2016 11:00 pm

Both are technically correct but just go with [Ar] to save you and anybody else some time.

Vincent Tse 2B
Posts: 30
Joined: Fri Jul 22, 2016 3:00 am
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Re: Electron configuration for ions

Postby Vincent Tse 2B » Thu Oct 20, 2016 11:33 pm

I think the important thing to remember is that the electron configurations for ions require your attention on the addition or subtraction of electrons.

For example, if you were to write the configuration for the anion Cl^-, it would be [Ar] and not its neutral config. [Ne] 3s^2 3p^5 since the ion actually has one more electron than the neutral atom.


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