cadmium ground state electron configuration

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405161024
Posts: 36
Joined: Fri Sep 28, 2018 12:25 am

cadmium ground state electron configuration

Postby 405161024 » Sun Nov 04, 2018 7:39 pm

I saw a question that asked what element with a 2+ charge would have this ground state electron configuration:
[Ar]4d10
and the answer is cadmium, but i don't understand why.

LorenzoDuvergne3I
Posts: 60
Joined: Fri Sep 28, 2018 12:25 am

Re: cadmium ground state electron configuration

Postby LorenzoDuvergne3I » Sun Nov 04, 2018 7:46 pm

When you remove electrons from an atom, the first ones that go are in the valence shell. In the case of Cadmium that would be the 5s electrons rather than the 4d electrons. Hope this helps!

Laura Gong 3H
Posts: 89
Joined: Fri Sep 28, 2018 12:26 am
Been upvoted: 1 time

Re: cadmium ground state electron configuration

Postby Laura Gong 3H » Mon Nov 05, 2018 1:38 pm

The neutral electron configuration of Cd is [Kr]4d105s2.
When the question asks you for the +2 cation of the element, you just have to remove the 2 valence electrons which will get you: [Kr]4d10.


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