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cadmium ground state electron configuration

Posted: Sun Nov 04, 2018 7:39 pm
by 405161024
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.

Re: cadmium ground state electron configuration

Posted: Sun Nov 04, 2018 7:46 pm
by LorenzoDuvergne3I
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!

Re: cadmium ground state electron configuration

Posted: Mon Nov 05, 2018 1:38 pm
by Laura Gong 3H
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.