Unpaired Electrons  [ENDORSED]

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Kellina Tran 2I
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Unpaired Electrons

Postby Kellina Tran 2I » Thu Oct 26, 2017 12:36 am

How do I know how many unpaired electrons an element atom has based on its electron configuration?

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Re: Unpaired Electrons  [ENDORSED]

Postby Chem_Mod » Thu Oct 26, 2017 8:41 am

First begin by writing out its electron configuration based on the Aufbau principle and the exceptions for Cr and Cu that we discussed in lecture. Then take a look at its subshells that are not fully filled. Consider Hund's rule, that a subshell must be completely singly filled before the electrons can be paired, and count how many unpaired electrons are in your s, p, or d orbitals as the case may be.

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