Exceptions to electron configuration

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FrankieClarke2C
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Joined: Fri Sep 28, 2018 12:28 am

Exceptions to electron configuration

Postby FrankieClarke2C » Sun Oct 28, 2018 4:13 pm

How are the exceptions to electron configuration determined? It explains in the textbook why they set up the configuration in certain elements this way but what differentiates copper and another metal?

Casandra
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am

Re: Exceptions to electron configuration

Postby Casandra » Sun Oct 28, 2018 4:44 pm

FrankieClarke4B wrote:How are the exceptions to electron configuration determined? It explains in the textbook why they set up the configuration in certain elements this way but what differentiates copper and another metal?


The exceptions to electron configuration are the groups of 6( chromium) and 11(copper). These two are exceptions because typically one would write the configuration of Copper as [Ar]3d^9 4s^2, however, it is more stable to have 10 electrons in the d orbital by taking one electron from the s-orbital. This means the new configuration of copper is [Ar]3d^10 4s^1. This is the same rule/exception for Chromium.

Jonathan Cheng 3C
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Re: Exceptions to electron configuration

Postby Jonathan Cheng 3C » Sun Oct 28, 2018 8:57 pm

This occurs because the electron is taking from the s orbital and added to the d orbital to make it more stable. The s orbital now is half filled, which is relatively stable and the the d orbital is completely filled which is stable as well.

Nawaphan Watanasirisuk 3B
Posts: 58
Joined: Tue Nov 28, 2017 3:03 am

Re: Exceptions to electron configuration

Postby Nawaphan Watanasirisuk 3B » Mon Oct 29, 2018 10:28 am

Are the 2 exceptions the only ones we need to know? It seems there are more as you go down the periodic table.


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