Atomic Structure - Aufbau Principle

Writing electronic configuration of the various elements require us to make use of the Aufbau Principle. This is because it is not all the electrons found in the principal quantum shell have the same amount of energy.

In each principal quantum shell (except when n=1), there are subshells. These subshells do not have the same energy level. Hence, they are not filled at the same time.

Below is the video which summaries the different energy level as well as a short description to how Aufbau Principle works. This video will make use of nitrogen and manganese to demonstrate how the principle works in the writing of electronic configuration.


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^{Article written by Kwok YL 2011.}

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