Determining principle quantum number

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Matt Jacobs 3H
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Joined: Fri Sep 25, 2015 3:00 am

Determining principle quantum number

Postby Matt Jacobs 3H » Fri Oct 16, 2015 5:41 pm

When you start getting into elements that are located in the first row of the d-block, such as iron (Fe), is the principle quantum number (n) still equal to 4? Or would it be 3 because now electrons are starting to be added to the 3d orbitals?
I always had in mind that the principle quantum number was always the period the element is in (in this case, the fourth period). Need some clarification thank you.

Sandeep Gurram 2E
Posts: 42
Joined: Fri Sep 25, 2015 3:00 am

Re: Determining principle quantum number

Postby Sandeep Gurram 2E » Fri Oct 16, 2015 5:52 pm

The principle quantum number is always the period the element is located in. In this case, iron would have n=4, as it is in the fourth period. Principle quantum number is unrelated to which orbital electrons are being added to.


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