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Determining principle quantum number

Posted: Fri Oct 16, 2015 5:41 pm
by Matt Jacobs 3H
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.

Re: Determining principle quantum number

Posted: Fri Oct 16, 2015 5:52 pm
by Sandeep Gurram 2E
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.