Aufbau principle

[Samantha Joseph 1F]

Just to clarify—is the Aufbau principle inclusive of the Puali exclusion rule and Hund's rule?

[Ayona Sengupta]

As far as I'm aware, they're closely related and the Aufbau Principle originates from Pauli's exclusion principle. When we're writing out electronic configuration, I guess we just have to be mindful of all three.

[Brigitte Phung 1F]

I agree with Ayona. Also,in the powerpoint, it was written that "we apply Pauli Exclusion Principle and Hund's Rule to determine e- configuration," which is what is accomplished through the Aufbau Principle. Hope this helps!

[Ashin_Jose_1H]

They're related. Pauli's Exclusion Principle and Hund's Rule deals with the arrangement of electrons within an orbital. Aufbau's Principle deals with the arrangement of the orbitals (which orbitals are filled first).

[Cali Rauk1D]

Yes the pauli exclusion states there are no more than 2e- per orbital and Hund's rule says due to e- repulsion, e- in same subshell will occupy different orbitals with parallel spin