Posted by **Bryan** on Tuesday, October 24, 2006 at 5:31pm.

I have to fill in the blank

with the a term, short phrase or number

The Blank describes the sequence in which orbitals are filled.

Is it The Pauli exclusion principle??

No. The Pauli exclusion principle states that no two electrons may occupy the same energy position.

What is the Aufbau Principle?

http://www.iun.edu/~cpanhd/C101webnotes/modern-atomic-theory/aufbau-principle.html
The Aufbau Principle

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