Posted by **Jordan** on Monday, July 18, 2011 at 10:57am.

I need help. In simple english please, what is Hund's Rule, Pauli Exclusion Principal, and the Aufbau Principal? I need to know these. Please try to be simple as possible because I'm not understanding right now, haha.

Thanks!! :)

- AP HS Chemistry -
**bobpursley**, Monday, July 18, 2011 at 12:34pm
Hund's rule: Electrons will occupy single orbits in different orbitals before any orbital has a pair of electrons.

ie: if you have three electrons to put in to three empty p orbitals, then one electron will go into each orbital, in no case will two go into one orbital before each orbital has at least one eletctron.

Pauli Exclusion: No electron can have the same set of quantum numbers, ie, no two electrons can occupy the same exact energy state in an atom.

Aufbau: This is a principle that says if an atom has empty electron positions, the and you start filling the available energy levels, each electron will go into the lowest energy level then currently available (remember pauli on this).

## Answer This Question

## Related Questions

- Chemistry Help - The orbital diagram shown here has some mistakes in it. ...
- Chemistry - I have to fill in the blank with the a term, short phrase or number ...
- Chemistry Help!!!!!!!!!!!!!! - for the following elements show the allocation of...
- Math - Pre Algebra - Simple and Compound Interest Find the simple interest. ...
- reading/language please check - *principle or principal(do these make sense?) -...
- english - I need help understanding simple subjects and simple predicates. The ...
- Math - Principal is $1,800. Rate is 10%. Simple Interest is $360. What's the ...
- Math - Rate is 9%. Time is 4 years. Simple interest is $354.60. What's the ...
- english - I need to find the simple subject and simple predicate: Every sentence...
- algebra - Need mathamatical expression. The simple interest rate, given that the...

More Related Questions