1. Quantum Numbers

2. What are quantum numbers
quantum numbers-numbers used to describe a specific electron in an atom.
Like an address for an e-
there are 4 quantum numbers
n- principle
l- sublevel
ml-orbital (position)
ms-spin

3. Determining n n is which energy level the electron is in.
It can be 1-7
1 s __
2 s __ p __ __ __
3 s __ p __ __ __ d __ __ __ __ __
these numbers

4. Determining l l is the subshell
which type of orbital the electron is in.
s=0
p=1
d=2
f=3

5. Determining ml Orbital which line is the electron on? s 0 p -1 0 1f

6. Determining ms which direction is the electron spinning?
If the arrow is pointing up it is +½
If the arrow is pointing down it is -½

7. Example n = 2 l = 1 ml = -1 ms = -½ 1 s __ 2 s __ p __ __ __
this down arrow in Na
1 s __
2 s __ p __ __ __
3 s __ p __ __ __ d __ __ __ __ __