All the aufbau rules are reviewed.

Note: some previous lectures are missing.  Specifically, Hund's rule is not available.  This rule states that, if possible, the values of ml change before ms.

The table completed is

atom
 electrons
 n
 l
 ml
 ms
H
 1
 1
 0
 0
 +1/2*
He
 2
 1
 0
 0
 -1/2
Li
 3
 2
 0
 0
 +1/2*
Be
 4
 2
 0
 0
 -1/2
B
 5
 2
 1
 1*
 +1/2*
C
 6
 2
 1
 0*
 +1/2**
N
 7
 2
 1
 -1
 +1/2**
O
 8
 2
 1
 1*
 -1/2
F
 9
 2
 1
 0*
 -1/2
Ne
 10
 2
 1
 -1
 -1/2

*arbitrary at this point.

** because of Hund's rule