Energy
Na
11P
11e
Energy
Mg
12P 12e
Energy
Al
13P 13e
Energy
Si
14P 14e
Energy
P
15P 15e
Energy
S
16P 16e
Energy
Cl
17P 17e
Energy
Ar
18P 18e
Energy
Na
Mg Al
Si
P
S
Cl
Ar
Energy
Energy
2 Sub shells
n=3 e shell
Na
Mg Al
Si
P
S
Cl
Ar
Energy
Energy
2 Sub shells
p sub shell
n=3 e shell
s sub shell
Na
Mg Al
Si
P
S
Cl
Ar
Energy
Energy
Energy
Clue to how
electrons fill
p sub shell
s sub shell
Na
Mg Al
Si
P
S
Cl
Ar
Energy
Energy
Filling of
orbitals
2 Sub shells
Energy
p sub shell
s sub shell
Na
Mg Al
Si
P
S
Cl
Ar
Energy
Energy
Filling of
orbitals
2 Sub shells
p sub shell
s sub shell
Na
Mg Al
Si
P
S
Cl
Ar