The Aufbau principle
|
Y
|
Zr
|
Nb |
Mo
|
Tc
|
Ru
|
Rh
|
Pd
|
Ag
|
Cd
|
In
|
Sn
|
Sb
|
Te
|
I
|
Xe
|
||
|
Cs
|
Ba
|
La
|
Hf
|
Ta
|
W
|
Re
|
Os
|
Ir
|
Pt
|
Au
|
Hg
|
Tl
|
Pb
|
Bi
|
Po
|
At
|
Rn
|
|
Fr
|
Ra
|
Ac
|
|||||||||||||||
|
Ce
|
Pr
|
Nd
|
Pm
|
Sm
|
Eu
|
Gd
|
Tb
|
Dy
|
Ho
|
Er
|
Tm
|
Yb
|
Lu
|
||||
|
Th
|
Pa
|
U
|
Np
|
Pu
|
Am
|
Cm
|
Bk
|
Cf
|
Es
|
Fm
|
Md
|
No
|
Lr
|