Couche de valence
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
Ru
4d75s1
Re
Rf
Ra
Rb
5s1
Rn
Rh
4d85s1
Be
2s2
Ba
Bh
Bi
Bk
Br
...4p5
H
1s1
P
3s23p3
Os
Es
Hg
Ge
...4p2
Gd
Ga
...4p1
Uub
Pr
Pt
Pu
C
2s2p2
Pb
Pa
Pd
4d10
Cd
4d105s2
Po
Pm
Uuu
Hs
Uun
Ho
Hf
K
4s1
He
1s2
Md
Mg
3s2
Mo
4d55s1
Mn
3d54s2
O
2s2p4
Mt
S
3s23p4
W
Zn
3d104s2
Eu
Zr
4d25s2
Er
Ni
3d84s2
No
Na
3s1
Nb
4d45s1
Nd
Ne
2s2p6
Np
Fr
Fe
3d64s2
Fm
B
2s2p1
F
2s2p5
Sr
5s2
N
2s2p3
Kr
...4p6
Si
3s23p2
Sn
...5p2
Sm
V
3d34s2
Sc
3d14s2
Sb
...5p3
Sg
Se
...4p4
Co
3d74s2
Cm
Cl
3s23p5
Ca
4s2
Cf
Ce
Xe
...5p6
Lu
Cs
Cr
3d54s1
Cu
3d104s1
La
Li
2s1
Tl
Tm
Lr
Th
Ti
3d24s2
Te
...5p4
Tb
Tc
4d55s2
Ta
Yb
Db
Dy
I
...5p5
U
Y
4d15s2
Ac
Ag
4d105s1
Ir
Am
Al
3s23p1
As
...4p3
Ar
3s23p6
Au
At
In
...5p1