Valencias:
| 1 | 2 | 6 | 7 | 8 | 8 | 8 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| H 1 |
He | |||||||||||||
| Li 1 |
Be 2 |
B 3 |
C 2, 4 |
N 3, 5 |
O 2 |
F 1 |
Ne | |||||||
| Na 1 |
Mg 2 |
Al 3 |
Si 2, 4 |
P 3, 5 |
S 2, 4, 6 |
Cl 1, 3, 5, 7 |
Ar | |||||||
| K 1 |
Ca 2 |
Cr 2, 3, 6 |
Mn 2 a 7 |
Fe 2, 3 |
Co 2, 3 |
Ni 2, 3 |
Cu 1, 2 |
Zn 2 |
Ga 3 |
Ge 2, 4 |
As 3, 5 |
Se 2, 4, 6 |
Br 1, 3, 5, 7 |
Kr |
| Rb 1 |
Sr 2 |
Mb | Tc | Ru | Rh | Pd 2, 4 |
Ag 1 |
Cd 2 |
In 3 |
Sn 2, 4 |
Sb 3, 5 |
Te 2, 4, 6 |
I 1, 3, 5, 7 |
Xe |
| Cs 1 |
Ba 2 |
W | Re | Os | Ir | Pt 2, 4 |
Au 1, 3 |
Hg 1, 2 |
Tl 3 |
Pb 2, 4 |
Bi 3, 5 |
Po 2, 4, 6 |
At 1, 3, 5, 7 |
Rn |
| Fr 1 |
Ra 2 |
Rf | Bh |
Versión: 2.0 (Marzo, 2009)
