:Template:Infobox element/symbol-to-valence-group
{{#switch:{{{symbol|}}}
| La | Ce | Pr | Nd | Pm | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb = -
| Ac | Th | Pa | U | Np | Pu | Am | Cm | Bk | Cf | Es | Fm | Md | No = -
| Ubu | Ubb | Ubt | Ubq | Ubp | Ubh | Ubs | Ubo = -
| H | Li | Na | K | Rb | Cs | Fr | Uue = I
| Be | Mg | Ca | Sr | Ba | Ra | Ubn = II
| Sc | Y | Lu | Lr = III
| Ti | Zr | Hf | Rf = IV
| V | Nb | Ta | Db = V
| Cr | Mo | W | Sg = VI
| Mn | Tc | Re | Bh = VII
| Fe | Ru | Os | Hs = VIII
| Co | Rh | Ir | Mt = VIII
| Ni | Pd | Pt | Ds = VIII
| Cu | Ag | Au | Rg = I
| Zn | Cd | Hg | Cn = II
| B | Al | Ga | In | Tl | Nh = III
| C | Si | Ge | Sn | Pb | Fl = IV
| N | P | As | Sb | Bi | Mc = V
| O | S | Se | Te | Po | Lv = VI
| F | Cl | Br | I | At | Ts = VII
| He | Ne | Ar | Kr | Xe | Rn | Og = 0
|#default = {{{default|}}}
}}