Tableau de classification périodique

HHe
LiBe BCNOFNe
NaMg AlSiPSClAr
KCaScTi VCrMnFe CoNiCuZn GaGeAsSe BrKr
RbSrYZr NbMoTcRu RhPdAgCd InSnSbTe IXe
CsBa*Hf TaWReOs IrPtAuHg TlPbBiPo AtRn
FrRa**
Lanthanides *LaCePr NdPmSmEu GdTbDyHo ErTmYbLu
Actinides **AcThPa UNpPuAm CmBkCfEs FmMdNoLw