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Periodensystem nach Anzahl natürliche Isotope. - Das Periodensystem online
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I H         Creative Commons Lizenzvertrag He I
II Li Be B C N O F Ne II
III Na Mg Al Si P S Cl Ar III
IV K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr IV
V Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe V
VI Cs Ba Ln Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn VI
VII Fr Ra An Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og VII
  Gehe zu Element:  
Ln Lanthanoide: La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu   Ln
An Actinoide: Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr   An
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