Periodic System of Elements

E   l   e   m   e   n   t          G   r   o   u   p   s  
1a 2a 3b 4b 5b 6b 7b 8b 1b 2b 3a 4a 5a 6a 7a 8a
H                                 He
Li Be                     B C N O F Ne
Na Mg                     Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo   Ru Rh Pd Ag Cd In Sn Sb Te J Xe
Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi      
Rare-Earth Metals Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu  
Uranides Th   U                        


  Elements, which are gasous or form volatile hydrides in combination with hydrogen.
  These elements form saline hydrides in combination with with hydrogen. Their enrichment in the Earth Crust has a factor from 3 (Na) to 280 (Th).
  Elements, which are reduceable to metals by hydrogen. Their deviation from the cosmic abundance correlate with the ionization potential.
  These elements form with stable, high melting carbides in combination with carbon.
  Lead and bismuth are final products of the radioactive decay.