Tabelul periodic (21-36)

• 21 scandiu = Sc
• 22 titan = Ti
• 23 vanadiu = V
• 24 crom = Cr
• 25 mangan = Mn
• 26 fier = Fe
• 27 cobalt = Co
• 28 Nichel = Ni
• 29 Cupru = Cu
• 30 zinc = Zn
• 31 Galiu = Ga
• 32 Germaniu = Ge
• 33 Arsen = As
• 34 Seleniu = Se
• 35 Brom = Br
• 36 Kripton = Kr