21   Scandium  Sc
22   Titanium  Ti
23   Vanadium  V
24   Chromium  Cr
25   Manganese Mn
26   Iron      Fe
27   Cobalt    Co
28   Nickel    Ni
29   Copper    Cu
30   Zinc      Zn
31   Gallium   Ga
32   Germanium Ge
33   Arsenic   As
34   Selenium  Se
35   Bromium   Br