Write the electron configuration for the atom using the
following design;
(1s)(2s,2p)(3s,3p)
(3d) (4s,4p) (4d) (4f)
(5s,5p)
FOR S OR P 0.35 FOR EACH ELECTRON IN SAME GROUP
                    Â
0.85 FOR EACH ELECTRON ONE SHELL LOWER
                     Â
1.0 FOREACH ELECTRON 2 SHELLS LOWER
   FOR D OR F 0.35 FOR EACH ELECTRON IN SAME
GROUP
                         Â
1.0 FOR REMAINING SHELLS
          Â
FOR P FOR 3P e =2*1+8*1+2*1+2*0.35=12.70
                   Â
Z=15-13.05=1.95
         FOR Co
FOR 3S =2+8+15*0.85+1*0.35=23.10
                   Â
Z=27-23.10=3.90
         FOR Mn FR
3D =2+8+8+1.40=19.40
                     Â
Z=25-19.40=5.60
