Match species are given in Column I with the electronic configuration given in Column II.
Column I Column II
matching species given in Column I with the electronic configuration given in Column II
(i)Cr -(c)[Ar]3d54s-1
(ii)Fe2+ -(b)[Ar]3d6 4s0
(iii)Ni2+- (a)[Ar]3d8 4s0
(iv) Cu-(d)[Ar]3d104s1 .