Transition elements are characterised by partially filled (n−1)d subshells. Zn,Cd,Hg,Cu and Ag all have completely filled (n−1)d subshell. But Zn,Cd, and Hg are not considered as transition metals as in their most common oxidation state, i.e. +2, they have d10 configuration. Whereas Cu and Ag when exists in +2 oxidation state have d9 configuration. Electronic configuration of Zn is [Ar]3d104s2 Electronic configuration of Cd is [Ar]3d104s2 Electronic configuration of Hg is [Ar]3d104s12 Electronic configuration of Cu is [Ar]3d104s1 Electronic configuration of Ag is [Ar] d104s1
