AP EAMCET20227 Jul 2022Evening ShiftChemistryd and f Block ElementsActual
Which of the following elements are not regarded as transition elements?
Options
- AZn , Cd , Hg .
- BCu , Zn , Hg
- CAg , Zn , Hg
- DAg , Cd , Hg
Correct answer
A. Zn , Cd , Hg .
Step-by-step solution
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 d^9 configuration. Electronic configuration of Zn is [ Ar ] 3 d¹⁰ 4 s^2 Electronic configuration of Cd is [ Ar ] 3 d¹⁰ 4 s^2 Electronic configuration of Hg is [ Ar ] 3 d¹⁰ 4 s