Which of the following contains an 18-electron structure ?

Options

A. `Cu^(+)`
B. `Zn^(2+)`
C. `Hg^(2+)`
D. All of these

Answer

D

Explanation

`18e^(-)` structure `rArr` which has `18e^(-) (s^2p^6d^10) ` in the outermost shell .