`In[ZnBr_(4)]^(2-)` electron pairs in `sp^(3)` hybrid orbitals of the zinc atom form bonds to the bromineatoms Determine the number of unpaired electrons in the complex .

Explanation

`[ZnBr_(4)]^(2+)` oxidation state of Zn is + 2
Electronic configuration of `Zn (Z =30)implies3d^(10) 4s^(2)`
`implies Zn^(2+) =3d^(10)`

Since the d-orbitals are completely filled there are no unpaired electrons .