State reason for the following
The molecular shape of `Ni(CO)_4` is not the same as that of `[Ni(CN)_4]^(2-)` .

Explanation

Electronic configuration of :
`Ni : [Ar] 4s^2, 3d^8`
Ni (O) :`[Ar] 4s^0 , 3d^(10)`

`[Ni(CO)_4` has `sp^3` hybridisation and has tetrahedral shape.
`[Ni(CN)_4)_2^(-)`
`Ni^(2+) , 4s^0 3d^8`