Number of complexes having $S{P}^3$  hybridization 

$\left[\mathrm{Ni}\right(\mathrm{CO}{)}_4],{\left[\mathrm{Zn}\right({\mathrm{NH}}_3{)}_4]}^{+2},{\left[{\mathrm{ZnCl}}_4\right]}^{2-},{\left[{\mathrm{PdCl}}_4\right]}^{2-},{\left[{\mathrm{PdBr}}_4\right]}^{2-}$

$$\begin{gathered} \left[\mathrm{Ni}\right(\mathrm{CO}{)}_4]\to {\mathrm{Ni}}^{\left(0\right)}\to {\mathrm{d}}^{10} \to {\mathrm{sp}}^3\to \mathrm{tetrahedral} \\ {\left[\mathrm{Zn}\right({\mathrm{NH}}_3{)}_4]}^{+2}\to {\mathrm{Zn}}^{\left(\mathrm{II}\right)}\to {\mathrm{d}}^{10} \to {\mathrm{sp}}^3\to \mathrm{tetrahedral} \\ {\left[{\mathrm{ZnCl}}_4\right]}^{2-}\to {\mathrm{Zn}}^{\left(\mathrm{II}\right)}\to {\mathrm{d}}^{10} \to {\mathrm{sp}}^3\to \mathrm{tetrahedral} \\ {\left[{\mathrm{PdCl}}_4\right]}^{2-}\to {\mathrm{Pd}}^{\left(\mathrm{II}\right)}\to {\mathrm{d}}^8 \to {\mathrm{dsp}}^2\to \mathrm{square} \mathrm{planar} \\ {\left[{\mathrm{PdBr}}_4\right]}^{2-}\to {\mathrm{Pd}}^{\left(\mathrm{II}\right)}\to {\mathrm{d}}^8 \to {\mathrm{dsp}}^2\to \mathrm{square} \mathrm{planar} \end{gathered}$$