[Ni(CN)4]2- is square planar and diamagnetic

[NiCl4]2- is tetrahedral and paramagnetic

[Ni(CN)4]2- is dsp2 hybridized

[Ni(CN)4]2- is paramagnetic

5

4

3

6

${\rm{S}}{{\rm{F}}_4}$

${\rm{O}}{{\rm{F}}_2}$

${\rm{O}}{{\rm{F}}_4}$

${{\rm{O}}_2}{{\rm{F}}_2}$

square planar, paramagnetic

tetrahedral, diamagnetic

square planar, diamagnetic

tetrahedral, paramagnetic

$sp^3$

$sp^2$

$sp$

$dsp^2$

$dsp^2$, diamagnetic

$sp^3$, paramagnetic

$dsp^2$, paramagnetic

$sp^3$, diamagnetic

It is diamagnetic and inner orbital complex

It is diamagnetic and outer orbital complex

It is paramagnetic and inner orbital complex

It is paramagnetic and outer orbital complex

$sp^3$ hybridization, resulting in bond angles of $109.5^\circ$.

$sp^3d$ hybridization, resulting in bond angles of $90^\circ$ and $120^\circ$.

$sp^3d^2$ hybridization, resulting in bond angles of $90^\circ$.

$dsp^3$ hybridization, resulting in bond angles of $120^\circ$.

$90^\circ$

$109.5^\circ$

$120^\circ$

$180^\circ$

The number of unpaired electrons

The number of paired electrons

The total number of electrons

The number of protons

Single electron

Paired electron

Single electron with parallel spin

Single electron with opposite spin