how we come to know whether its sp, sp2, sp3d or sp3d2 hybridisation

H = 1/2 (V + M - C +A)

H is no of orbitals involved in hybridisation

V = No. of electrons in teh valence shell of the cenytral atom

M = No. of monovalent atoms

C = Charge on cation

A = Charge on anion

 

If H = 2 sp

= 3 sp²

= 4 sp³

= 5 sp³d

= 6 sp³d²

= 7 sp³d³