In the formation of molecules, the atomic orbitals of the atoms may hybridise.
1) It is the process of mixing up of atomic orbitals of an atom to form identical hybrid orbitals.
2) This takes place only during the formation of bond.
3) There should not be much difference in the energies of the orbitals that hybridise.
4) The number of hybrid orbitals formed is equal to the number of hybridising atomic orbitals.
5) Hybrid orbitals form o bonds only not n bonds.