Write the important conditions required for the linear combination of atomic orbitals to form molecular orbitals.

Explanation

The given conditions should be satisfied by atomic orbitals to form molecular orbitals:
(a) The combining atomic orbitals must have the same or nearly the same energuy. This means that in a homonuclear molecule, the 1s-atomic orbital of an atom can combine with the 1s-atomic orbital of another atom, and not with the 2s-orbital.
(b) The combining atomic orbitals must have proper orientatins to ensure that the overlap is maximum.
( c) The extent of overlapping should be large.