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