Question

what are the assumptions of molecular orbital theory ??

Answer 1

atomic orbitals combine (overlap) to form a new orbital known as molecular orbital. As a result, the atomic oritals loose their identity.

The molecular orbitals are the energy states of a molecule, in which the electrons of the molecule are filled just like in case of atomic orbitals.

An M.O gives electron probability distribution around a group of nuclei (as M.O always contain two nuclei)same as the atomic orbitals.

Only those A.Os are combined to form M.Os which have comparable energy, and orientations. For ex: 1s can combine with 1s and not with 2s as they have energy gap. Similarly, s-orbital can combine with pz but not with px or py as the z-axis is inter nuclear axis and so oriented in line of s-orbital but others are perpendicula