What are the key ideas of MO theory? OR What are the salient feature

1.	What are the key ideas of MO theory? OR What are the salient features of MO theory?
Answer» Key ideas of MO Theory : MOs in molecules are similar to AOs of atoms. Molecular orbital describes region of space in the molecule representing the probability of an electron. MOs are formed by combining AOs of different atoms. The number of MOs formed is equal to the number of AOs combined. Atomic orbitals of comparable energies and proper symmetry combine to form molecular orbitals. MOs those are lower in energy than the starting AOs are bonding MOs and those higher in energy are antibonding MOs. The electrons are filled in MOs beginning with the lowest energy. Only two electrons occupy each molecular orbital and they have opposite spins, that is, their spins are paired. The bond order of the molecule can be calculated from the number of bonding and antibonding electrons.

What are the key ideas of MO theory? OR What are the salient features of MO theory?

Answer»

Key ideas of MO Theory :

MOs in molecules are similar to AOs of atoms. Molecular orbital describes region of space in the molecule representing the probability of an electron.
MOs are formed by combining AOs of different atoms. The number of MOs formed is equal to the number of AOs combined.
Atomic orbitals of comparable energies and proper symmetry combine to form molecular orbitals.
MOs those are lower in energy than the starting AOs are bonding MOs and those higher in energy are antibonding MOs.
The electrons are filled in MOs beginning with the lowest energy.
Only two electrons occupy each molecular orbital and they have opposite spins, that is, their spins are paired.
The bond order of the molecule can be calculated from the number of bonding and antibonding electrons.