What is LCAO method? How does it lead to the concept of bonding and antibonding molecular orbitals? What are the main points of difference between bonding and antibonding molecular orbitals?

Explain bonding and antibonding molecular orbitals.

How will you differentiate between bonding and anti bonding molecular orbitals ?

What are the main points of difference between valence bond and molecular orbital theories?

Distinguish two aspects of bonding and antibonding molecular orbitals.

How will your differentiate between atomic and molecular orbitals ?

H_(2)^(+) ion contains one electron in bonding and one in antibonding molecular orbitals.

The molecular orbital with the lowest eenrgy is filled first. Thus sigma (1s) is filled first where as 'sigma^(*)(2p) isfilled in thelast, also the maximum number of electron in bonding and antibonding molecular orbitals are according to Pauli and Hund's rule. As an electron in an antibonding molecular orbital cancels out the stability introduced by the electron in a bonding molecular orbital, it means that in order for bonding of atoms to occur there should be an excess of bonding electron sover antibonding electrons. In case where the number of bonding and antibonding electrons are equal, no bond will be formed between the atoms. With the help of above discussion, we can define easily bond order, relative bond length, relative stability and magnetic properties for a molecule. According to MOT which statement is correct about Boron molecule ?

What is the difference between the order of a reaction and its molecularity ?

A bonding molecular orbital has lesser energy than the corresponding antibonding molecular orbital. Justify

Mention the main points of similarities and differences between valence bond and molecular orbital theories.