Question

what is valence bond theory

Answer 1

Definition: Valence bond theory is a chemical bonding theory that explains the bonding between two atoms is caused by the overlap of half-filled atomic orbitals. The two atoms share each other's unpaired electron to form a filled orbital to form a hybrid orbital and bond together.

Answer 2

Valence Bond theory :

1. Electrons present in the molecule are localised as if they are in isolated atoms.

2. The Atomic orbitals of the combining atoms retain their individual identity.

3. It involves only the increase in the electron density in the region of orbital overlap.

4. The number of covalent bonds formed is equal to the number of combining orbitals.

5. This theory doesn't help in predicting the paramagnetic or diamagnetic behaviour of molecules.

6. It is easy to apply.

7. In this theory resonance is considered.