Question

what is meant by valency bond theory?

Answer 1

Valency bond theory is a chemical bonding theory that explains the bonding between two atoms is caused by the over lap of half - filled atomic orbitals.the two atoms share each others unpaired electron to form of a field orbital to form of a hybrid orbital and Bond together

Answer 2

Some points on Valency Bond theory are as follows:-

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.