Question

differentiate between:

a) valence bond theory and molecular bond theory

b) atomic orbitals and molecular orbitals

Answer 1

VALENCE BOND THEORY (VBT):
1. in VBT, atomic orbitals are obtained by space filling of electron of two different atoms.
2. In VBT atoms retain their property
3. atomic orbitals obtained in VBT are mono-centric in nature.

MOLECULAR ORBITAL THEORY (MOT):
1. molecular orbitals are obtained by linear combinations of atomic orbitals(LACO) method.
2. Atomic orbitals, obtained by this method lose their individual identities.
3. molecular orbitals obtained in MOT are poly-centric in nature.