Question

Why is the concept of hybridization required in valence bond theory?

a) To explain the shape of molecules.
b) To account for the observed bond angles.
c) To rationalize the mixing of atomic orbitals.
d) To determine the number of π bonds.

Answer 1

Hybridization is required in valence bond theory to rationalize the mixing of atomic orbitals and explain molecular geometries and bond angles in molecules.

Step-by-step explanation:

The concept of hybridization is required in valence bond theory to rationalize the mixing of atomic orbitals (c). When atoms bond to form molecules, the atomic orbitals are not sufficient to describe the regions where electrons will be located in the molecule.

Hybridization allows us to combine atomic orbitals to create new hybrid orbitals that are properly oriented to form bonds. These hybrid orbitals can better explain the molecular geometries and observed bond angles of molecules.