Atomic orbital hybridization is a theoretical mechanism describing the linear combination of atomic orbitals (specifically s and p) to generate new degenerate hybrid orbitals with distinct geometries, character ratios, and energy levels determined by quantum mechanical principles such as Heisenberg's uncertainty principle. This formalism explains the formation of sigma bonds through orbital overlap in carbon atoms while unhybridized p-orbitals form pi bonds, establishing a strict correlation between bond multiplicity (single vs. double/triple) and molecular stability where sigma bonds possess greater strength than pi bonds due to superior overlapping efficiency.
Valence bond theory explains covalent bonding as the pairing of unpaired electrons in overlapping atomic orbitals, classified by symmetry into sigma bonds (cylindrically symmetric, no nodal plane alo…