The process of forming hybrid orbitals is called?

• A. Ionization
• B. Resonance
• C. Hybridization
• D. Dissociation

Answer: (C)

The concept being tested is how atomic orbitals mix to form new, directional orbitals, called hybridization. In valence bond theory, an atom’s valence s and p orbitals mix to create hybrid orbitals that point toward the regions where bonds form. This mixing produces orbitals that are equivalent in energy and shape, giving the molecule its observed geometry. For example, mixing one s and three p orbitals creates four sp3 hybrids arranged in a tetrahedral pattern to explain methane’s shape; mixing one s with two p orbitals gives three sp2 hybrids arranged in a trigonal planar layout for molecules like ethene; mixing one s with one p gives two sp hybrids in a linear arrangement as seen in acetylene.

This process doesn’t involve removing or adding electrons; it’s about reorganizing the valence electron density to enable bonding with specific directions. It’s different from ionization (removing electrons), resonance (delocalization of electrons across multiple structures), or dissociation (breaking bonds).