The mixing of s and p orbitals to form hybrid orbitals typically requires the absorption of energy. This process is known as hybridization. When an atom undergoes hybridization, the atomic orbitals involved (such as s and p orbitals) combine to form new hybrid orbitals that have different shapes and energies. This energy is typically provided through the absorption of photons or other forms of external energy. Once the hybridization is complete, the hybrid orbitals can participate in bonding with other atoms to form new molecular orbitals.