9.7 Molecular Orbital (MO)Theory 分子轨道理论 What's a MO Atomic Orbitals (AO) Wave functions ( Molecular Orbitals (MO) Different‘shapes': -Molecular Obitals (MO):o(sigma)and (pi)bond -Atomic Orbitals (AO):s,p,d,f,etc.9.7 Molecular Orbital (MO) Theory Atomic Orbitals ( ) Wave functions ( ) Molecular Orbitals ( ) A MO O ψ    分子轨道理论 Different ‘shapes’: – Molecular Obitals (MO): σ (sigma) and π (pi) bond – Atomic Orbitals (AO): s, p, d, f, etc