Molecular Orbital (MO)Theory Molecular Orbitals from Is Atomic Orbitals: Two A0s Two MOs An antibonding Node Molecular Orbital has higher energy s and lower stability Antibonding MO A bonding 61 Molecular Orbital Bonding MO has lower energy H Atomic orbitals H2 Molecular orbitals and greater stability No.ofMO=No.ofAO used to“make”themMolecular Orbital (MO) Theory Two AOs Two MOs An antibonding Molecular Orbital has higher energy and lower stability Molecular Orbitals from 1s Atomic Orbitals: No. of MO = No. of AO used to “make” them. A bonding Molecular Orbital has lower energy and greater stability