This document discusses different chemical bonding theories including: - Covalent bonding which occurs when atoms share electron pairs - Ionic bonding which involves a complete transfer of electrons between atoms - Lewis structures which represent bonding using shared electron pairs and the octet rule - VSEPR theory which predicts molecular geometry based on electron pair repulsion - Hybridization which involves mixing of atomic orbitals to form new hybrid orbitals - Molecular orbital theory where atomic orbitals combine to form molecular orbitals of lower energy, providing stable bonding.