Elements of Quantum Chemistry textbook are for all level in Chemistry courses or a senior level course in Quantum Chemistry. It assumes very little background in physics and mathematics. All necessary mathematical and physical concepts are introduced and developed in the text. Although much of the material is timeless, the book has been selectively updated throughout, with perhaps the most significant revision being the incorporation of computer power. This book has also included a series of short math "refresher" inserts spaced intermittently throughout the book to help students focus on the physical principles being explained rather than struggling with the underlying mathematics. Each chapter includes a broad range of problems and exercises.