This book introduces the fundamental quantum physics of atoms and molecules. Divided into three parts, the first provides a historical perspective, which leads to the contemporary view of atomic and molecular physics, outlining the principles of non-relativistic quantum mechanics. The second part covers the physical description of atoms and their interaction with radiation, whilst the third part deals with molecular physics.

This is the first volume of a series of three, focusing on a selected set of topics whilst also providing substantial, in-depth coverage of atomic, molecular, solid-state and statistical physics. Emphasis is given to the underlying physical basis or principle for each topic, and pedogogical features include conceptual layout sections that define the goals of each chapter, a simplified but rigorous mathematical apparatus and a thorough discussion of approximations are used to develop the adopted physical models.

This accessible text is designed to accompany a one-semester undergraduate course and offers indispensable basic knowledge for any student in physics, chemistry, and materials science or engineering, and it will be enjoyed by anyone trying to enter the realm of atoms and molecules and how we understand them.