Atomic physics focuses on the structure and behavior of atoms, while quantum physics encompasses a broader range of phenomena, including the interactions of all matter at the quantum level. Historically, quantum mechanics was developed to explain atomic structure, leading to the perception that atomic physics is a subset of quantum physics. Although atomic physics provides specific examples and experiments, quantum mechanics has evolved to address more complex interactions beyond just atoms. Atoms remain crucial for experimental validation of quantum theories. Understanding this distinction enhances the appreciation of both fields in the study of matter.