The branch of physics that deals with structure of atom and properties of atom is:

Explanation

Atomic physics is the correct answer. It is a branch of physics that focuses on the study of atoms, including their structure, behavior, and interactions. Atomic physicists investigate the electronic structure of atoms, the behavior of electrons, and the interactions between electrons and electromagnetic radiation. Topics within atomic physics include atomic spectroscopy, quantum mechanics applied to atoms, and the understanding of atomic energy levels.