Atom smatter is a term that refers to the smallest possible unit of matter. It is often used in the context of nuclear physics and refers to the breaking apart of atoms into their constituent particles. Synonyms for this term include atomic particle, atomic nucleus, subatomic particle, and nuclear particle. These terms are all used to describe the smallest, indivisible components of matter. The study of these particles is essential to understanding the behavior and properties of matter, as well as the interactions that take place between different atoms and molecules. Mastery of these terms is fundamental to the study of physics and chemistry.