Here's why:
* Chemistry is the study of matter and its properties, as well as how matter changes. This includes the composition, structure, properties, and reactions of matter.
* Compounds and molecules are fundamental building blocks of matter.
* Interactions between compounds and molecules encompass a wide range of phenomena studied in chemistry, including:
* Chemical bonding: The forces that hold atoms together in molecules.
* Chemical reactions: Processes that involve the rearrangement of atoms and molecules.
* Intermolecular forces: The attractive and repulsive forces between molecules.
* Solutions and mixtures: How compounds and molecules interact when they are combined.
While other branches of science, like biology and physics, also deal with interactions at the molecular level, chemistry is the primary field dedicated to the study of the fundamental principles governing these interactions.