The question requires us to comment on what are the subjects studied by Chemistry.
Chemistry is the study of all matter and the transformations that this matter undergo. As matter exists in macroscope (all of we can see, touch and measure directly), microscope (the small particles that compose all matter) and submicroscope (the smallest particles that make up the microscope particles) forms, we can say that Chemistry englobes the study of macroscope, microscope and submicroscope matter.