Final answer:
In chemistry, what we learn about atoms is a simplified model. It represents the structure of an atom based on what we know about how atoms behave, but it is not a true depiction of the exact structure of an atom.
Step-by-step explanation:
Chemistry deals with atoms and molecules and the interactions between them. Atoms and molecules are irreducible nuggets of a substance - the minimum unit that carries the essential properties of that substance. However, what we learn about atoms in chemistry is a simplified model. It is not necessarily a true picture of the exact structure of an atom.