Chemical structure refers to the arrangement of atoms within a molecule and how they are bonded together. It provides insight into the molecule's properties and behavior. The structure can be represented in various ways, including structural formulas, which show the connections between atoms, and three-dimensional models that illustrate the spatial arrangement. Understanding chemical structure is essential in fields like chemistry, biochemistry, and pharmacology. It helps scientists predict how substances will react with one another and how they will interact in biological systems. Different structures can lead to vastly different properties, influencing everything from the effectiveness of a drug to the stability of a material.