Chemical representation refers to the methods used to depict the structure and composition of chemical substances. This includes formulas, such as molecular formulas that show the types and numbers of atoms in a molecule, and structural formulas that illustrate how atoms are connected. These representations help scientists communicate complex information about compounds clearly and concisely. Common types of chemical representation include Lewis structures, ball-and-stick models, and space-filling models. Each method provides different insights into the properties and behaviors of molecules. For example, Lewis structures emphasize electron sharing and bonding, while ball-and-stick models visually represent the three-dimensional arrangement of atoms.