A Level Chemistry OCR Practice Exam 2025 – All-in-One Guide to Master Your Chemistry Exam!

A structural formula provides insight into how atoms are arranged within a molecule, illustrating not only the types of atoms present but also their connectivity and how they are bonded to one another. It focuses on the relative positions of the atoms and the bonds that connect them, often represented by lines (indicating bonds) between atomic symbols (representing individual atoms). This level of detail allows chemists to visualize the molecular structure and predict its reactivity and properties, which cannot be gleaned from a simple molecular formula.

The other options address different concepts. A detailed 3D model emphasizes spatial arrangement but goes beyond the typical depiction of a structural formula, which does not convey three-dimensional coordinates. A graphical representation of electron distribution delves into a more advanced concept related to molecular orbital theory, which is not captured by a basic structural formula. Lastly, a simplified equation representing chemical composition is more akin to a molecular formula, which does not provide information on how the atoms are bonded or arranged in three dimensions, focusing solely on the quantities and types of atoms present.