A structural formula is a representation of a chemical compound that shows the arrangement of atoms and the bonds between them. It provides more detail than a molecular formula, which only indicates the number of each type of atom. Structural formulas can depict single, double, or triple bonds and can illustrate the three-dimensional shape of the molecule. There are different types of structural formulas, including condensed structural formulas and skeletal formulas. Condensed structural formulas group atoms together to simplify the representation, while skeletal formulas use lines to represent bonds and show the carbon backbone of organic compounds.