Isomers

Isomers are molecules that have the same number and types of atoms but are arranged differently in space. This means they have the same molecular formula but distinct structures, which can affect their properties and how they behave. For example, glucose and fructose both have the same formula (C6H12O6), but their atoms are connected differently, making them different substances. Isomers are important in chemistry because small changes in structure can lead to significant differences in reactivity or biological activity.