What type of reaction takes place when two or more substances react to form a compound?

The type of reaction that occurs when two or more substances combine to form a compound is known as a composition reaction, also referred to as a synthesis reaction. In this process, the reactants, which can be elements or simpler compounds, combine in a chemical reaction to create a more complex substance, or compound. This type of reaction can be represented by the general formula A + B → AB, where A and B are the reactants that combine to create the product AB.

Composition reactions are fundamental in chemistry because they illustrate how basic elements and simpler compounds can combine to form new materials, which can have entirely different properties from the original substances. Understanding this reaction type is essential for grasping concepts in both chemistry and the formation of new materials in various scientific fields.