chemical composition

Chemical composition refers to the specific types and amounts of elements or compounds that make up a substance. It describes what materials are present and their proportions, providing insight into a substance’s structure and properties. For example, water's chemical composition is two hydrogen atoms bonded to one oxygen atom (H₂O). Understanding the chemical composition helps scientists and professionals predict behavior, interactions, and characteristics of materials, and is essential in fields like chemistry, biology, and manufacturing. It’s a detailed way of describing what something is made of at a molecular or atomic level.