Chemistry, as a body of knowledge distinct from alchemy, became an established science with the work of Antoine Lavoisier, who developed a law of conservation of mass that demanded …

Nov 8, 2025 · chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the …

Chemistry is the study of matter—what it consists of, what its properties are, and how it changes. Being able to describe the ingredients in a cake and how they change when the cake is baked …

The chemistry archive contains legacy chemistry content, and is not being updated with new content. For our most up-to-date, mastery-enabled courses, check out Middle School …

Learn about chemical reactions, elements, and the periodic table with these resources for students and teachers.

Chemistry is the study of matter, analysing its structure, properties and behaviour to see what happens when they change in chemical reactions. As such, it can be considered a branch of …

This course provides an introduction to the chemistry of biological, inorganic, and organic molecules. The emphasis is on basic principles of atomic and molecular electronic structure, …

Oct 8, 2025 · Chemistry coverage from Scientific American, featuring news and articles about advances in the field.

Nov 6, 2025 · Chemistry is a branch of science that involves the study of the composition, structure and properties of matter. Often known as the central science, it is a creative …

Search and explore chemical information in the world's largest free chemistry database. Search chemicals by name, molecular formula, structure, and other identifiers.