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 careful …

Chemistry is the study of matter and the changes it undergoes.

Feb 3, 2026 · Chemistry is the study of substances—that is, elements and compounds —while biology is the study of living things. However, these two branches of science meet in the discipline of …

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 is called …

Oct 3, 2019 · Learn how chemistry, the study of matter and energy and how they interact, find out what chemists do, and discover why it's an important subject to study.

Download free-response questions from past AP Chemistry exams, along with scoring guidelines, sample responses from exam takers, and scoring distributions.

Feb 13, 2026 · 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 discipline chiefly concerned...