
Chemistry - Wikipedia
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 …
PubChem
Search and explore chemical information in the world's largest free chemistry database. Search chemicals by name, molecular formula, structure, and other identifiers.
Chemistry | Definition, Topics, Types, History, & Facts | Britannica
Sep 23, 2025 · Chemistry is the science of the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the …
Chemistry archive | Science | Khan Academy
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 …
General Chemistry 1 — Open & Free - OLI
General Chemistry 1 is a highly interactive and engaging course that covers all topics typical of first semester General Chemistry. The course includes a multitude of formative practice …
Home - Chemistry LibreTexts
The LibreTexts approach is highly collaborative where an Open Access textbook environment is under constant revision by students, faculty, and outside experts to supplant conventional …
CK-12 Chemistry for High School - CK-12 Foundation
Sep 8, 2025 · CK-12 Chemistry for High School FlexBook® covers core chemistry concepts and includes SIMs, PLIX, real world examples, and videos.
High school chemistry | Science | Khan Academy
Welcome to high school chemistry! In this course, you’ll explore the fascinating world of atoms and molecules. Learn about atomic structure, isotopes and ions, the periodic table, chemical …
Chemistry - ThoughtCo
Learn about chemical reactions, elements, and the periodic table with these resources for students and teachers.
OpenStax
OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!