Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a …

Aug 14, 2025 · Interactive, hands-on learning Science is best learned through doing. So at Khan Academy, we go beyond videos and quizzes. Hands-on activities prompt students to explore and …

A summary of math and science knowledge to get you ready for learning chemistry on Khan Academy!

There are people who would've done anything 100 years ago to get the answers that are in your chemistry book today or that you can learn from your chemistry teacher or that you can learn from a …

Learn high school chemistry using videos, articles, and NGSS-aligned practice. Explore the fundamentals of atomic structure, chemical bonding, chemical reactions, thermochemistry, solutions, …

Learn chemistry using videos, articles, and NGSS-aligned practice exercises. Explore the world of elements, compounds, and mixtures, learn about the periodic table, understand physical properties …

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 Chemistry, High School …

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Learn AP Chemistry using videos, articles, and AP-aligned practice. Review the fundamentals of atomic structure, intermolecular forces and bonding, chemical reactions, kinetics, thermodynamics, and …

Learn how to name and identify acids and bases from their formulas and physical observations in the lab. Discover the distinction between strong and weak electrolytes and their significance in acid-base …