Free books, simulations, tools and reference sheets, chosen and shared by teachers and learners. Pick a subject and a level to see what is there.
The official school textbooks, free to read and download. Look for the Science book of your class, or the Chemistry book for classes 11 and 12.
A clear periodic table where you can click an element and see its properties, trends and isotopes. Handy while you read the chapters on the periodic table.
Type the name or formula of a substance and see its structure, properties and uses. It is run by the US National Library of Medicine and is free.
A large open library of chemistry texts written by teachers and professors. Use the search box to find the topic of your chapter.
A complete free chemistry textbook with clear explanations and many exercises, from atoms to equilibrium. Free to read online, from OpenStax at Rice University, licensed under CC BY 4.0.
Test the pH of everyday liquids, and see how dilution changes the number and the ions in the water. Pairs with the lessons on acids, bases and pH. Simulation by PhET Interactive Simulations, University of Colorado Boulder, licensed under CC BY 4.0 (https://phet.colorado.edu).
Add protons, neutrons and electrons, and watch the element, the charge and the mass change. A good partner to the lessons on atoms and isotopes. Simulation by PhET Interactive Simulations, University of Colorado Boulder, licensed under CC BY 4.0 (https://phet.colorado.edu).