https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-reactions/x2613d8165d88df5e:representing-chemical-reactions/v/physical-and-chemical-changes 2023-12-15T18:39:28.793791463Z Physical and chemical changes Physical and chemical processes can be classified by the changes occurring on the molecular level. In general, chemical processes involve changes in chemical bonds, while physical processes involve changes only in intermolecular forces. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/13f405e4-0927-4fb9-9b5e-913f069d17f9_1280_720_base.png Physical and chemical changes Physical and chemical processes can be classified by the changes occurring on the molecular level. In general, chemical processes involve changes in chemical bonds, while physical processes involve changes only in intermolecular forces. https://cdn.kastatic.org/ka-youtube-converted/n5cZ5CWuUJA.mp4/n5cZ5CWuUJA.mp4 279 Chemical change and Chemical Bond https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-reactions/x2613d8165d88df5e:representing-chemical-reactions/v/intro-to-chemical-reactions-chemical-equation-and-reactions-chemistry-khan-academy 2026-04-08T23:10:43.121622596Z Intro to chemical equations Bonds between atoms or molecules are formed and/or broken during chemical reactions. Reactants are the inputs of a chemical reaction, and products are the outputs. Sal Khan video https://cdn.kastatic.org/googleusercontent/Z75oD-cJiGwdzgfe95kVhOnyPxF8KNuBGQi7d-Ap3DODJyIvHBOSqYwhAfUwvnRe4fqwLMRjq-YdEXlqakSM_ws Intro to chemical equations Bonds between atoms or molecules are formed and/or broken during chemical reactions. Reactants are the inputs of a chemical reaction, and products are the outputs. https://cdn.kastatic.org/ka-youtube-converted/1wQqGFebxyA.mp4/1wQqGFebxyA.mp4 344 Chemical change and Chemical Bond https://www.khanacademy.org/science/ap-biology/chemistry-of-life/introduction-to-biological-macromolecules/v/ionic-bonds 2023-03-31T23:16:47.953017837Z Ionic bonds Atoms interact with each other through the formation of chemical bonds. One type of chemical bond is an ionic bond. Ionic bonds result from the attraction between oppositely charged ions. For example, sodium cations (positively charged ions) and chlorine anions (negatively charged ions) are connected via ionic bonds in sodium chloride, or table salt. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/78c67bc9-cdff-44b8-b61d-e44a9f9f0e4d_1280_720_base.png Ionic bonds Atoms interact with each other through the formation of chemical bonds. One type of chemical bond is an ionic bond. Ionic bonds result from the attraction between oppositely charged ions. For example, sodium cations (positively charged ions) and chlorine anions (negatively charged ions) are connected via ionic bonds in sodium chloride, or table salt. https://cdn.kastatic.org/ka-youtube-converted/FaeAurHnQJs.mp4/FaeAurHnQJs.mp4 250 Chemical change and Chemical Bond https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-reactions/x2613d8165d88df5e:representing-chemical-reactions/e/apply-representing-chemical-reactions 2026-03-02T06:20:38.576309557Z Apply: representing chemical reactions Apply your understanding of using chemical equations to represent chemical reactions in this set of free practice questions. Fig exercise