https://www.khanacademy.org/science/in-in-class-12th-physics-india/nuclei/in-in-nuclear-physics/v/mass-defect-and-binding-energy 2021-01-04T18:35:19Z Mass defect and binding energy Nuclear binding energy is the energy required to split an atom’s nucleus into protons and neutrons. Mass defect is the difference between the predicted mass and the actual mass of an atom's nucleus. The binding energy of a system can appear as extra mass, which accounts for this difference. Jay video https://cdn.kastatic.org/googleusercontent/_1kyHMdSM9rvHuwzKCMLhCxboGbX6T1-sC0F6yGAavlgAuEJRUkUCqpsyBdEmJnJm6ALT02ri0iY2_e8gCHDcABU Mass defect and binding energy Nuclear binding energy is the energy required to split an atom’s nucleus into protons and neutrons. Mass defect is the difference between the predicted mass and the actual mass of an atom's nucleus. The binding energy of a system can appear as extra mass, which accounts for this difference. https://cdn.kastatic.org/ka-youtube-converted/9b8qZ6OHZ5s.mp4/9b8qZ6OHZ5s.mp4 688 Nuclear energy, mass-energy equivalence, and binding energy https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:nuclear-chemistry-hs/x2613d8165d88df5e:nuclear-fusion/v/nuclear-fusion 2024-06-13T01:38:36.313442654Z Nuclear fusion During nuclear fusion, two or more nuclei combine to form a different nucleus. When light nuclei fuse to produce a nucleus lighter than iron, energy is released (exothermic). When heavy nuclei fuse to produce a nucleus heavier than iron, energy is absorbed (endothermic). The release or absorption of energy relates to the difference in total mass of the reactants and products by E=mc^2. Nuclear fusion powers the Sun and other stars. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/6d7d13f4-ecd4-4d6e-a6e8-10fdd18ed56c_1280_720_base.png Nuclear fusion During nuclear fusion, two or more nuclei combine to form a different nucleus. When light nuclei fuse to produce a nucleus lighter than iron, energy is released (exothermic). When heavy nuclei fuse to produce a nucleus heavier than iron, energy is absorbed (endothermic). The release or absorption of energy relates to the difference in total mass of the reactants and products by E=mc^2. Nuclear fusion powers the Sun and other stars. https://cdn.kastatic.org/ka-youtube-converted/b9qxAFLpz9U.mp4/b9qxAFLpz9U.mp4 825 Nuclear energy, mass-energy equivalence, and binding energy https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:nuclear-chemistry-hs/x2613d8165d88df5e:nuclear-fusion/e/understand-nuclear-fusion 2026-04-08T01:15:04.085520103Z Understand: nuclear fusion Check your understanding of nuclear fusion in this set of free practice questions. Allen Ruch exercise https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:nuclear-chemistry-hs/x2613d8165d88df5e:nuclear-fission/v/nuclear-fission 2024-06-13T01:38:36.313442654Z Nuclear fission During a nuclear fission reaction, a fissile nucleus absorbs a neutron and splits into two smaller nuclei. One or more free neutrons are also released. If enough fissile nuclei are located close enough together, the neutrons released from one fission can induce further fissions, resulting in a chain reaction. Nuclear weapons utilize fast, uncontrolled chain reactions to produce an explosion. Nuclear reactors utilize slower, controlled chain reactions to generate electricity. The release of energy during fission relates to the difference in total mass of the reactants and products by E=mc^2. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/e7bcc5ce-e9e9-4231-9efc-c5ac0aea612f_1280_720_base.png Nuclear fission During a nuclear fission reaction, a fissile nucleus absorbs a neutron and splits into two smaller nuclei. One or more free neutrons are also released. If enough fissile nuclei are located close enough together, the neutrons released from one fission can induce further fissions, resulting in a chain reaction. Nuclear weapons utilize fast, uncontrolled chain reactions to produce an explosion. Nuclear reactors utilize slower, controlled chain reactions to generate electricity. The release of energy during fission relates to the difference in total mass of the reactants and products by E=mc^2. https://cdn.kastatic.org/ka-youtube-converted/5jDFqpoTgDo.mp4/5jDFqpoTgDo.mp4 627 Nuclear energy, mass-energy equivalence, and binding energy https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:nuclear-chemistry-hs/x2613d8165d88df5e:nuclear-fission/e/understand-nuclear-fission 2025-05-15T18:51:42.970364319Z Understand: nuclear fission Check your understanding of nuclear fission in this set of free practice questions. Allen Ruch exercise https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:nuclear-chemistry-hs/x2613d8165d88df5e:nuclear-fission/e/apply-nuclear-fission 2026-03-26T05:20:35.16058035Z Apply: nuclear fission Apply your understanding of fission reactions in this set of free practice questions. Allen Ruch exercise