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  1. Nuclear fission - Wikipedia

    Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The fission process often produces gamma photons, and releases a very large amount of energy even by …

  2. Nuclear fission | Examples & Process | Britannica

    Mar 20, 2026 · Nuclear fission, subdivision of a heavy atomic nucleus, such as that of uranium or plutonium, into two fragments of roughly equal mass. The process is accompanied by the release of …

  3. DOE Explains...Nuclear Fission - Department of Energy

    Nuclear fission is the process where the nucleus of an atom splits into two or more smaller nuclei and other particles. These particles can include neutrons, alpha particles (helium nuclei), beta particles …

  4. Nuclear Fission Definition and Examples

    May 13, 2023 · Nuclear fission is a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into two or more smaller, lighter nuclei. This process often produces gamma …

  5. What is Nuclear Energy? The Science of Nuclear Power

    Nov 11, 2025 · Nuclear energy is a form of energy released from the nucleus, the core of atoms, made up of protons and neutrons. This source of energy can be produced in two ways: fission – when …

  6. The Fission Process – MIT Nuclear Reactor Laboratory

    When a U-235 nucleus absorbs an extra neutron, it quickly breaks into two parts. This process is known as fission (see diagram below). Each time a U-235 nucleus splits, it releases two or three neutrons. …

  7. What Is Nuclear Fission and How Does It Release Energy?

    Mar 10, 2026 · Learn how splitting atoms releases enormous energy, what fuels the chain reaction, and why fission plays a role in today’s electricity supply.

  8. Understand Nuclear Fission | Understand Energy Learning Hub

    Jul 30, 2025 · Nuclear fission occurs when a large atom is split into smaller atoms, producing lots of heat and radiation. Nuclear fusion occurs when two nuclei combine to form a single nucleus, releasing …

  9. Nuclear Fission and Fusion – How Nuclear Reactions Produce Energy

    Nuclear fission and nuclear fusion are reactions in which changes within the atomic nucleus release energy millions of times greater than typical chemical reactions.

  10. What Is Nuclear Fission? The Physics Behind Atomic Power

    May 25, 2025 · Nuclear fission is the process by which the nucleus of an atom splits into two or more smaller nuclei, accompanied by the release of a large amount of energy. This seemingly simple …