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  1. Radioactive decay - Wikipedia

    Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation.

  2. Radioactivity | Definition, Types, Applications, & Facts | Britannica

    Feb 26, 2026 · radioactivity, property exhibited by certain types of matter of emitting energy and subatomic particles spontaneously. It is, in essence, an attribute of individual atomic nuclei.

  3. Radioactive Emergency (TV Mini Series 2026) - IMDb

    Radioactive Emergency: Created by Gustavo Lipsztein. With Johnny Massaro, Paulo Gorgulho, Bukassa Kabengele, Tuca Andrada. In 1987 Brazil, scavengers discover a mysterious glowing …

  4. What Is Radioactivity? - Energy.gov

    As its name implies, radioactivity is the act of emitting radiation spontaneously. This is done by an atomic nucleus that, for some reason, is unstable; it "wants" to give up some energy in order to shift …

  5. RADIOACTIVE Definition & Meaning - Merriam-Webster

    The meaning of RADIOACTIVE is of, caused by, or exhibiting radioactivity. How to use radioactive in a sentence.

  6. Radioactivity: Definition, Types, Formula, and Applications

    Jun 10, 2025 · Radioactivity occurs when an atom has an excess of energy, mass, or both, making its nucleus unstable. To reach a lower, more stable energy level, it releases energy in the form of …

  7. What Is Radioactivity: Simple Definition, Explanation And Examples

    Jun 2, 2024 · What Exactly Is Radioactivity ? Radioactive decay is a nucleus’ journey to attaining stability via emission of highly energetic radiation and subatomic particles. This phenomenon is …

  8. DOE Explains...Radioactivity | Department of Energy

    Radioactivity is the release of energy from the decay of the nuclei of certain kinds of atoms and isotopes. Atomic nuclei consist of protons and neutrons bound together in tiny bundles at the center of atoms.

  9. Watch Radioactive Emergency | Netflix Official Site

    Physicists and doctors race to contain a massive radiological disaster and save thousands of lives in this drama series inspired by true events.