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May 9, 2024 · Radioactivity is the spontaneous emission of energy and subatomic particles by unstable atomic nuclei. Learn about the types of radioactivity (alpha, beta, gamma, etc.), their applications, and their rates of decay.
Oct 19, 2023 · Learn what radioactivity is, how it occurs, and what are its applications and dangers. Explore the different types of radioactive decay, the discovery of radioactivity by Marie Curie, and the nuclear energy phenomenon.
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Aug 23, 2023 · Radioactive Decay Series. The nuclei of all elements with atomic numbers greater than 83 are unstable. Thus all isotopes of all elements beyond bismuth in the periodic table are radioactive.
Learn what radioactivity is, how it is measured, and what types of radiation are emitted by unstable nuclei. Find out the history, sources, and applications of radioactivity in science and medicine.
In 1898 French physicists Pierre and Marie Curie discovered the strongly radioactive elements polonium and radium, which occur naturally in uranium minerals. Marie coined the term radioactivity for the spontaneous emission of ionizing, penetrating rays by certain atoms.
Radioactive Decay Law. When an individual nucleus transforms into another with the emission of radiation, the nucleus is said to decay. Radioactive decay occurs for all nuclei with Z > 82, Z > 82, and also for some unstable isotopes with Z < 83. Z < 83. The decay rate is proportional to the number of original (undecayed) nuclei N in a substance.
Sep 7, 2023 · Nuclear Science. How Nuclear Radiation Works. By: Marshall Brain & Desiree Bowie | Updated: Sep 7, 2023. A nuclear power plant accident could leak harmful radiation into the atmosphere. Pete Turner/Getty Images. You've probably heard people talk about radiation both in fiction and in real life.
