This is the name of the process by which a large

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This is the name of the process by which a large nucleus splits into two smaller fragments. Fission 800 This is the amount of a 100-g sample that remains after 3 half-lives. 12.5 g 1000 This is the number of half-lives required for 15/16 of a radioactive sample to decay. 4 Nuclear Energy 200 This is the percentage of nuclear power plants based on nuclear fusion world- wide. 0 400 Of H, Fe and U, the nucleus that has the lowest average mass per nucleon and is most stable. Fe 600 This is the process in which the fissioning of one nucleus leads to additional fission reactions. Chain Reaction 800 This is the minimum amount of fissionable material needed to sustain a chain reaction. Critical Mass 1000 This is converted to energy during all nuclear reactions. Mass Exposure & Medicine 200 Of 20%, 80%, and 100%, the percentage that represents the amount of radiation exposure due to natural sources. 80% 400 Of the following, the one used to measure radiation: PET Scan, Decay Series, Geiger Counter Geiger Counter 600 The name of a radioisotope used to follow the progress of a chemical or biological process. Radiotracer 800 Of 50-100, 300-400, or 1000-2000 mrem, the approximate average yearly exposure of US residents to radiation. 300-400 mrem 1000 This is the term for any radiation energetic enough to strip electrons from atoms. Ionizing Radiation Potpourri 200 This was the original method that radiation was detected and discovered. Film 400 This material was used in the first controlled fission reaction to moderate the neutrons. Graphite 600 This isotope is the result of α decay of Rn-222. Po-218 800 This is a device used by scientists to monitor their monthly exposure to radiation. Film Badge 1000 What is the product of the following nuclear reaction: 95 241 Am + 2 4 He 2 0 1 n + ? 97 243 Bk Final Jeopardy Category: Half-Life Calculations If 1.0 mg of a radioactive isotope is left after 4 half-lives have passed, how much of the isotope was originally present? Answer: 16 mg Note: “bombardment” is also an acceptable answer
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