(a) For nuclides with atomic mass numbers larger than 60, what happens to theīinding energy per nucleon as the atomic mass number increases? How does this trend relate to the energy produced by fission? (b) Why do only very large nuclei undergo fission? 5. (a) What type of nuclear reaction is shown in the equation? (b) Complete the equation. Rubidium-90 atom and the cesium-144 atom. (c) Compare the mass of the uranium-235 nucleus to the combined mass of the (b) What type of nuclear reaction is this? Explain how you know. (a) Write an equation to represent this nuclear reaction. The collision results in one rubidium-90 atom, one cesium-144 atom, two neutrons, and thermal energy. In a certain nuclear reaction, a slow neutron collides with a uranium-235 atom. Include nuclearĮquations to show an example of each type of reaction. Compare and contrast fission reactions and fusion reactions. o Nuclear fusion is the joining together of light nuclei.Show your understanding of concepts related to fission and fusion.Īnswer the following questions on a separate page. What are some characteristics of the fission process? o Used for nuclear power o Produces lots of energy o Uranium (or something similar) is bombarded by a neutron to initiate a chain reaction.o Nuclear fission is the fragmenting of heavy nuclei. For example if you end with 5g after 4 half-lives:: ▪ 5 → 10 → 20 → 40 → 80g would have been what you started with 4 half lives ago Then multiply the ending amount by 2 that many times. How can you figure out the starting amount of a radioisotope given the ending amount after some time period and the length of one half-life? o Figure out how many half-lives have passed.For example if you start with 20g and 3 half lives passed then: ▪ 20 → 10 → 5 → 2 would be left after 3 half lives Then divide the starting amount by 2 that many times. How can you figure out the amount of a radioisotope left after a certain amount of time, given the length of one half-life? o Figure out how many half-lives have passed.o amount of time required for one-half of a radioactive sample to decay Worksheet 35 - KEY Half-Lives, Fission and Fusion
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