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Unformatted text preview: B rad Deitemeyer C H M 1046: Ext ra Credit for Exam 1 Read Sections 19.1 and 19.3 from your Zumdahl textbook (18.1 and 18.3 if you have an earlier edition of the textbook) then answer the questions below:
1. In the following nuclear equations, identify the missing product:
238 92 U 4He +
2 234 90 Th 235 92 U + 1n 0 139 I + 2 1n +
0 95 Y 53 39 2. Electron capture t ransforms 40K into what nuclide? 40Ar
19 18 3. Which nuclear process(es) decrease the atomic number by 1? Positron production, E lectron capture 4. What is the “zone of stability”? t he ratio between neutrons and protons where n uclides do not undergo radioactive decay
a. How are nuclides with too many neutrons most likely to decay? β− particle p roduction
b. How are nuclides with too few neutrons most likely to decay? Positron production 5. Breeder reactors are used to convert the nonfissionable nuclide 238U to a fissionable p roduct.
92 Neut ron capture of the f issionable
92 238 U is followed by 2 successive beta decays. What is the final product? 238Pu
94 6. When the U-235 nucleus is struck with a neutron, the Zn-72 and Sm-160 nuclei are p roduced along with some neutrons. How many neutrons are emitted? 4 ...
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This note was uploaded on 04/04/2011 for the course CHM 1046 taught by Professor Wolfe,d during the Spring '08 term at Hillsborough.
- Spring '08