WA10_CHE-121-mar14 - Thomas Edison State College General...

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Thomas Edison State College General Chemistry I with Labs (CHE-121) Section no.: OL009 Semester and year: May Term Written Assignment 10: Nuclear Reactions Answer all assigned questions and problems, and show all work. 1. How do nuclear reactions differ from ordinary chemical reactions? (3 points) Nuclear reactions differ from ordinary chemical reactions in that elements change into different or new elements rather than remain in their current state. (Reference: Chang 19.1) 2. What is the difference between radioactive decay and nuclear transmutation? (3 points) Nuclear transmutation occurs when nuclei are bombarded by particles or neutrons while radioactive decay is the rapid breakdown of radioactive materials while producing ionizing radiation. (Reference: Chang 19.35) 3. The table below is a summary of different modes of nuclear decay. Fill in the changes in atomic number ( Z ), number of neutrons ( N ), and mass number ( A ) in each case. Use “+” sign for increase, “–“ sign for decrease, and “0” for no change. Provide the symbol for each elementary particle involved in the decay process. (12 points) Decay Mode Particle Symbol Change in: Change in: Change in: Z N A Alpha decay a - + + Beta decay B + + +- Positron decay e+ + - + 1 Copyright © 2014 by Thomas Edison State College. All rights reserved.
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Electron capture B + - 0 (Reference: Chang 19.6) 4. Complete the following nuclear equations, and identify X in each case.
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