Ch 4 Nuclear Reactions

Ch 4 Nuclear Reactions - 6. What is radiation sickness? Key...

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Chem 101 Dr. Nielson Practice Problems for Chapter 4 1. Balance the following nuclear reactions. a. 40 K ------> 40 Ca + _________ 19 20 b. 240 Am + __________ -------> 243 Bk + 1 n 95 97 0 c. 58 Fe + 1 n -------> _________ 26 0 2. Write a balanced nuclear reaction for the positron emission of Mg-23. 3. What are the characteristics of α -radiation? 4. A nurse locates the I-131 prescribed for measurement of thyroid activity and finds that it was produced 24 days ago. The half-life is 8 days. What percentage of I-131 is left in the sample? 5. The t 1/2 for Co-60 is 5.3 years. If you had a sample of Co-60 that weighed 1.2 g, how many years would it take for the sample to disintegrate to only 0.15 g of Co-60?
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Unformatted text preview: 6. What is radiation sickness? Key 1.a. e-1 b. 4 He 2 c. 59 Fe 26 2. 23 Mg ------> 23 Na + e 12 11 1 3. -radiation is characterized by a loss of 2 neutrons and 2 protons from the element. The radiation only travels a short distance and cannot penetrate skin. Each alpha particle becomes a helium atom when it gains 2 electrons from its surroundings. 4. 12.5% will remain after 3 half-lives 5. 16 years 6. Radiation sickness is the damage experienced by an organism when exposed to excessive amounts of radiation. Nausea and vomiting are symptoms that first appear....
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This note was uploaded on 03/08/2012 for the course CHEM 101 taught by Professor Anderson,w during the Fall '08 term at BYU.

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Ch 4 Nuclear Reactions - 6. What is radiation sickness? Key...

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