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Unformatted text preview: 12) If a sample of iodine131 decays from 60 mg to 7.5 mg in 24 day, what is its half life? 13) How long will it take a 1.28 gram sample of polonium208 to decay to a mass of 0.160 grams assuming the halflife of polonium208 is 2.898 years? 14) A sample of bone contains 3 mg of carbon14. An equally massive bone of the same animal species would contain 96 mg of carbon14 in a fresh carcass. How old is the bone sample assuming the halflife of carbon14 is 5730 years. 15) Place the following three forms of radiation in order of their minimum shielding requirements (least to greatest). Alpha, beta, gamma. 16) List three uses of radioactive materials. 17) What is the difference between nuclear fission and nuclear fusion. 18) Explain why nuclear fission is used to generate power in power plants and nuclear fusion is not. Unit 7 homework...
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This note was uploaded on 09/23/2009 for the course CHEM 120 taught by Professor Johnmichael during the Spring '09 term at Tennessee Martin.
 Spring '09
 johnmichael
 Chemistry, Proton, pH

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