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Unformatted text preview: addition to the questions in this practice quiz. Make sure that you do all of the medically related Chemical Connections homework questions that have been assigned and that you review the recitation practice material. Each question is worth 2.5 points each. All work for all problems must be shown. Include proper units for each calculation. 1. A 30 mg sample of a radioactive substance has a half life of 2.4 days. How long will it take for the radioactive sample to have a mass of 3.75 mg? 2. How does distance affect the intensity of radiation? 3. What type of metal shield is commonly used in hospitals to protect against radiation exposure? 4. Which radioactive isotope(s) are used for pancreas scans?...
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- Fall '09