Campbell Essential Biology (7th Edition)
7th Edition
ISBN: 9780134765037
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 4SQ
Why are radioactive isotopes useful to tracers in research on the chemistry of life?
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What does it mean to say that a substance is radioactive?
why is chemistry important in studying biology?
Many radioactive isotopes are used in medicine for imaging and treatment purposes. The specific isotopes used depends on the particular organ or body system being studied (for example, Xe-133 is used to image lung function and blood flow.) Technetium-99m is a common radioactive isotope using for a variety of medical applications. It is produced from the decay of Molybdenum-99 and has a half-life of 6.01 hours.
What are some of the applications of Tc-99m?
While harder to access, another radioactive isotope of technetium, Tc-93, has a half-life of 2.73 hours. If it were easier to harvest, would this be a good substitute for Tc-99m? (remember to explain why for full credit)
While Tc-99m has a half-life of 6.01 hours, its decay product has a half-life of 213,000 years. While the medical community considers it to be reasonably safe, within the limits of testing, does this make sense considering both chemical and biological principles?
What are possible ways that you might deal with or…
Chapter 2 Solutions
Campbell Essential Biology (7th Edition)
Ch. 2 - An atom can be changed into an ion by adding or...Ch. 2 - If you change the number of _____ the atom becomes...Ch. 2 - A nitrogen atom has 7 protons, and the most common...Ch. 2 - Why are radioactive isotopes useful to tracers in...Ch. 2 - What is chemically nonsensical about this...Ch. 2 - Why is it unlikely that two neighboring water...Ch. 2 - Which of the following is not a chemical reaction?...Ch. 2 - Some people in your study group say they dont...Ch. 2 - Explain how the unique properties of water result...Ch. 2 - Explain why it is unlikely that life could exist...
Ch. 2 - A can of cola consists mostly of sugar dissolved...Ch. 2 - For each statement, identify which major theme is...Ch. 2 - For each statement, identify which major theme is...Ch. 2 - For each statement, identify which major theme is...Ch. 2 - Animals obtain energy through a series of chemical...Ch. 2 - Interpreting Data. As shown in Figure 2.17,...Ch. 2 - Critically evaluate this statement: Its paranoid...Ch. 2 - A major source of the CO2 that causes ocean...
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- The decay of an isotope element follows a first-order reaction. Assuming that you start with 964 mg of the isotope element sample, after 39.4 hours of decay, you find that there is 275 mg of the sample remaining. What is the half-life time of this reaction?arrow_forwardwhat makes Isotopes of an element different from one another?arrow_forwardWhat enables a radioisotope to substitute for an ordinary (nonradioactive) atom of the same element molecule?arrow_forward
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