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6) Cobalt-60 is a radioisotope used as a source of ionizing radiation in cancer treatment (The radiation it emits is effective in killing rapidly dividing cancer cells.). If a hospital starts with a 1,000 mg sample of Co-60, how many milligrams of the Co-60 would be left after 10 yrs? (Half-life of Co-60 is 5 years.) Show work in the box to the right.

6) Cobalt-60 is a radioisotope used as a source of ionizing radiation in cancer treatment (The radiation it emits is effective in killing rapidly dividing cancer cells.). If a hospital starts with a 1,000 mg sample of Co-60, how many milligrams of the Co-60 would be left after 10 yrs? (Half-life of Co-60 is 5 years.) Show work in the box to the right.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Please answer the 6 questions this is not an graded assignment so stop regarding it as it!!
Ri 7) Using your results from Trial #1 and Trial #2, find the average values of non-decayed and decayed atoms left after each. half-life. Show calculations and record values in the box to the right. 8) Complete the graph and post lab questions below. 130 (20 100 80 20 60 50 Author: Mr. Maystry 40- 30 20 128 10 Lab Partner: Half Life Nondeca yed Decayed O 1 128 56 069 34 30.5 13 5.5/3 2 38. 18 5 6 6) Cobalt-60 is a radioisotope used as a source of ionizing radiation in cancer treatment (The radiation it emits is effective in killing rapidly dividing cancer cells.). If a hospital starts with a 1,000 mg sample of Co-60, how many milligrams of the Co-60 would be left after 10 yrs? (Half-life of Co-60 is 5 years.) Show work in the box to the right. 7 2 3 4 5 6 7 Graphs: On the graph paper above, make two plots. First plot the average number of decayed pennies vs. the number of half-lives, then the average number of non-decayed pennies (remember-this is a running total) vs. the number of half-lives. Be sure to make the plots take up as much of the page as possible, label both axes, title the graph, and provide a legend. DO NOT CONNECT THE DATA POINTS. Instead, draw the best smooth curve through each data set. 5.5 31.52 Post Lab Questions: 1)Approximately what percentage of pennies "decayed" after each half-life? 2) After which half-life did the actual number of pennies decay the most?_ 3) In the simulation, you only dealt with 128 pennies, however in the "world of atoms," one is dealing with enormous numbers (moles!) of a radioactive substance. With so many atoms, statistically, you should get exactly half of the atoms decaying every half-life. Thus, in the "real world of atoms," what percentage of radioactive atoms remains after 5 half-lives go by? What percentage of atoms has decayed? Show all your work! 7-522-545 0.5 4) In the simulation, every time you shook the beaker represented one half-life. In your simulation, you made no distinction as to how long that half-life was. What could you do in the simulation to represent a radioactive substance that has a half-life of 2 minutes? How about one with a half-life of 10 minutes? HCHS Chemistry Laboratory Exercise #28: Simulating Nuclear Decay 5) In this simulation, the fact is that each penny has a 50% chance of landing tails-up (decayed). Thus, on average, 50% of the atoms will land tails-up each time you shake the beaker. a) Is there any way to predict if a particular penny will "decay" after one half life goes by? Explain Page 2 of 4
Transcribed Image Text:Ri 7) Using your results from Trial #1 and Trial #2, find the average values of non-decayed and decayed atoms left after each. half-life. Show calculations and record values in the box to the right. 8) Complete the graph and post lab questions below. 130 (20 100 80 20 60 50 Author: Mr. Maystry 40- 30 20 128 10 Lab Partner: Half Life Nondeca yed Decayed O 1 128 56 069 34 30.5 13 5.5/3 2 38. 18 5 6 6) Cobalt-60 is a radioisotope used as a source of ionizing radiation in cancer treatment (The radiation it emits is effective in killing rapidly dividing cancer cells.). If a hospital starts with a 1,000 mg sample of Co-60, how many milligrams of the Co-60 would be left after 10 yrs? (Half-life of Co-60 is 5 years.) Show work in the box to the right. 7 2 3 4 5 6 7 Graphs: On the graph paper above, make two plots. First plot the average number of decayed pennies vs. the number of half-lives, then the average number of non-decayed pennies (remember-this is a running total) vs. the number of half-lives. Be sure to make the plots take up as much of the page as possible, label both axes, title the graph, and provide a legend. DO NOT CONNECT THE DATA POINTS. Instead, draw the best smooth curve through each data set. 5.5 31.52 Post Lab Questions: 1)Approximately what percentage of pennies "decayed" after each half-life? 2) After which half-life did the actual number of pennies decay the most?_ 3) In the simulation, you only dealt with 128 pennies, however in the "world of atoms," one is dealing with enormous numbers (moles!) of a radioactive substance. With so many atoms, statistically, you should get exactly half of the atoms decaying every half-life. Thus, in the "real world of atoms," what percentage of radioactive atoms remains after 5 half-lives go by? What percentage of atoms has decayed? Show all your work! 7-522-545 0.5 4) In the simulation, every time you shook the beaker represented one half-life. In your simulation, you made no distinction as to how long that half-life was. What could you do in the simulation to represent a radioactive substance that has a half-life of 2 minutes? How about one with a half-life of 10 minutes? HCHS Chemistry Laboratory Exercise #28: Simulating Nuclear Decay 5) In this simulation, the fact is that each penny has a 50% chance of landing tails-up (decayed). Thus, on average, 50% of the atoms will land tails-up each time you shake the beaker. a) Is there any way to predict if a particular penny will "decay" after one half life goes by? Explain Page 2 of 4
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