Chapter 21 - Nuclear Chemistry,Radioactivity, andNuclear Energy

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11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 1/15 Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy Due Nov 20 at 11:59pm Points 25 Questions 25 Available Aug 29 at 12am - Dec 4 at 11:59pm Time Limit None Allowed Attempts 2 Instructions Attempt History Attempt Time Score LATEST Attempt 1 3,790 minutes 24 out of 25 Instructions: 1. You have two attempts for this assignment. Canvas will keep the highest score. 2. You should take screenshots of all the questions (and answers) after each attempt. You are only allowed to see the questions and answers ONCE (after each attempt). 3. You are only allowed to see your score ONCE after each attempt. You cannot see the answers to questions that are marked incorrectly. You can only see which questions are marked wrong. 4. This assignment may contain some embedded images. If you cannot see the images. it is most likely because you are using an Apple, Mac, or iPad. Canvas is designed to be compatible with Google Chrome. Do not use Safari. If you have an Apple, Mac, or iPad, try installing Google Chrome and using that browser (not Safari). Also. try moving your mouse cursor over the "missing" images. Then, "right click" with your mouse. Then, select "View", "Download", or "Save As". Many students said that would work. 5. If the due date has already past for this assignment, you are still allowed to go ahead and do the assignment. Just know that you are allowed to be late for only TWO Homework assignments for the entire semester. So, you can submit TWO late Homework assignments without any late penalty. After TWO late homework assignments, all other late Homework assignments will receive a ZERO. The very last date to submit late Homework assignments (up to two late assignments only) is December 4, 2022 (11:59 PM). Take the Quiz Again
11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 2/15 Correct answers are hidden. Score for this attempt: 24 out of 25 Submitted Nov 20 at 10:31am This attempt took 3,790 minutes. 1 / 1 pts Question 1 Identify the scientist(s) that were awarded the Nobel Prize in physics for the discovery of radioactivity in 1903. Antoine-Henri Becquerel, Marie Curie, Pierre Curie Albert Einstein Ernest Rutherford, Johannes Geiger Galileo Galilei Johannes Geiger, Marie Curie 1 / 1 pts Question 2 Which of the following statements is TRUE? All of the above are true. An alpha particle is a helium 2+ ion. Beta decay occurs when a neutron changes into a proton while emitting an electron. A positron is the antiparticle of the electron.
11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 3/15 Positrons are similar in ionizing power and penetrating power to beta particles. 1 / 1 pts Question 3 Write a nuclear equation for the alpha decay of Am. Am → He + Bk Am → He + Np Am → e + Pu Am → e + Cm Am → n + Am 1 / 1 pts Question 4 Determine the identity of the daughter nuclide from the alpha decay of Rn. Po Rn
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11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 4/15 At Ra Th 1 / 1 pts Question 5 Determine the identity of the daughter nuclide from the beta decay of Sr. Kr Y Se Sr Y 1 / 1 pts Question 6 Determine the identity of the daughter nuclide from the positron emission of C.
11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 5/15 B N B N C 1 / 1 pts Question 7 Determine the identity of the daughter nuclide from the electron capture by Rb. Y Kr Br Sr Kr 1 / 1 pts Question 8
11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 6/15 The following reaction represents what nuclear process? Cs + e → Xe alpha capture gamma emission electron capture positron emission beta emission 1 / 1 pts Question 9 Identify the missing particle in the following nuclear equation: Pb → e + ? Pb Tl Bi Pb Tl
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11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 7/15 1 / 1 pts Question 10 Which of the following statements is TRUE? If N/Z ratio is too low, there are too many neutrons and the nuclide will undergo beta decay. If N/Z ratio is too high, there are too many protons and the nuclide will undergo positron emission or electron capture. The valley of stability is the geographic location where many of the known nuclides were first discovered. If N/Z ratio lies somewhere below 1, the nuclide is stable. None of the above are true. 1 / 1 pts Question 11 Nuclides above the valley of stability can become more stable through which of the following processes? positron emission gamma emission beta emission
11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 8/15 electron capture neutron bombardment 1 / 1 pts Question 12 Which of the following nuclides are most likely to decay via beta decay? Pb-206 F-18 Zr-90 Ar-40 I-131 1 / 1 pts Question 13 Which of the following nuclides are most likely to decay via positron emission? K-42 Al-24 N-14 I-131 Cs-137
11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 9/15 1 / 1 pts Question 14 Identify the nuclide that has the longest half-life. Rn U Th C Th 1 / 1 pts Question 15 Identify the elements used in radiometric dating. potassium-40 to argon-40 none of the above carbon-14 to nitrogen-14 uranium-238 to lead-206 all of the above
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11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 10/15 1 / 1 pts Question 16 Fluorine-18 undergoes positron emission with a half-life of 1.10 x 10 minutes. If a patient is given a 248 mg dose for a PET scan, how long will it take for the amount of fluorine-18 to drop to 83 mg? (Assume that none of the fluorine is excreted from the body.) 2 1.32 × 10 minutes 2 3.00 × 10 minutes 2 2.11 × 10 minutes 2 1.74 × 10 minutes 2 99 minutes 1 / 1 pts Question 17 The nuclide As-76 has a half-life of 26.0 hours. If a sample of As-76 weighs 344 g, what mass of As-76 remains after 538 minutes? 437 g 251 g 271 g 67.8 g 144 g
11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 11/15 1 / 1 pts Question 18 A geological sample is found to have a Pb-206/U-238 mass ratio of 0.337/1.00. Assuming there was no Pb-206 present when the sample was formed, how old is it? The half-life of U-238 is 4.5 × 10 years. 9 7.1 × 10 years 9 2.4 × 10 years 10 2.1 × 10 years 9 1.4 × 10 years 10 7.3 × 10 years 11 1 / 1 pts Question 19 Write a nuclear equation to describe the spontaneous fission of Am to form I-134 and Mo-107. Determine how many neutrons are produced in the reaction. 4 2 0 3 1
11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 12/15 1 / 1 pts Question 20 Define mass defect. the difference in mass between a radioactive atom and a nonradioactive atom energy released in a radioactive reaction an atom with too many neutrons energy absorbed in a radioactive reaction the difference in mass between an atom and the sum of its separate components 1 / 1 pts Question 21 Calculate the mass defect in Mo-96 if the mass of a Mo-96 nucleus is 95.962 amu. The mass of a proton is 1.00728 amu and the mass of a neutron is 1.008665 amu. 0.197 amu 0.812 amu 0.212 amu 0.795 amu 0.188 amu
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11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 13/15 1 / 1 pts Question 22 Determine the binding energy of an O-16 nucleus. The O-16 nucleus has a mass of 15.9905 amu. A proton has a mass of 1.00728 amu, a neutron has a mass of 1.008665 amu, and 1 amu is equivalent to 931 MeV of energy. 128 MeV 78.1 MeV 8.84 MeV 38.2 MeV 138 MeV 1 / 1 pts Question 23 The following reaction represents what nuclear process? H + H → He + n neutron capture alpha emission beta emission nuclear fission
11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 14/15 nuclear fusion 1 / 1 pts Question 24 Identify the highest natural radiation. terrestrial radiation radon gas natural radionuclides in the body cosmic radiation from outer space a five-hour jet airplane ride 0 / 1 pts Question 25 Incorrect Incorrect Identify the common radiotracers used in the diagnosis of medical problems all of the above iodine-131 iron-59 fluorine-18 thallium-201
11/20/22, 10:32 AM Chapter 21 - Nuclear Chemistry, Radioactivity, and Nuclear Energy: General Chemistry: 2022FA-CHEM-001B-202 https://sjeccd.instructure.com/courses/32359/quizzes/198732 15/15 Quiz Score: 24 out of 25
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