Physics 30 Dec 2000 Diploma Exam

00 h and decays to a stable isotope by gamma ray

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Unformatted text preview: ll be present in a patient’s system 24.0 h after injection is A. B. C. D. 29. 12.5% 6.25% 2.00% 0.841% A photon of gamma radiation emitted by the radioactive decay of technetium-99 has an energy of 3.85 MeV. This radiation has a wavelength of A. 5.17 × 10–26 m B. 3.23 × 10–13 m C. 3.10 × 1012 m D. 9.29 × 1020 m 18 30. Polonium has more isotopes than any other element, and they are all radioactive. The isotope 218 84 Po has A. B. 84 protons and 218 neutrons C. 134 protons and 84 neutrons D. 31. 218 protons and 84 neutrons 84 protons and 134 neutrons Nuclear radiation exists in several different forms. Listed from greatest to least in their ability to penetrate human tissue, the order of three of these forms is A. alpha, beta, gamma B. C. D. gamma, beta, alpha gamma, alpha, beta alpha, gamma, beta Use the following information to answer the next question. When a neutron is captured by a nucleus of uranium-238, the event shown below occurs. 238 92 U 1 + 0n → 239 92 U The uranium-239 then undergoes a series of decays: 239 92 U 32. decay I → 239 93Np decay II → In both decays I and II, the type of emitted particle is A. B. C. D. an alpha particle an electron a neutron a proton 19 239 94 Pu 33. When white light passes through a cool gas and then into a spectroscope, the spectrum produced is A. B. C. D. a continuous spectrum an absorption spectrum a bright-line spectrum an emission spectrum Use the following information to answer the next three questions. In 1939, four German scientists, Otto Hahn, Lise Meitner, Fritz Strassmann, and Otto Frisch, made an important discovery that ushered in the atomic age. They found that a uranium nucleus, after absorbing a neutron, splits into two fragments that each have a smaller mass than the original nucleus. This process is known as nuclear fission. There are many possible fission reactions that can occur, two of which are shown below. I + 235 92 U → 236 92 U → 141 56Ba + 92 36 Kr + 3 1 n + energy 0 II 34. 1 0n 1 0n + 235 92U → 236 92 U → 140 54Xe + 92 38Sr + x 1 n + energy 0 The value of x in reaction II is A. B. C. D. 4 3 2 1 20 Use the following additional information to answer the next two questions. The measurements given below indicate that the uranium-235 nucleus has a smaller mass than the mass of a corresponding number of free protons and neutrons. This difference in mass is called the mass defect. Einstein’s concept of mass-energy equivalence, E = mc2, can be used to predict the energy that binds a nucleus together by using the mass defect. mass of uranium-235 nucleus = 3.9021 × 10–25 kg mass of proton = 1.6726 × 10–27 kg mass of neutron = 1.6749 × 10–27 kg Numerical Response 10. The mass defect of uranium-235, expressed in scientific notation, is b × 10–w kg. The value of b is __________. (Record your three-digit answer in the numerical-response section on the answer sheet.) Use your answer for Numerical Response 10 to answer Numerical Response 11.* Numerical Response 11. The nuclear binding energy of u...
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This note was uploaded on 01/14/2014 for the course PHYSICS Physics 30 taught by Professor Quinlan during the Fall '09 term at Centennial High School.

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