Chemistry
A_hme_d224
123.docx1. What is emitted from a nucleus if beta particle emission occurs?
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an electron |
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the equivalent of a helium nucleus |
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high frequency energy |
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a neutron |
2. Which represents the units used to measure the ability of radiation to cause harm to living tissue?
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Rem |
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Temperature |
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Grams |
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Joules |
3. What types of forces exist between 2 neutrons in the nucleus?
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Electrical repulsion only |
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Electrical attraction and Strong nuclear force |
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Strong nuclear force only |
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Electrical repulsion and Strong nuclear force |
4. A neutron without an adjacent proton is _______. It decays to a proton by emitting _______.
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unstable, an electron |
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stable, a positive charge |
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stable, gamma radiation |
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unstable, an alpha particle |
5. If a substance has a half life of 3 days. How much of a 30 gram sample will remain as the original substance after 6 days?
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3.75 |
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10 |
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7.5 |
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5 |
6. How is a nuclear power plant similar to a conventional coal burning power plant in creating electricity?
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they both use heat to create steam, to turn a turbine |
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the processes in each plant are completely diffierent |
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they both use coal as a starting material |
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they both create electricity by beta emission |
7. What kind of containers are needed to confine a nuclear fusion reaction?
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glass containers |
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nonmaterial containers, such as a magnetic field |
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temperature resistant ceramic container |
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nonmetal containers |
8. In a year, which of the following sources, on average, provides the greatest source of radiation exposure to humans?
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diagnostic X-rays |
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air (radon-222) |
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cosmic radiation |
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weapons-test fallout |
9. Carbon-14 dating makes use of a radioactive isotope of carbon C-14, which has a half life of 5730 years. Which statement below is FALSE?
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A higher amount of C-14 with decay during the first-thousand years than during the second-thousand years |
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After 11460 years, all of the C-14 would have decayed |
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After 5730 years, half of the C-14 would have decayed |
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Carbon-14 dating is not useful for a sample estimated to be 1 million years old |
10. An isotope of thorium, Th-234, has 90 protons and 144 neutrons. If this nucleus emits an alpha particle, what is the the symbol for the new element created?
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Pa-232 |
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Ra-230 |
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Th-230 |
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Rn-232 |
