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1 | |
A radioisotope decays to give an alpha particle and Th-234. What was the original element?
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| | A) | Pa
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| | B) | Bi
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| | C) | U
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| | D) | Ra
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| | E) | Rn
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2 | |
When Pb-210 decays by emission of a b
particle, what isotope is formed?
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| | A) | Bi-209
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| | B) | Bi-210
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| | C) | Pb-209
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| | D) | Tl-210
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| | E) | Tl-209
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3 | |
The nuclide copper-64 decays by emission of a positron. What is the product nuclide?
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| | A) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072396814/37547/Image14.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | B) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072396814/37547/Image15.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | C) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072396814/37547/Image16.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | D) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072396814/37547/Image17.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | E) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072396814/37547/Image18.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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4 | |
Given that potassium-39 is a stable nuclide, what type of particle would you expect to be emitted when potassium-42 decays?
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| | A) | proton
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| | B) | neutron
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| | C) | beta particle
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| | D) | positron
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| | E) | alpha particle
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5 | |
What fraction of radioactive atoms remains in a sample after three half-lives?
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| | A) | 1/4
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| | B) | 1/5
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| | C) | 1/6
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| | D) | 1/8
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| | E) | none of the above
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6 | |
What is the specific activity (in Ci/g) of radioactive sample if 4.56 mg emits 2.27 ´
108 b
particles per second? |
| | A) | 4.97 Ci/g |
| | B) | 0.135 Ci/g |
| | C) | 1.35 Ci/g |
| | D) | 0.00133 Ci/g |
| | E) | none of the above |
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7 | |
Tritium (hydrogen-3) is a naturally-occurring isotope, present in water, and has a half-life of 12.3 years. A bottle of aged red wine has a tritium activity which is three-quarters as great as in newly-bottled wine. Estimate or calculate the age of the wine.
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| | A) | 16.4 years
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| | B) | 9.3 years
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| | C) | 8.9 years
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| | D) | 5.1 years
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| | E) | 3.1 years
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8 | |
When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an isotope of phosphorus are produced. What is the mass number of the isotope?
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| | A) | 28
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| | B) | 29
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| | C) | 30
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| | D) | 31
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| | E) | 32
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9 | |
Gamma-rays and X-rays interact with matter, causing
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| | A) | formation of ions, but no free radicals.
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| | B) | formation of free radicals, but no ions.
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| | C) | nuclear transmutation reactions.
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| | D) | formation of ions and free radicals.
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| | E) | formation of ions and nuclear transmutation reactions.
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10 | |
For the average person, what is the source of the greatest amount of radiation per year?
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| | A) | radiation from the air, especially radon gas
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| | B) | medical and dental X-rays
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| | C) | cosmic rays
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| | D) | potassium-40 in the body
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| | E) | nuclear power plants and their spent fuel
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11 | |
Considering the most stable isotope of each of the following elements, predict which one has the highest binding energy per nucleon.
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| | A) | hydrogen
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| | B) | beryllium
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| | C) | lithium
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| | D) | uranium
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| | E) | cobalt
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12 | |
The atomic mass of manganese-55 is 54.938 amu. Use data from your textbook to determine the total binding energy of this nuclide, in J/atom.
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| | A) | 2.58 ´
10-19 J
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| | B) | 4.65 ´
1016 J
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| | C) | 1.33 ´
10-19 J
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| | D) | 7.74 ´
10-11 J
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| | E) | None of the above
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13 | |
Which of the following cannot be an example of nuclear fusion?
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| | A) | A nuclear reaction in which two reactants have greater binding energy than their fused product.
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| | B) | A nuclear reaction in which a carbon nucleus is produced.
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| | C) | The primary energy-producing reaction in the Sun.
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| | D) | The primary energy-producing reaction in a hydrogen bomb.
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| | E) | A reaction in which the reactants are less stable than the products.
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14 | |
A typical neutron-initiated fission of U-235 yields Mo-97, two neutrons, and another element. What is this second element?
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| | A) | In
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| | B) | Te
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| | C) | Sn
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| | D) | Sb
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| | E) | La
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15 | |
Which of the following are present in a nuclear reactor in order to slow the rate of the chain reaction?
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| | A) | reflectors
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| | B) | control rods
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| | C) | moderators
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| | D) | heavy water
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| | E) | zirconium
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