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Balance the equation Balance the equation . .

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On a plot of the number of neutrons versus the number of protons, a nucleus of aluminum-28 lies above the belt of stability. Write an equation for radioactive decay of aluminum-28.

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Protactinium-234 has a half-life of 1 minute. How much of a 400. g sample protactinium would remain after 4 minutes?

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Cobalt-60 is a beta emitter with a half-life of 5.3 years. Approximately what fraction of the cobalt-60 atoms in a particular sample will remain after 32 years?


A) 1/6
B) 1/8
C) 1/16
D) 1/32
E) 1/64

F) C) and E)
G) D) and E)

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The mass of a nucleus is always less than the sum of the masses of the nucleons.

A) True
B) False

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Which is the most penetrating of the three types of nuclear radiation?


A) alpha
B) beta
C) gamma

D) All of the above
E) B) and C)

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What element is the stable end-product of the uranium radioactive decay series?


A) Th
B) Pu
C) Ra
D) Au
E) Pb

F) A) and B)
G) B) and C)

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In the In the decay series there are six radioisotopes that decay by alpha emission, including Th-232 itself, and four radioisotopes that decay by beta emission. The final product of this series is a stable isotope. The symbol for this product is A) . B) . C) . D) . E) . decay series there are six radioisotopes that decay by alpha emission, including Th-232 itself, and four radioisotopes that decay by beta emission. The final product of this series is a stable isotope. The symbol for this product is


A) In the decay series there are six radioisotopes that decay by alpha emission, including Th-232 itself, and four radioisotopes that decay by beta emission. The final product of this series is a stable isotope. The symbol for this product is A) . B) . C) . D) . E) . .
B) In the decay series there are six radioisotopes that decay by alpha emission, including Th-232 itself, and four radioisotopes that decay by beta emission. The final product of this series is a stable isotope. The symbol for this product is A) . B) . C) . D) . E) . .
C) In the decay series there are six radioisotopes that decay by alpha emission, including Th-232 itself, and four radioisotopes that decay by beta emission. The final product of this series is a stable isotope. The symbol for this product is A) . B) . C) . D) . E) . .
D) In the decay series there are six radioisotopes that decay by alpha emission, including Th-232 itself, and four radioisotopes that decay by beta emission. The final product of this series is a stable isotope. The symbol for this product is A) . B) . C) . D) . E) . .
E) In the decay series there are six radioisotopes that decay by alpha emission, including Th-232 itself, and four radioisotopes that decay by beta emission. The final product of this series is a stable isotope. The symbol for this product is A) . B) . C) . D) . E) . .

F) B) and D)
G) A) and E)

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How old is a bottle of wine if the tritium (3H) content is 25% that of a new wine? The half-life of tritium is 12.5 years.


A) 0.25 yr
B) 3.1 yr
C) 25 yr
D) 38 yr
E) 50. yr

F) A) and D)
G) C) and D)

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Beta particles are identical to


A) protons.
B) helium atoms.
C) hydrogen atoms.
D) helium nuclei.
E) electrons.

F) B) and D)
G) C) and E)

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What is the missing symbol in this plutonium fission reaction? What is the missing symbol in this plutonium fission reaction? A) B) C) D) E)


A) What is the missing symbol in this plutonium fission reaction? A) B) C) D) E)
B) What is the missing symbol in this plutonium fission reaction? A) B) C) D) E)
C) What is the missing symbol in this plutonium fission reaction? A) B) C) D) E)
D) What is the missing symbol in this plutonium fission reaction? A) B) C) D) E)
E) What is the missing symbol in this plutonium fission reaction? A) B) C) D) E)

F) A) and B)
G) None of the above

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If 12% of a certain radioisotope decays in 5.2 years, what is the half-life of this isotope?


A) 0.59 yr
B) 1.7 yr
C) 22 yr
D) 28 yr
E) 32 yr

F) A) and C)
G) C) and D)

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Which isotope, when bombarded with oxygen-18, yields the artificial isotope seaborgium-263 plus 4 neutrons?


A) nobelium-245
B) radium-259
C) californium-245
D) nobelium-249
E) californium-249

F) B) and D)
G) None of the above

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What role does cadmium metal (Cd) play in a nuclear reactor?


A) slows down the fission neutrons (moderator)
B) transfers heat from the reactor to the heat exchanger (primary coolant)
C) controls chain reaction (control rods)
D) transfers heat from the condenser to the environment (cooling tower)
E) undergoes fission (fuel rods)

F) C) and E)
G) A) and B)

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Complete and balance the nuclear equation Complete and balance the nuclear equation . .

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The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes. Write a balanced nuclear reaction for this process.

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Which isotope, when bombarded with nitrogen-15, yields the artificial isotope dubnium-260 plus 4 neutrons?


A) californium-245
B) thorium-257
C) nobelium-245
D) californium-249
E) dubnium-249

F) A) and D)
G) A) and C)

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Complete and balance the nuclear equation Complete and balance the nuclear equation . .

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Which of the following is an advantage of nuclear power plants over coal-burning plants? Nuclear power plants


A) produce radioactive byproducts with very short half-lives, reducing the need for waste storage.
B) do not pollute the air with SO2, soot, and fly-ash.
C) create no thermal pollution.
D) generate radioactive byproducts that can be sold for use in secondary applications.

E) A) and B)
F) All of the above

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The 14C activity of some ancient Peruvian corn was found to be 10 disintegrations per minute per gram of carbon. If present-day plant life shows 15 dpm/g, how old is the Peruvian corn? The half-life of 14C is 5730 yr.


A) 1,455 yr
B) 1,910 yr
C) 3,350 yr
D) 3,820 yr
E) 9,080 yr

F) A) and C)
G) A) and E)

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