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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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What is the missing symbol in this plutonium fission reaction? What is the missing symbol in this plutonium fission reaction? Pu + n ______ + Sr + 3 n A) Ba B) \beta C) Xe D) Sr E) Ba Pu + What is the missing symbol in this plutonium fission reaction? Pu + n ______ + Sr + 3 n A) Ba B) \beta C) Xe D) Sr E) Ba n What is the missing symbol in this plutonium fission reaction? Pu + n ______ + Sr + 3 n A) Ba B) \beta C) Xe D) Sr E) Ba ______ + What is the missing symbol in this plutonium fission reaction? Pu + n ______ + Sr + 3 n A) Ba B) \beta C) Xe D) Sr E) Ba Sr + 3 What is the missing symbol in this plutonium fission reaction? Pu + n ______ + Sr + 3 n A) Ba B) \beta C) Xe D) Sr E) Ba n


A) What is the missing symbol in this plutonium fission reaction? Pu + n ______ + Sr + 3 n A) Ba B) \beta C) Xe D) Sr E) Ba Ba
B) What is the missing symbol in this plutonium fission reaction? Pu + n ______ + Sr + 3 n A) Ba B) \beta C) Xe D) Sr E) Ba β\beta
C) What is the missing symbol in this plutonium fission reaction? Pu + n ______ + Sr + 3 n A) Ba B) \beta C) Xe D) Sr E) Ba Xe
D) What is the missing symbol in this plutonium fission reaction? Pu + n ______ + Sr + 3 n A) Ba B) \beta C) Xe D) Sr E) Ba Sr
E) What is the missing symbol in this plutonium fission reaction? Pu + n ______ + Sr + 3 n A) Ba B) \beta C) Xe D) Sr E) Ba Ba

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

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A sample of a radioisotope shows an activity of 999 disintegrations per minute due to beta decay. If after 1.10 years the activity is 952 disintegrations per minute, what is the half-life of this radioisotope?


A) 4.38 ×\times 10-2 yr
B) 11.4 yr
C) 0.25 yr
D) 15.8 yr
E) 9.1 yr

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

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Estimate the age of a bottled wine that has a tritium, 3H, content 60% that of freshly bottled wine.Tritium decays by beta decay and has a half-life of 12.3 yr. Estimate the age of a bottled wine that has a tritium,<sub> </sub><sup>3</sup>H, content 60% that of freshly bottled wine.Tritium decays by beta decay and has a half-life of 12.3 yr. H He + A) 0.029 yr B) 7.4 yr C) 9.1 yr D) 16 yr E) 35 yr H Estimate the age of a bottled wine that has a tritium,<sub> </sub><sup>3</sup>H, content 60% that of freshly bottled wine.Tritium decays by beta decay and has a half-life of 12.3 yr. H He + A) 0.029 yr B) 7.4 yr C) 9.1 yr D) 16 yr E) 35 yr Estimate the age of a bottled wine that has a tritium,<sub> </sub><sup>3</sup>H, content 60% that of freshly bottled wine.Tritium decays by beta decay and has a half-life of 12.3 yr. H He + A) 0.029 yr B) 7.4 yr C) 9.1 yr D) 16 yr E) 35 yr He + Estimate the age of a bottled wine that has a tritium,<sub> </sub><sup>3</sup>H, content 60% that of freshly bottled wine.Tritium decays by beta decay and has a half-life of 12.3 yr. H He + A) 0.029 yr B) 7.4 yr C) 9.1 yr D) 16 yr E) 35 yr


A) 0.029 yr
B) 7.4 yr
C) 9.1 yr
D) 16 yr
E) 35 yr

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

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What nuclear fuel is produced in a breeder reactor?

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Calculate the energy released in joules when one mole of polonium-214 decays according to the equation Calculate the energy released in joules when one mole of polonium-214 decays according to the equation Po Pb + He. [Atomic masses: Pb-210 = 209.98284 amu, Po-214 = 213.99519 amu, He-4 = 4.00260 amu.] A) 8.78 \times 10<sup>14</sup> J/mol B) 7.2 \times 10<sup>14</sup> J/mol C) 8.78 \times 10<sup>11</sup> J/mol D) -9.75 \times 10<sup>-3</sup> J/mol E) 1.46 \times 10<sup>-9</sup> J/mol Po Calculate the energy released in joules when one mole of polonium-214 decays according to the equation Po Pb + He. [Atomic masses: Pb-210 = 209.98284 amu, Po-214 = 213.99519 amu, He-4 = 4.00260 amu.] A) 8.78 \times 10<sup>14</sup> J/mol B) 7.2 \times 10<sup>14</sup> J/mol C) 8.78 \times 10<sup>11</sup> J/mol D) -9.75 \times 10<sup>-3</sup> J/mol E) 1.46 \times 10<sup>-9</sup> J/mol Calculate the energy released in joules when one mole of polonium-214 decays according to the equation Po Pb + He. [Atomic masses: Pb-210 = 209.98284 amu, Po-214 = 213.99519 amu, He-4 = 4.00260 amu.] A) 8.78 \times 10<sup>14</sup> J/mol B) 7.2 \times 10<sup>14</sup> J/mol C) 8.78 \times 10<sup>11</sup> J/mol D) -9.75 \times 10<sup>-3</sup> J/mol E) 1.46 \times 10<sup>-9</sup> J/mol Pb + Calculate the energy released in joules when one mole of polonium-214 decays according to the equation Po Pb + He. [Atomic masses: Pb-210 = 209.98284 amu, Po-214 = 213.99519 amu, He-4 = 4.00260 amu.] A) 8.78 \times 10<sup>14</sup> J/mol B) 7.2 \times 10<sup>14</sup> J/mol C) 8.78 \times 10<sup>11</sup> J/mol D) -9.75 \times 10<sup>-3</sup> J/mol E) 1.46 \times 10<sup>-9</sup> J/mol He. [Atomic masses: Pb-210 = 209.98284 amu, Po-214 = 213.99519 amu, He-4 = 4.00260 amu.]


A) 8.78 ×\times 1014 J/mol
B) 7.2 ×\times 1014 J/mol
C) 8.78 ×\times 1011 J/mol
D) -9.75 ×\times 10-3 J/mol
E) 1.46 ×\times 10-9 J/mol

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

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On a neutron number versus proton number plot, the nucleus of oxygen-15 lies below the belt of stability. Write an equation for radioactive decay of oxygen-15.

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Decay of ruthenium-93 by positron emission yields


A) technetium-93.
B) molybdenum-89.
C) palladium-97.
D) rhenium-93.
E) ruthenium-92.

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

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What is the decay rate of a sample of a radioisotope that has an activity of 12 microcuries? [1 curie = 3.7 ×\times 1010 disintegrations/s]

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The half-life of 14C is 5,730 yr. Assuming some charcoal from a campfire 29,000 years old was found, what fraction of the original C-14 would remain today?


A) 3.0 ×\times 10-2
B) 0.197
C) 3.51
D) 33.3
E) None of these.

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

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Find the nuclear binding enrgy of uranium-234 (atomic mass = 234.040947 amu) in units of joules per nucleon.[Data: neutron mass = 1.674928 ×\times 10-24 g; proton mass = 1.672623 ×\times 10-24 g; electron mass = 9.109387 ×\times 10-28 g; NA = 6.0221367 ×\times 1023 /mol; c = 2.99792458 ×\times 108 m/s]


A) 2.97 ×\times 10-10 J/nucleon
B) 3.04 ×\times 10-10 J/nucleon
C) 1.30 ×\times 10-12 J/nucleon
D) 1.22 ×\times 10-12 J/nucleon
E) 1.27 ×\times 10-12 J/nucleon

F) All of the above
G) A) and D)

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When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced.What new isotope is also formed? When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced.What new isotope is also formed? He + Be n + _____ A) C B) Li C) Li D) B E) B He + When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced.What new isotope is also formed? He + Be n + _____ A) C B) Li C) Li D) B E) B Be When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced.What new isotope is also formed? He + Be n + _____ A) C B) Li C) Li D) B E) B When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced.What new isotope is also formed? He + Be n + _____ A) C B) Li C) Li D) B E) B n + _____


A) When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced.What new isotope is also formed? He + Be n + _____ A) C B) Li C) Li D) B E) B C
B) When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced.What new isotope is also formed? He + Be n + _____ A) C B) Li C) Li D) B E) B Li
C) When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced.What new isotope is also formed? He + Be n + _____ A) C B) Li C) Li D) B E) B Li
D) When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced.What new isotope is also formed? He + Be n + _____ A) C B) Li C) Li D) B E) B B
E) When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced.What new isotope is also formed? He + Be n + _____ A) C B) Li C) Li D) B E) B B

F) All of the above
G) D) and E)

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Balance the equation Balance the equation Th + ? . Th Balance the equation Th + ? . Balance the equation Th + ? . + ? .

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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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Compare nuclear reactions with chemical reactions in terms of the conservation of mass.

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As opposed to chemical reactio...

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

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Charcoal found under a stone at Stonehenge, England, has a carbon-14 activity that is 0.60 that of new wood.How old is the charcoal? (The half-life of carbon-14 is 5,730 years.)


A) Less than 5,730 yr
B) Between 5,730 and 11,460 yr
C) Between 11,460 and 17,190 yr
D) More than 17,190 yr

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

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The alpha particles emitted by radon-222 have an energy of 8.8 ×\times 10-13 J. If a 200.g Pb brick absorbs 1.0 ×\times 1010 alpha particles from radon decay, what dose in rads will the brick absorb?

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In the In the Th 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) W B) W C) Pb D) Pb E) Pt Th 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 Th 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) W B) W C) Pb D) Pb E) Pt W
B) In the Th 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) W B) W C) Pb D) Pb E) Pt W
C) In the Th 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) W B) W C) Pb D) Pb E) Pt Pb
D) In the Th 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) W B) W C) Pb D) Pb E) Pt Pb
E) In the Th 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) W B) W C) Pb D) Pb E) Pt Pt

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

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