Question 1

The gamma ray emission from the decay of cobalt-60 is used in cancer therapies.Cobalt-60 decays by the emission of two gamma rays followed by beta emission.What is the final product of this decay process?

Accepted Answer

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

Question 2

When a neutron in the nucleus is converted to a proton,which of the following is emitted?

Accepted Answer

A)  positron
B)  beta particle
C)  alpha particle
D)  deuteron
E)  neutronF) B) and E)
G) A) and B)

Question 3

A sample of wood from an Egyptian mummy case gives a  count of 8.5 cpm/gC (counts per minute per gram of carbon) .How old is the wood? (The initial decay rate of 
Is 15.3 cpm/g C,and its half-life is 5730 years.)

Accepted Answer

A)    years
B)    years
C)    years
D)    years
E)  none of theseF) A) and B)
G) All of the above

Question 4

Which of the following is the most likely mode of decay for the radioactive nuclide  ?

Accepted Answer

A)  positron emission
B)  gamma radiation
C)  beta emission
D)  alpha emission
E)  neutron emissionF) C) and D)
G) All of the above

Question 5

Consider a certain type of nucleus that has a rate constant of 2.43 × 10-2 min-1.Calculate the time required for the sample to decay to one-fourth of its initial value.

Accepted Answer

A)  28.5 min
B)  35.6 min
C)  0.0486 min
D)  57.0 min
E)  2.43 minF) B) and D)
G) C) and D)

Question 6

Which of the following statements is(are) true for the fission of uranium-235?

Accepted Answer

A)  The electron is captured by the nucleus,which becomes unstable.
B)  The nuclides produced are more stable than the uranium nuclide.
C)  The nuclides produced are individually heavier than the uranium nuclide.
D)  The products include neutrons.
E)  Two of these statements are true.F) All of the above
G) A) and B)

Question 7

Iodine-131,which is used to treat thyroid cancer,has a half-life of 8.04 days.How much time is required for 68% of the isotope to decay?

Accepted Answer

A)  13 days
B)  7 days
C)  43 days
D)  53 days
E)  4 daysF) B) and D)
G) All of the above

Question 8

Which of the following nuclides will produce 233Pa upon undergoing alpha decay?

Accepted Answer

A)  (234Pa) 
B)  (233U) 
C)  (229Ra) 
D)  (237Np) 
E)  (233Th) F) B) and E)
G) All of the above

Question 9

The isotope 210Pb has a half-life of 22 years.What percentage of a pure 210Pb sample prepared in April 1937 remains in April 1994?

Accepted Answer

A)  17%
B)  26%
C)  31%
D)  21%
E)  38%F) A) and D)
G) A) and C)

Question 10

Metastable isotopes,such as Technetium-99m and those produced from neutron activation analysis decay by what process?

Accepted Answer

A)  gamma emission
B)  alpha emission
C)  beta emission
D)  positron emission
E)  all of the aboveF) C) and E)
G) C) and D)

Question 11

What is the decay constant for a particular radioactive element that has a half-life of 5.66 years?

Accepted Answer

A)  0.161/year
B)  0.113/year
C)  7.18 × 10-3/h
D)  25.8/s
E)  0.122/yearF) A) and B)
G) A) and E)

Question 12

Which of the following statements about 248Bk is incorrect?

Accepted Answer

A)  If 248Bk were to undergo spontaneous fission,the products would be 247Bk and a neutron.
B)  If 248Bk were to undergo beta decay,the products would be 248Cf and a beta particle.
C)  If 248Bk were to undergo alpha decay,the products would be 244Am and an alpha particle.
D)  If 248Bk were to undergo electron capture,the only product would be 248Cm.
E)  If a metastable form of 248Bk were to undergo gamma decay,the products would be 248Bk and a gamma ray.F) A) and C)
G) All of the above

Question 13

The nuclide - particle emissions occurs,taking the atom through many transformations to end up as an atom of   ) How many α particles are emitted in converting   Into   ? A) 6 B) 2 C) 214 D) 8 E) 4" class="answers-bank-image d-inline" rel="preload" > is radioactive.When one of these atoms decays,a series of α and β- particle emissions occurs,taking the atom through many transformations to end up as an atom of - particle emissions occurs,taking the atom through many transformations to end up as an atom of   ) How many α particles are emitted in converting   Into   ? A) 6 B) 2 C) 214 D) 8 E) 4" class="answers-bank-image d-inline" rel="preload" >
) How many α particles are emitted in converting - particle emissions occurs,taking the atom through many transformations to end up as an atom of   ) How many α particles are emitted in converting   Into   ? A) 6 B) 2 C) 214 D) 8 E) 4" class="answers-bank-image d-inline" rel="preload" >
Into - particle emissions occurs,taking the atom through many transformations to end up as an atom of   ) How many α particles are emitted in converting   Into   ? A) 6 B) 2 C) 214 D) 8 E) 4" class="answers-bank-image d-inline" rel="preload" >
?

Accepted Answer

A)  6
B)  2
C)  214
D)  8
E)  4F) None of the above
G) C) and D)

Question 14

Relative to the sum of the masses of its constituent nucleons (neutrons + protons) ,the mass of a nucleus is

Accepted Answer

A)  always greater.
B)  sometimes the same and sometimes smaller.
C)  always smaller.
D)  always the same.
E)  sometimes greater and sometimes smaller.F) A) and C)
G) A) and E)

Question 15

When 103Pd undergoes electron capture,what is the product nuclide?

Accepted Answer

A)  (103Ag) 
B)  (101Rh) 
C)  (107Ag) 
D)  (103Rh) 
E)  (104Cd) F) None of the above
G) C) and D)

Question 16

What assumption must be true for radiocarbon (14C) dating to be useful?

Accepted Answer

A)  (14
C)   has the same mass as 12C.
B)  A constant concentration of 14C is maintained in living plants and animals through equilibration with atmospheric levels of 14C.
C)  The sample cannot have been chemically altered prior to the analysis.
D)  (14
C)   always decays at the same rate.
E)  (14
C)   is nonradioactive.F) None of the above
G) B) and E)

Question 17

Which of these is not a transuranium element?

Accepted Answer

A)  plutonium
B)  neptunium
C)  curium
D)  thorium
E)  americiumF) B) and C)
G) C) and D)

Question 18

Which of the following particles cannot be accelerated to high speeds in a particle accelerator or cyclotron?

Accepted Answer

A)  neutrons
B)  electrons
C)  protons
D)  alpha particles
E)  hydrogen nucleiF) B) and C)
G) A) and B)

Question 19

Which of the following nuclides will produce 192Pt upon undergoing beta decay?

Accepted Answer

A)  (192Ir) 
B)  (193Pt) 
C)  (192Au) 
D)  (196Hg) 
E)  (188Os) F) B) and E)
G) D) and E)

Question 20

When 235U collides with one neutron,fission occurs.What is one possible set of products?

Accepted Answer

A)  four neutrons,90Sr,and 140Xe
B)  four neutrons,90Sr,and 139Xe
C)  four neutrons,90Sr,and 139Ce
D)  four neutrons,90Sr,and 141Xe
E)  four neutrons,90Sr,and 142XeF) B) and D)
G) A) and C)

Exam 20: Nuclear Chemistry

Which of the following statements is(are) true for the fission of uranium-235?

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The isotope 210Pb has a half-life of 22 years.What percentage of a pure 210Pb sample prepared in April 1937 remains in April 1994?

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Relative to the sum of the masses of its constituent nucleons (neutrons + protons) ,the mass of a nucleus is

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Iodine-131,which is used to treat thyroid cancer,has a half-life of 8.04 days.How much time is required for 68% of the isotope to decay?

Correct AnswerverifiedShow Answer

Metastable isotopes,such as Technetium-99m and those produced from neutron activation analysis decay by what process?

Correct AnswerverifiedShow Answer

Which of the following statements about 248Bk is incorrect?

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Which of the following nuclides will produce 233Pa upon undergoing alpha decay?

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When 235U collides with one neutron,fission occurs.What is one possible set of products?

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The gamma ray emission from the decay of cobalt-60 is used in cancer therapies.Cobalt-60 decays by the emission of two gamma rays followed by beta emission.What is the final product of this decay process?

Correct AnswerverifiedShow Answer

When 103Pd undergoes electron capture,what is the product nuclide?

Correct AnswerverifiedShow Answer

What assumption must be true for radiocarbon (14C) dating to be useful?

Correct AnswerverifiedShow Answer

Which of the following particles cannot be accelerated to high speeds in a particle accelerator or cyclotron?

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What is the decay constant for a particular radioactive element that has a half-life of 5.66 years?

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Which of the following nuclides will produce 192Pt upon undergoing beta decay?

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Consider a certain type of nucleus that has a rate constant of 2.43 × 10-2 min-1.Calculate the time required for the sample to decay to one-fourth of its initial value.

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Which of the following is the most likely mode of decay for the radioactive nuclide ?

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A sample of wood from an Egyptian mummy case gives a count of 8.5 cpm/gC (counts per minute per gram of carbon) .How old is the wood? (The initial decay rate of Is 15.3 cpm/g C,and its half-life is 5730 years.)

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When a neutron in the nucleus is converted to a proton,which of the following is emitted?

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Which of these is not a transuranium element?

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The nuclide is radioactive.When one of these atoms decays,a series of α and β- particle emissions occurs,taking the atom through many transformations to end up as an atom of ) How many α particles are emitted in converting Into ?

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The isotope ²¹⁰Pb has a half-life of 22 years.What percentage of a pure ²¹⁰Pb sample prepared in April 1937 remains in April 1994?

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Which of the following statements about ²⁴⁸Bk is incorrect?

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Which of the following nuclides will produce ²³³Pa upon undergoing alpha decay?

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When ²³⁵U collides with one neutron,fission occurs.What is one possible set of products?

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When ¹⁰³Pd undergoes electron capture,what is the product nuclide?

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What assumption must be true for radiocarbon (¹⁴C) dating to be useful?

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Which of the following nuclides will produce ¹⁹²Pt upon undergoing beta decay?

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Consider a certain type of nucleus that has a rate constant of 2.43 × 10^-2 min^-1.Calculate the time required for the sample to decay to one-fourth of its initial value.

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The nuclide is radioactive.When one of these atoms decays,a series of α and β^- particle emissions occurs,taking the atom through many transformations to end up as an atom of ) How many α particles are emitted in converting Into ?

Correct Answer
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