Question 1

Beta particles are identical to

Accepted Answer

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

Question 2

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?

Accepted Answer

A)  4.38 × 10-2 yr
B)  11.4 yr
C)  0.25 yr
D)  15.8 yr
E)  9.1 yrF) A) and D)
G) All of the above

Question 3

What is the missing symbol in this plutonium fission reaction?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) None of the above
G) A) and E)

Question 4

A mass of 6.02 × 1026 amu is equivalent to

Accepted Answer

A)  1 J.
B)  1 kg.
C)  1 g.
D)  1 mol.
E)  1 mg.F) None of the above
G) A) and B)

Question 5

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. 3H,content 60% that of freshly bottled wine.Tritium decays by beta decay and has a half-life of 12.3 yr.   A) 0.029 yr B) 7.4 yr C) 9.1 yr D) 16 yr E) 35 yr" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 6

Most nuclear reactors in the United States are __________.

Accepted Answer

A)  heavy water reactors
B)  fusion reactors
C)  breeder reactors
D)  tokamaks
E)  light water reactorsF) A) and B)
G) A) and C)

Question 7

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 5730 years.)

Accepted Answer

A)  Less than 5730 yr
B)  Between 5730 and 11,460 yr
C)  Between 11,460 and 17,190 yr
D)  More than 17,190 yrE) B) and C)
F) B) and D)

Question 8

Cesium-134 is a β emitter with a half-life of 2.0 years.How much of a 2.50-g sample of cesium-134 will remain after 10 years?

Accepted Answer

A)  0.0024 g
B)  0.078 g
C)  0.25 g
D)  0.50 g
E)  80.0 gF) B) and E)
G) A) and B)

Question 9

What is the name for spontaneous emission of particles or electromagnetic radiation by certain nuclei?

Accepted Answer

A)  Protons
B)  Isotopes
C)  Radioactivity
D)  Neutrons
E)  ElectronsF) A) and D)
G) A) and C)

Question 10

In the equation below,what particle or type of radiation needs to be included to balance the equation? 208Po → ? + 208At

Accepted Answer

A)  Gamma particle
B)  Alpha particle
C)  Proton
D)  Beta particle
E)  PositronF) All of the above
G) D) and E)

Question 11

What is the total binding energy of 12C? [12C atomic mass = 12.000 amu; mass of proton = 1.007825 amu; mass of neutron = 1.008665 amu; 1 kg =6.022 x 1026amu; 1 J = 1 (kg•m2) /s2]?

Accepted Answer

A)  1.80 x 10-9 J
B)  1.48 x 10-8 J
C)  3.60 x 10-9 J
D)  8.91 x 1015 JE) B) and C)
F) A) and C)

Question 12

What is the energy equivalent of 1 amu? (c = 2.99792458 × 108 m/s)

Accepted Answer

A)  5.0 × 10-19 J
B)  5.4 × 1043 J
C)  6.6 × 109 J
D)  1.5 × 10-10 JE) A) and B)
F) None of the above

Question 13

Iodine-131,t1/2 = 8.0 days,is used in the diagnosis and treatment of thyroid gland diseases.If a laboratory sample of iodine-131 initially emits 9.95 × 1018 β particles per day,how long will it take for the activity to drop to 6.22 × 1017 β particles per day?

Accepted Answer

A)  2.0 days
B)  16 days
C)  32 days
D)  128 days
E)  None of the answers is correct.F) C) and D)
G) A) and C)

Question 14

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

Accepted Answer

A)  Th
B)  Pu
C)  Ra
D)  Au
E)  PbF) None of the above
G) A) and E)

Question 15

Which statement is false?

Accepted Answer

A)  Fission occurs among the heaviest isotopes,whereas fusion occurs more readily for light isotopes.
B)  The mass defect (Δm) for a fission reaction is negative,whereas Δm for fusion is positive.
C)  In order for fusion reactions to occur,temperatures must be in the millions of degrees.
D)  The fission of Pu-239 atoms produces isotopes of many different elements.
E)  Neutron-induced fission processes can occur at room temperature,rather than at millions of degrees.F) A) and D)
G) C) and D)

Question 16

What is the name for the difference between the mass of an atom and the sum of the masses of its constituent nucleons?

Accepted Answer

A)  Gamma particle
B)  Alpha particle
C)  Mass difference
D)  Beta particle
E)  Mass defectF) A) and B)
G) None of the above

Question 17

The half-life of 14C is 5730 yr.Assuming some charcoal from a campfire 29,000 years old was found,what fraction of the original C-14 would remain today?

Accepted Answer

A)  3.0 × 10-2
B)  0.20
C)  3.5
D)  0.33
E)  0.29F) None of the above
G) A) and C)

Question 18

Nuclear fusion is the combination of small nuclei into larger ones.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following isotopes is least likely to be stable?

Accepted Answer

A)  (40Ca) 
B)  (32S) 
C)  (30Al) 
D)  (55Mn) 
E)  (119Sn) F) B) and E)
G) A) and B)

Question 20

Which equation correctly represents electron capture by the  nucleus?

Accepted Answer

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

Exam 20: Nuclear Chemistry

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.

Correct AnswerverifiedShow Answer

A mass of 6.02 × 1026 amu is equivalent to

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

Nuclear fusion is the combination of small nuclei into larger ones.

Correct AnswerverifiedShow Answer

In the equation below,what particle or type of radiation needs to be included to balance the equation? 208Po → ? + 208At

Correct AnswerverifiedShow Answer

Which statement is false?

Correct AnswerverifiedShow Answer

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 5730 years.)

Correct AnswerverifiedShow Answer

The half-life of 14C is 5730 yr.Assuming some charcoal from a campfire 29,000 years old was found,what fraction of the original C-14 would remain today?

Correct AnswerverifiedShow Answer

Cesium-134 is a β emitter with a half-life of 2.0 years.How much of a 2.50-g sample of cesium-134 will remain after 10 years?

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Beta particles are identical to

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Which equation correctly represents electron capture by the nucleus?

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

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What is the name for spontaneous emission of particles or electromagnetic radiation by certain nuclei?

Correct AnswerverifiedShow Answer

Iodine-131,t1/2 = 8.0 days,is used in the diagnosis and treatment of thyroid gland diseases.If a laboratory sample of iodine-131 initially emits 9.95 × 1018 β particles per day,how long will it take for the activity to drop to 6.22 × 1017 β particles per day?

Correct AnswerverifiedShow Answer

What is the total binding energy of 12C? [12C atomic mass = 12.000 amu; mass of proton = 1.007825 amu; mass of neutron = 1.008665 amu; 1 kg =6.022 x 1026amu; 1 J = 1 (kg•m2) /s2]?

Correct AnswerverifiedShow Answer

What is the missing symbol in this plutonium fission reaction?

Correct AnswerverifiedShow Answer

What is the energy equivalent of 1 amu? (c = 2.99792458 × 108 m/s)

Correct AnswerverifiedShow Answer

What is the name for the difference between the mass of an atom and the sum of the masses of its constituent nucleons?

Correct AnswerverifiedShow Answer

Most nuclear reactors in the United States are __________.

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Which of the following isotopes is least likely to be stable?

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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.

Correct Answer
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A mass of 6.02 × 10²⁶ amu is equivalent to

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In the equation below,what particle or type of radiation needs to be included to balance the equation? ²⁰⁸Po → ? + ²⁰⁸At

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The half-life of ¹⁴C is 5730 yr.Assuming some charcoal from a campfire 29,000 years old was found,what fraction of the original C-14 would remain today?

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Iodine-131,t_1/2 = 8.0 days,is used in the diagnosis and treatment of thyroid gland diseases.If a laboratory sample of iodine-131 initially emits 9.95 × 10¹⁸ β particles per day,how long will it take for the activity to drop to 6.22 × 10¹⁷ β particles per day?

Correct Answer
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What is the total binding energy of ¹²C? [¹²C atomic mass = 12.000 amu; mass of proton = 1.007825 amu; mass of neutron = 1.008665 amu; 1 kg =6.022 x 10²⁶amu; 1 J = 1 (kg•m²) /s²]?

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What is the energy equivalent of 1 amu? (c = 2.99792458 × 10⁸ m/s)

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