Question 1

A ________ ________ uses electric and magnetic fields to increase the kinetic energy of charged species so that a reaction will occur.

Accepted Answer

particle a...

Question 2

Which type of radiation is the most dangerous to humans?

Accepted Answer

A)   Protons
B)   Neutrons
C)   Alpha
D)   Beta
E)   GammaF) B) and C)
G) B) and D)

Question 3

A typical radius of an atomic nucleus is about

Accepted Answer

A)   100 µm.
B)   5000 mm.
C)   100 nm.
D)   5 × 10-3 pm.
E)   500 pm.F) A) and C)
G) A) and E)

Question 4

In the following diagrams, A represents a radioactive isotope that decays into a new isotope, X. Each circle represents 1 mmol of atoms. t = 0:  t = 25.0 s:  What is the half-life of A?

Accepted Answer

A)   6.25 s
B)   18.8 s
C)   25.0 s
D)   50.0 s
E)   60.2 sF) A) and B)
G) None of the above

Question 5

A 30.0-kg child receives 2.65 × 107 β particles, each with an energy of 4.60 × 10-13 J. If the RBE = 0.78, how many millirem did the child receive?

Accepted Answer

A)   3.2 × 10-7 millirem
B)   5.2 × 10-7 millirem
C)   5.2 × 10-4 millirem
D)   3.2 × 10-2 millirem
E)   None of these choices is correct.F) B) and C)
G) A) and C)

Question 6

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

Accepted Answer

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

Question 7

Uranium-235 decays by alpha emission. What isotope is also produced by this transformation?

Accepted Answer

A)   Pa-234
B)   Th-237
C)   Pu-237
D)   Th-231
E)   Pu-239F) A) and D)
G) A) and C)

Question 8

When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an element are produced. Which particular isotope of this element is formed?

Accepted Answer

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

Question 9

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) C) and D)

Question 10

The radioisotope potassium-40 decays to argon-40 by positron emission with a half-life of 1.3 × 109 yr. A sample of moon rock was found to contain 78 argon-40 atoms for every 22 potassium-40 atoms. The age of the rock is

Accepted Answer

A)   8.1 × 10-10 yr.
B)   2.4 × 109 yr.
C)   2.8 × 109 yr.
D)   4.6 × 109 yr.
E)   6.8 × 109 yr.F) A) and C)
G) A) and D)

Question 11

A gamma particle has a charge of -1.

Accepted Answer

A) True 
 B)False

Question 12

A pure sample of tritium, 3H, was prepared and sealed in a container for a number of years. Tritium undergoes β decay with a half-life of 12.32 years. How long has the container been sealed if analysis of the contents shows there are 5.25 mol of 3H and 6.35 mol of 3He present?

Accepted Answer

A)   2.34 yr
B)   3.38 yr
C)   9.77 yr
D)   14.1 yr
E)   25.6 yrF) C) and D)
G) None of the above

Question 13

Beta particles are identical to

Accepted Answer

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

Question 14

Gamma rays are not deflected by an electric field.

Accepted Answer

A) True 
 B)False

Question 15

Nuclear fission is the process in which a heavy nucleus (mass number > 200) divides to form smaller nuclei of intermediate mass and one or more protons.

Accepted Answer

A) True 
 B)False

Question 16

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

Question 17

A self-sustaining sequence of nuclear fission reactions is called a ________ ________ ________.

Accepted Answer

nuclear ch...

Question 18

In the equation below, what particle or type of radiation needs to be included to balance the equation? 220Rn → ? + alpha particle

Accepted Answer

A)   Ra-224
B)   Rn-224
C)   Rn-216
D)   At-220
E)   Po-216F) B) and D)
G) C) and E)

Question 19

A particle accelerator uses which of the following to increase the kinetic energy of charged species so that a reaction will occur?

Accepted Answer

A)   Electromagnetic fields
B)   Fission reaction
C)   Gravitational field
D)   Fusion reaction
E)   Combustion reactionF) B) and D)
G) D) and E)

Question 20

What is the nuclear binding energy per nucleon of potassium-40? 26 amu; NA = 6.022 × 1023 mol-1; C = 2.99792458 × 108 m/s)  A)  1.33 × 10-12 J/nucleon B)  5.33 × 10-11 J/nucleon C)  5.64 × 10-11 J/nucleon D)  1.41 × 10-12 J/nucleon E)  2.97 × 10-12 J/nucleon" class="answers-bank-image d-inline" rel="preload" > (1 kg = 6.022 × 1026 amu; NA = 6.022 × 1023 mol-1;
C = 2.99792458 × 108 m/s)

Accepted Answer

A)   1.33 × 10-12 J/nucleon
B)   5.33 × 10-11 J/nucleon
C)   5.64 × 10-11 J/nucleon
D)   1.41 × 10-12 J/nucleon
E)   2.97 × 10-12 J/nucleonF) A) and E)
G) All of the above

Exam 20: Nuclear Chemistry

A 30.0-kg child receives 2.65 × 107 β particles, each with an energy of 4.60 × 10-13 J. If the RBE = 0.78, how many millirem did the child receive?

Correct AnswerverifiedShow Answer

In the equation below, what particle or type of radiation needs to be included to balance the equation? 220Rn → ? + alpha particle

Correct AnswerverifiedShow Answer

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 typical radius of an atomic nucleus is about

Correct AnswerverifiedShow Answer

What is the nuclear binding energy per nucleon of potassium-40? (1 kg = 6.022 × 1026 amu; NA = 6.022 × 1023 mol-1; C = 2.99792458 × 108 m/s)

Correct AnswerverifiedShow Answer

A gamma particle has a charge of -1.

Correct AnswerverifiedShow Answer

When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an element are produced. Which particular isotope of this element is formed?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The radioisotope potassium-40 decays to argon-40 by positron emission with a half-life of 1.3 × 109 yr. A sample of moon rock was found to contain 78 argon-40 atoms for every 22 potassium-40 atoms. The age of the rock is

Correct AnswerverifiedShow Answer

A pure sample of tritium, 3H, was prepared and sealed in a container for a number of years. Tritium undergoes β decay with a half-life of 12.32 years. How long has the container been sealed if analysis of the contents shows there are 5.25 mol of 3H and 6.35 mol of 3He present?

Correct AnswerverifiedShow Answer

Uranium-235 decays by alpha emission. What isotope is also produced by this transformation?

Correct AnswerverifiedShow Answer

Which type of radiation is the most dangerous to humans?

Correct AnswerverifiedShow Answer

Beta particles are identical to

Correct AnswerverifiedShow Answer

A particle accelerator uses which of the following to increase the kinetic energy of charged species so that a reaction will occur?

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

A ________ ________ uses electric and magnetic fields to increase the kinetic energy of charged species so that a reaction will occur.

Correct Answerverifiedparticle a...View AnswerShow Answer

In the following diagrams, A represents a radioactive isotope that decays into a new isotope, X. Each circle represents 1 mmol of atoms. t = 0: t = 25.0 s: What is the half-life of A?

Correct AnswerverifiedShow Answer

A self-sustaining sequence of nuclear fission reactions is called a ________ ________ ________.

Correct Answerverifiednuclear ch...View AnswerShow Answer

Gamma rays are not deflected by an electric field.

Correct AnswerverifiedShow Answer

Nuclear fission is the process in which a heavy nucleus (mass number > 200) divides to form smaller nuclei of intermediate mass and one or more protons.

Correct AnswerverifiedShow Answer

A 30.0-kg child receives 2.65 × 10⁷ β particles, each with an energy of 4.60 × 10^-13 J. If the RBE = 0.78, how many millirem did the child receive?

Correct Answer
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In the equation below, what particle or type of radiation needs to be included to balance the equation? ²²⁰Rn → ? + alpha particle

Correct Answer
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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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Correct Answer
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What is the nuclear binding energy per nucleon of potassium-40? (1 kg = 6.022 × 10²⁶ amu; N_A = 6.022 × 10²³ mol^-1; C = 2.99792458 × 10⁸ m/s)

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The radioisotope potassium-40 decays to argon-40 by positron emission with a half-life of 1.3 × 10⁹ yr. A sample of moon rock was found to contain 78 argon-40 atoms for every 22 potassium-40 atoms. The age of the rock is

Correct Answer
verified

A pure sample of tritium, ³H, was prepared and sealed in a container for a number of years. Tritium undergoes β decay with a half-life of 12.32 years. How long has the container been sealed if analysis of the contents shows there are 5.25 mol of ³H and 6.35 mol of ³He present?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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A uses electric and magnetic fields to increase the kinetic energy of charged species so that a reaction will occur.

Correct Answer
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particle a...
View Answer

Correct Answer
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A self-sustaining sequence of nuclear fission reactions is called a .

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nuclear ch...
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Correct Answer
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