Question 1

Which of the following is the correct relationship between the units rad and the gray?

Accepted Answer

A)  1 rad = 100 Gy 
B)  1 rad = 1000 Gy 
C)  1 rad = 0.01 Gy 
D)  1 rad = 0.001 Gy 
A)  1 rad = 100 Gy 
B)  1 rad = 1000 Gy 
C)  1 rad = 0.01 Gy 
D)  1 rad = 0.001 Gy

Question 2

Which of the following is true of nuclear fission reactions?

Accepted Answer

A)  Boron control rods help absorb excess uranium-235 produced during the fission reaction. 
B)  The energy produced by fission reactions is used to generate electricity. 
C)  Nuclear fission involves the controlled combination of two large nuclei with the absorption of energy. 
D)  Each nuclear fission reaction generates six neutrons. 
A)  Boron control rods help absorb excess uranium-235 produced during the fission reaction. 
B)  The energy produced by fission reactions is used to generate electricity. 
C)  Nuclear fission involves the controlled combination of two large nuclei with the absorption of energy. 
D)  Each nuclear fission reaction generates six neutrons.

Question 3

Which of the following Greek letters is not commonly applied to a form of radioactivity?

Accepted Answer

A)  α 
B)  β 
C)  γ 
D)  δ 
A)  α 
B)  β 
C)  γ 
D)  δ

Question 4

What happens to the mass number of an element when an α particle is emitted from its nucleus?

Accepted Answer

A)  The mass number increases. 
B)  The mass number decreases. 
C)  The mass number does not change. 
A)  The mass number increases. 
B)  The mass number decreases. 
C)  The mass number does not change.

Question 5

Which of the following is a non-SI unit of energy that is frequently used in nuclear chemistry?

Accepted Answer

A)  the joule 
B)  the electron volt 
C)  the kilogram 
D)  the ampere 
A)  the joule 
B)  the electron volt 
C)  the kilogram 
D)  the ampere

Question 6

Which statement is true of the wavelength of an electromagnetic radiation?

Accepted Answer

A)  It refers to the number of wave crests that pass a given point in one second. 
B)  It is directly proportional to the frequency of the electromagnetic radiation. 
C)  It is directly proportional to the speed of light in vacuum. 
D)  It refers to the distance between two successive wave crests in an electromagnetic radiation. 
A)  It refers to the number of wave crests that pass a given point in one second. 
B)  It is directly proportional to the frequency of the electromagnetic radiation. 
C)  It is directly proportional to the speed of light in vacuum. 
D)  It refers to the distance between two successive wave crests in an electromagnetic radiation.

Question 7

Which of the following is true of a radioisotope undergoing beta emission?

Accepted Answer

A)  Its mass number decreases by four units, and its atomic number decreases by two units. 
B)  Its mass number decreases by one unit, but the atomic number remains the same. 
C)  Its mass number remains the same, but its atomic number decreases by one unit. 
D)  Its mass number remains the same, but its atomic number increases by one unit. 
A)  Its mass number decreases by four units, and its atomic number decreases by two units. 
B)  Its mass number decreases by one unit, but the atomic number remains the same. 
C)  Its mass number remains the same, but its atomic number decreases by one unit. 
D)  Its mass number remains the same, but its atomic number increases by one unit.

Question 8

When   is bombarded with   a new element and six neutrons are produced. Identify the new element produced by this reaction.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 9

Which of the following radioactive emissions leads to transmutation in radioactive isotopes?

Accepted Answer

A)  α emission 
B)  γ emission 
C)  both a emission and y emission 
D)  none of these 
A)  α emission 
B)  γ emission 
C)  both a emission and y emission 
D)  none of these

Question 10

What is the half-life of uranium-238?

Accepted Answer

A)  3.8 days 
B)  2.8 minutes 
C)  4 × 109 years 
D)  28.1 years 
A)  3.8 days 
B)  2.8 minutes 
C)  4 × 109 years 
D)  28.1 years

Question 11

Which of the following radioisotopes is used in PET scans?

Accepted Answer

A)  H-3 
B)  C-11 
C)  C-14 
D)  P-32 
A)  H-3 
B)  C-11 
C)  C-14 
D)  P-32

Question 12

Examine the following figure.     An isotope of technetium used in nuclear medicine undergoes the following reaction. Which line represents the type of radiation released during the reaction?

Accepted Answer

A)  A 
B)  B 
C)  C 
A)  A 
B)  B 
C)  C

Question 13

Which SI unit is used to measure the radiation absorbed by body tissues from a radiation dose?

Accepted Answer

A)  the curie 
B)  the gray 
C)  the roentgen 
D)  all of them 
A)  the curie 
B)  the gray 
C)  the roentgen 
D)  all of them

Question 14

Which of the following statements is true of a radioisotope undergoing electron capture?

Accepted Answer

A)  A neutron is converted to a proton and an electron. 
B)  The radioisotope does not undergo transmutation and only the energy changes. 
C)  An electron reacts with a proton to form a neutron. 
D)  An electron is absorbed into the nucleus, and an alpha particle is emitted from the radioisotope. 
A)  A neutron is converted to a proton and an electron. 
B)  The radioisotope does not undergo transmutation and only the energy changes. 
C)  An electron reacts with a proton to form a neutron. 
D)  An electron is absorbed into the nucleus, and an alpha particle is emitted from the radioisotope.

Question 15

Which of the following is a form of electromagnetic radiation?

Accepted Answer

A)  α 
B)  β 
C)  γ 
D)  all of these 
A)  α 
B)  β 
C)  γ 
D)  all of these

Question 16

Which of the following isotopes undergoes positron decay to form 24Cr?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 17

Identify the product formed when   emits a β particle.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 18

A radioisotope with mass number A emits an α particle. Identify the mass number of the radioisotope formed by the α emission.

Accepted Answer

A)  A − 4 
B)  A − 2 
C)  A 
D)  A + 2 
A)  A − 4 
B)  A − 2 
C)  A 
D)  A + 2

Question 19

Polonium-210 is an α emitter. Identify the element formed when   emits an α particle.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 20

Which of the following rays are the least penetrating?

Accepted Answer

A)  α rays 
B)  β rays 
C)  γ rays 
D)  β+ rays 
A)  α rays 
B)  β rays 
C)  γ rays 
D)  β+ rays

Exam 9: Nuclear Chemistry

Which of the following is the correct relationship between the units rad and the gray?

Which of the following is true of nuclear fission reactions?

Which of the following Greek letters is not commonly applied to a form of radioactivity?

What happens to the mass number of an element when an α particle is emitted from its nucleus?

Which of the following is a non-SI unit of energy that is frequently used in nuclear chemistry?

Which statement is true of the wavelength of an electromagnetic radiation?

Which of the following is true of a radioisotope undergoing beta emission?

When is bombarded with a new element and six neutrons are produced. Identify the new element produced by this reaction.

Which of the following radioactive emissions leads to transmutation in radioactive isotopes?

What is the half-life of uranium-238?

Which of the following radioisotopes is used in PET scans?

Examine the following figure. An isotope of technetium used in nuclear medicine undergoes the following reaction. Which line represents the type of radiation released during the reaction?

Which SI unit is used to measure the radiation absorbed by body tissues from a radiation dose?

Which of the following statements is true of a radioisotope undergoing electron capture?

Which of the following is a form of electromagnetic radiation?

Which of the following isotopes undergoes positron decay to form 24Cr?

Identify the product formed when emits a β particle.

A radioisotope with mass number A emits an α particle. Identify the mass number of the radioisotope formed by the α emission.

Polonium-210 is an α emitter. Identify the element formed when emits an α particle.

Which of the following rays are the least penetrating?

Matter, Energy, and Measurement

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Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

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Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

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Carbohydrates

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Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

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Which of the following isotopes undergoes positron decay to form ₂₄Cr?