Question 1

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 D)
G) B) and E)

Question 2

Which of the following is used to image the heart?

Accepted Answer

A)   (18O) 
B)   (131I) 
C)   (123I) 
D)   (24Na) 
E)   (99Tc) F) D) and E)
G) A) and B)

Question 3

An 85-kg person exposed to barium-141 receives 2.5 × 105 β particles, each with an energy of 5.2 × 10-13 J. How many rads does the person receive? (1 rad = 1 × 10-5 J/g)

Accepted Answer

A)   2.4 × 10-20 rads
B)   1.5 × 10-7 rads
C)   1.8 × 10-16 rads
D)   6.1 × 10-15 rads
E)   None of the answers is correct.F) A) and B)
G) None of the above

Question 4

The energy released by the sun is the result of

Accepted Answer

A)   natural radioactivity.
B)   nuclear fusion.
C)   combustion of hydrogen.
D)   photosynthesis.
E)   nuclear fission.F) C) and D)
G) B) and E)

Question 5

What causes the radiation damage to matter when gamma rays damages it?

Accepted Answer

A)   Another isotope
B)   Oxidation
C)   Reduction
D)   Free radicals and ions
E)   CorrosionF) B) and C)
G) A) and E)

Question 6

When a87 Br nucleus emits a beta particle, what is the nuclear species that results?

Accepted Answer

Question 7

Which of the following type(s)  of radiation is/are detected by a Geiger counter?

Accepted Answer

A)   Beta particles
B)   Alpha particles
C)   Gamma rays
D)   Beta particles and gamma rays
E)   Alpha particles, beta particles, and gamma raysF) A) and B)
G) None of the above

Question 8

A patient's thyroid gland is to be exposed to an average of 5.5 µCi for 16 days as an ingested sample of iodine-131 decays. If the energy of the β radiation is 9.7 × 10-14 J and the mass of the thyroid is 32.0 g, what is the dose received by the patient? (1 rad = 1 × 10-5 J/g; 1 Ci = 3.7 × 1010 disintegrations/s)

Accepted Answer

A)   0.027 rads
B)   85 rads
C)   37 rads
D)   23 rads
E)   None of the answers is correct.F) B) and C)
G) B) and D)

Question 9

What role does cadmium metal (Cd)  play in a nuclear reactor?

Accepted Answer

A)   Slows down the fission neutrons (moderator) 
B)   Transfers heat from the reactor to the heat exchanger (primary coolant) 
C)   Controls chain reaction (control rods) 
D)   Transfers heat from the condenser to the environment (cooling tower) 
E)   Undergoes fission (fuel rods) F) A) and E)
G) None of the above

Question 10

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) C) and D)
G) A) and D)

Question 11

What is the nuclear binding energy per nucleon of uranium-234? 26 amu; NA = 6.022 × 1023 mol-1; c = 2.99792458 × 108 m/s] A)  2.75 × 10-10 J/nucleon B)  3.04 × 10-10 J/nucleon C)  1.38 × 10-12 J/nucleon D)  1.27 × 10-12 J/nucleon E)  1.18 × 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)   2.75 × 10-10 J/nucleon
B)   3.04 × 10-10 J/nucleon
C)   1.38 × 10-12 J/nucleon
D)   1.27 × 10-12 J/nucleon
E)   1.18 × 10-12 J/nucleonF) B) and C)
G) C) and D)

Question 12

The dose unit of ionizing radiation is called the rad. The rad is defined in terms of

Accepted Answer

A)   the half-life of a radioisotope.
B)   the energy deposited per gram of an object.
C)   the biological damage produced.
D)   the accumulation of fission products.
E)   the number of ions per centimeter.F) B) and E)
G) C) and E)

Question 13

A nuclear reaction's reaction rate is affected by temperature, pressure, and catalysts.

Accepted Answer

A) True 
 B)False

Question 14

What are magic numbers with reference to nuclear stability?

Accepted Answer

A)   The number of nuclear particles of elements not located in the belt of stability
B)   The number of nuclear particles of radioactive elements
C)   The number of nuclear particles in generally more stable nuclei
D)   None of these choices.E) All of the above
F) None of the above

Question 15

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) C) and D)

Question 16

What material is ionized by radiation in a Geiger counter?

Accepted Answer

A)   Helium gas
B)   Neon gas
C)   Liquid water
D)   Argon gas
E)   Radon gasF) B) and E)
G) C) and E)

Question 17

Calcium-39 undergoes positron decay. Each positron carries 5.49 MeV of energy. How much energy will be emitted when 0.00250 mol of calcium-39 decays? (1 MeV = 1.602 × 10-13 J)

Accepted Answer

A)   13.2 kJ
B)   1.32 × 104 kJ
C)   1.32 × 106 kJ
D)   1.32 × 109 kJ
E)   None of these choices is correct.F) C) and D)
G) D) and E)

Question 18

In order to investigate the age of a mineral sample believed to be millions of years old, which would be the best choice of radioactive isotope to measure?

Accepted Answer

A)   (59Fe)  (t1/2 = 45.1 d) 
B)   (12C0)  (t1/2 = 5.72 ×103 yr) 
C)   (53Mn)  (t1/2 = 3.7 ×106 yr) 
D)   (40K)  (t1/2 = 1.2 ×109 yr) 
E)   (238U)  (t1/2 = 4.51 ×109 yr) F) None of the above
G) C) and E)

Question 19

1 joule equals ________.

Accepted Answer

A)   1 kg • m
B)   1 g • m2 • s2
C)   1 kg • m2/s
D)   1 g • m2/s
E)   1 kg • m2/s2F) C) and D)
G) A) and B)

Question 20

All isotopes of elements with atomic numbers higher than 83 (Bi) are radioactive.

Accepted Answer

A) True 
 B)False

Exam 20: Nuclear Chemistry

What are magic numbers with reference to nuclear stability?

Correct Answer
verified

The energy released by the sun is the result of

Correct Answer
verified

An 85-kg person exposed to barium-141 receives 2.5 × 10⁵ β particles, each with an energy of 5.2 × 10^-13 J. How many rads does the person receive? (1 rad = 1 × 10^-5 J/g)

Correct Answer
verified

Which of the following is used to image the heart?

Correct Answer
verified

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

Correct Answer
verified

What is the nuclear binding energy per nucleon of uranium-234? [1 kg = 6.022 × 10²⁶ amu; N_A = 6.022 × 10²³ mol^-1; c = 2.99792458 × 10⁸ m/s]

Correct Answer
verified

In order to investigate the age of a mineral sample believed to be millions of years old, which would be the best choice of radioactive isotope to measure?

Correct Answer
verified

Calcium-39 undergoes positron decay. Each positron carries 5.49 MeV of energy. How much energy will be emitted when 0.00250 mol of calcium-39 decays? (1 MeV = 1.602 × 10^-13 J)

Correct Answer
verified

Which of the following type(s) of radiation is/are detected by a Geiger counter?

Correct Answer
verified

All isotopes of elements with atomic numbers higher than 83 (Bi) are radioactive.

Correct Answer
verified

When a⁸⁷ Br nucleus emits a beta particle, what is the nuclear species that results?

Correct Answer
verified

What role does cadmium metal (Cd) play in a nuclear reactor?

Correct Answer
verified

A nuclear reaction's reaction rate is affected by temperature, pressure, and catalysts.

Correct Answer
verified

Correct Answer
verified

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?

Correct Answer
verified

The dose unit of ionizing radiation is called the rad. The rad is defined in terms of

Correct Answer
verified

What material is ionized by radiation in a Geiger counter?

Correct Answer
verified

What causes the radiation damage to matter when gamma rays damages it?

Correct Answer
verified

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

Correct Answer
verified

1 joule equals ________.

Correct Answer
verified

Exam 20: Nuclear Chemistry

What are magic numbers with reference to nuclear stability?

Correct AnswerverifiedShow Answer

The energy released by the sun is the result of

Correct AnswerverifiedShow Answer

An 85-kg person exposed to barium-141 receives 2.5 × 105 β particles, each with an energy of 5.2 × 10-13 J. How many rads does the person receive? (1 rad = 1 × 10-5 J/g)

Correct AnswerverifiedShow Answer

Which of the following is used to image the heart?

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

What is the nuclear binding energy per nucleon of uranium-234? [1 kg = 6.022 × 1026 amu; NA = 6.022 × 1023 mol-1; c = 2.99792458 × 108 m/s]

Correct AnswerverifiedShow Answer

In order to investigate the age of a mineral sample believed to be millions of years old, which would be the best choice of radioactive isotope to measure?

Correct AnswerverifiedShow Answer

Calcium-39 undergoes positron decay. Each positron carries 5.49 MeV of energy. How much energy will be emitted when 0.00250 mol of calcium-39 decays? (1 MeV = 1.602 × 10-13 J)

Correct AnswerverifiedShow Answer

Which of the following type(s) of radiation is/are detected by a Geiger counter?

Correct AnswerverifiedShow Answer

All isotopes of elements with atomic numbers higher than 83 (Bi) are radioactive.

Correct AnswerverifiedShow Answer

When a87 Br nucleus emits a beta particle, what is the nuclear species that results?

Correct AnswerverifiedShow Answer

What role does cadmium metal (Cd) play in a nuclear reactor?

Correct AnswerverifiedShow Answer

A nuclear reaction's reaction rate is affected by temperature, pressure, and catalysts.

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

The dose unit of ionizing radiation is called the rad. The rad is defined in terms of

Correct AnswerverifiedShow Answer

What material is ionized by radiation in a Geiger counter?

Correct AnswerverifiedShow Answer

What causes the radiation damage to matter when gamma rays damages it?

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

1 joule equals ________.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

An 85-kg person exposed to barium-141 receives 2.5 × 10⁵ β particles, each with an energy of 5.2 × 10^-13 J. How many rads does the person receive? (1 rad = 1 × 10^-5 J/g)

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

What is the nuclear binding energy per nucleon of uranium-234? [1 kg = 6.022 × 10²⁶ amu; N_A = 6.022 × 10²³ mol^-1; c = 2.99792458 × 10⁸ m/s]

Correct Answer
verified

Correct Answer
verified

Calcium-39 undergoes positron decay. Each positron carries 5.49 MeV of energy. How much energy will be emitted when 0.00250 mol of calcium-39 decays? (1 MeV = 1.602 × 10^-13 J)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

When a⁸⁷ Br nucleus emits a beta particle, what is the nuclear species that results?

Correct Answer
verified

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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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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