Question 1

Which of the following is used to image the heart?

Accepted Answer

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

Question 2

What is the name for the minimum mass of fissionable material required to generate a self-sustaining nuclear chain reaction?

Accepted Answer

The answer of What is the name for the minimum...

Question 3

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) A) and C)

Question 4

Which type of radiation is the most dangerous to humans?

Accepted Answer

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

Question 5

Which type of radiation is the least dangerous to humans?

Accepted Answer

A)  Positrons
B)  Neutrons
C)  Alpha
D)  Beta
E)  GammaF) C) and E)
G) None of the above

Question 6

In the equation below,what particle or type of radiation needs to be included to balance the equation? 234Th → ? + beta particle

Accepted Answer

A)  Ac-234
B)  Pa-234
C)  Ac-235
D)  Pa-235
E)  Ac-233F) B) and E)
G) B) and C)

Question 7

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 E)
G) B) and C)

Question 8

The 14C activity of some ancient Peruvian corn was found to be 10 disintegrations per minute per gram of carbon.If present-day plant life shows 15 dpm/g,how old is the Peruvian corn? (The half-life of 14C is 5730 yr.)

Accepted Answer

A)  1460 yr
B)  1910 yr
C)  3350 yr
D)  3820 yr
E)  9080 yrF) A) and D)
G) A) and E)

Question 9

Naturally occurring uranium contains approximately 1% U-235 and 99% U-238.Of these,the isotope that undergoes fission in a nuclear reactor is U-238.

Accepted Answer

A) True 
 B)False

Question 10

The difference between the mass of an atom and the sum of the masses of its protons,neutrons,and electrons is called the ___________ ___________.

Accepted Answer

The answer of The difference between the mass of an...

Question 11

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)  (12C (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) B) and E)
G) B) and C)

Question 12

Cobalt-60 is a beta emitter with a half-life of 5.3 years.Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 26.5 years?

Accepted Answer

A)  1/5
B)  1/16
C)  1/26
D)  1/32
E)  1/64F) B) and C)
G) C) and D)

Question 13

In a nuclear reaction elements are converted to other elements.

Accepted Answer

A) True 
 B)False

Question 14

What other particle is emitted when a neutron is converted to a proton in a nucleus?

Accepted Answer

A)  Gamma particle
B)  Alpha particle
C)  Positron
D)  Beta particle
E)  None of the answers is correct.F) C) and E)
G) B) and D)

Question 15

As a result of beta decay,the product nucleus is

Accepted Answer

A)  one atomic number lower than the original element.
B)  two atomic numbers higher than the original element.
C)  one atomic number higher than the original element.
D)  two atomic numbers lower than the original element.
E)  four atomic numbers lower than the original element.F) D) and E)
G) C) and E)

Question 16

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

Question 17

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) D) and E)
G) C) and D)

Question 18

What is the nuclear process called where small nuclei are combined into larger ones?

Accepted Answer

A)  Photonuclear reactions
B)  Nuclear fission
C)  Thermal conductivity
D)  Nuclear combination
E)  Nuclear fusionF) A) and B)
G) All of the above

Question 19

Rubidium-87 decays by beta decay with a half-life of 4.9 × 1010 yr.How many 87Rb atoms are in a moon rock sample that has a rubidium decay rate of 3500 disintegrations per hour?

Accepted Answer

A)  9.0 × 1016 atoms
B)  4.3 × 10-4 atoms
C)  2.2 × 1018 atoms
D)  2.5 × 1014 atoms
E)  1.7 × 1014 atomsF) A) and D)
G) A) and C)

Question 20

Which of the following is used to image the liver?

Accepted Answer

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

Exam 20: Nuclear Chemistry

In the equation below,what particle or type of radiation needs to be included to balance the equation? ²³⁴Th → ? + beta particle

Correct Answer
verified

The ¹⁴C activity of some ancient Peruvian corn was found to be 10 disintegrations per minute per gram of carbon.If present-day plant life shows 15 dpm/g,how old is the Peruvian corn? (The half-life of ¹⁴C is 5730 yr.)

Correct Answer
verified

In a nuclear reaction elements are converted to other elements.

Correct Answer
verified

What is the name for the minimum mass of fissionable material required to generate a self-sustaining nuclear chain reaction?

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

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

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
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Which type of radiation is the least dangerous to humans?

Correct Answer
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Which type of radiation is the most dangerous to humans?

Correct Answer
verified

Rubidium-87 decays by beta decay with a half-life of 4.9 × 10¹⁰ yr.How many ⁸⁷Rb atoms are in a moon rock sample that has a rubidium decay rate of 3500 disintegrations per hour?

Correct Answer
verified

What other particle is emitted when a neutron is converted to a proton in a nucleus?

Correct Answer
verified

What is the nuclear process called where small nuclei are combined into larger ones?

Correct Answer
verified

Cobalt-60 is a beta emitter with a half-life of 5.3 years.Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 26.5 years?

Correct Answer
verified

As a result of beta decay,the product nucleus is

Correct Answer
verified

Naturally occurring uranium contains approximately 1% U-235 and 99% U-238.Of these,the isotope that undergoes fission in a nuclear reactor is U-238.

Correct Answer
verified

Which of the following is used to image the liver?

Correct Answer
verified

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 Answer
verified

The difference between the mass of an atom and the sum of the masses of its protons,neutrons,and electrons is called the _ _.

Correct Answer
verified

Which of the following is used to image the heart?

Correct Answer
verified

Exam 20: Nuclear Chemistry

In the equation below,what particle or type of radiation needs to be included to balance the equation? 234Th → ? + beta particle

Correct AnswerverifiedShow Answer

The 14C activity of some ancient Peruvian corn was found to be 10 disintegrations per minute per gram of carbon.If present-day plant life shows 15 dpm/g,how old is the Peruvian corn? (The half-life of 14C is 5730 yr.)

Correct AnswerverifiedShow Answer

In a nuclear reaction elements are converted to other elements.

Correct AnswerverifiedShow Answer

What is the name for the minimum mass of fissionable material required to generate a self-sustaining nuclear chain reaction?

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

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

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

Correct AnswerverifiedShow Answer

Which type of radiation is the least dangerous to humans?

Correct AnswerverifiedShow Answer

Which type of radiation is the most dangerous to humans?

Correct AnswerverifiedShow Answer

Rubidium-87 decays by beta decay with a half-life of 4.9 × 1010 yr.How many 87Rb atoms are in a moon rock sample that has a rubidium decay rate of 3500 disintegrations per hour?

Correct AnswerverifiedShow Answer

What other particle is emitted when a neutron is converted to a proton in a nucleus?

Correct AnswerverifiedShow Answer

What is the nuclear process called where small nuclei are combined into larger ones?

Correct AnswerverifiedShow Answer

Cobalt-60 is a beta emitter with a half-life of 5.3 years.Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 26.5 years?

Correct AnswerverifiedShow Answer

As a result of beta decay,the product nucleus is

Correct AnswerverifiedShow Answer

Naturally occurring uranium contains approximately 1% U-235 and 99% U-238.Of these,the isotope that undergoes fission in a nuclear reactor is U-238.

Correct AnswerverifiedShow Answer

Which of the following is used to image the liver?

Correct AnswerverifiedShow 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

The difference between the mass of an atom and the sum of the masses of its protons,neutrons,and electrons is called the ___________ ___________.

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? ²³⁴Th → ? + beta particle

Correct Answer
verified

The ¹⁴C activity of some ancient Peruvian corn was found to be 10 disintegrations per minute per gram of carbon.If present-day plant life shows 15 dpm/g,how old is the Peruvian corn? (The half-life of ¹⁴C is 5730 yr.)

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Rubidium-87 decays by beta decay with a half-life of 4.9 × 10¹⁰ yr.How many ⁸⁷Rb atoms are in a moon rock sample that has a rubidium decay rate of 3500 disintegrations per hour?

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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The difference between the mass of an atom and the sum of the masses of its protons,neutrons,and electrons is called the _ _.

Correct Answer
verified

Correct Answer
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