Question 1

Which of the following affects the half-life of a radioactive sample?

Accepted Answer

A)  the age of the sample 
B)  the size of the sample 
C)  the temperature of the sample 
D)  none of these 
A)  the age of the sample 
B)  the size of the sample 
C)  the temperature of the sample 
D)  none of these

Question 2

Strontium-90 is a dangerous isotope because strontium is chemically similar to calcium and is easily incorporated into bones. Sr-90 has a half-life of 28.1 years. If a person ingests 100 mg of Sr-90, identify the amount that is left in the person's body after 56.2 years.

Accepted Answer

A)  75.5 mg 
B)  50 mg 
C)  25 mg 
D)  12.5 mg 
A)  75.5 mg 
B)  50 mg 
C)  25 mg 
D)  12.5 mg

Question 3

When alpha, beta, and gamma radiations interact with matter, _____ are knocked out, forming positively charged ions.

Accepted Answer

A)  protons 
B)  neutrons 
C)  electrons 
D)  positrons 
A)  protons 
B)  neutrons 
C)  electrons 
D)  positrons

Question 4

Which of the following is true of MRI imaging?

Accepted Answer

A)  It is based on the property that certain isotopes, when injected into the body, emit positrons that can be detected in the body. 
B)  Diseased and damaged tissues often yield the same image as healthy tissues. 
C)  Cells exposed to radiations from MRIs often develop harmful mutations. 
D)  It is based on the absorption of energy when certain nuclei are excited by a strong magnetic field. 
E)  It involves ingesting a radioactive isotope and measuring the radiation intensity emitted by different regions in the body. 
A)  It is based on the property that certain isotopes, when injected into the body, emit positrons that can be detected in the body. 
B)  Diseased and damaged tissues often yield the same image as healthy tissues. 
C)  Cells exposed to radiations from MRIs often develop harmful mutations. 
D)  It is based on the absorption of energy when certain nuclei are excited by a strong magnetic field. 
E)  It involves ingesting a radioactive isotope and measuring the radiation intensity emitted by different regions in the body.

Question 5

Identify the element formed when   decays by electron capture.

Accepted Answer

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

Question 6

Which of the following particles is emitted during alpha decay?

Accepted Answer

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

Question 7

Which of the following forms of radiation consists of negatively charged particles?

Accepted Answer

A)  α 
B)  β 
C)  γ 
D)  none of these 
A)  α 
B)  β 
C)  γ 
D)  none of these

Question 8

Identify the product formed by the beta decay of   .

Accepted Answer

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

Question 9

A radioactive isotope in a 9.0-mL vial has an intensity of 300 mCi. How much of the liquid should be injected into a patient to deliver a dose of 50 mCi?

Accepted Answer

A)  0.9 mL 
B)  1.5 mL 
C)  3.0 mL 
D)  4.5 mL 
A)  0.9 mL 
B)  1.5 mL 
C)  3.0 mL 
D)  4.5 mL

Question 10

Examine the following graph for a particular isotope.   A change in which of the following conditions would change the shape of this curve?

Accepted Answer

A)  amount of sample 
B)  temperature 
C)  pressure 
D)  None of these conditions affect the shape of the curve. 
A)  amount of sample 
B)  temperature 
C)  pressure 
D)  None of these conditions affect the shape of the curve.

Question 11

Who among the following scientists discovered X-rays?

Accepted Answer

A)  H. Becquerel 
B)  M. Curie 
C)  A. Einstein 
D)  W. Roentgen 
A)  H. Becquerel 
B)  M. Curie 
C)  A. Einstein 
D)  W. Roentgen

Question 12

Which of the following conversion factors relates the rem to the sievert?

Accepted Answer

A)  1 rem = 100 Sv 
B)  1 rem = 1000 Sv 
C)  1 rem = 0.01 Sv 
D)  1 rem = 0.001 Sv 
A)  1 rem = 100 Sv 
B)  1 rem = 1000 Sv 
C)  1 rem = 0.01 Sv 
D)  1 rem = 0.001 Sv

Question 13

Which of the following Greek letters is used to represent frequency?

Accepted Answer

A)  δ 
B)  γ 
C)  ν 
D)  λ 
A)  δ 
B)  γ 
C)  ν 
D)  λ

Question 14

Which of the following radioisotopes, an α emitter used in the treatment of prostate cancer, is delivered using a monoclonal antibody?

Accepted Answer

A)  Ac-225 
B)  Co-60 
C)  I-125 
D)  P-32 
A)  Ac-225 
B)  Co-60 
C)  I-125 
D)  P-32

Question 15

Which of the following processes is observed when uranium-235 is bombarded with a neutron?

Accepted Answer

A)  nuclear fission 
B)  positron emission 
C)  nuclear fusion 
D)  electron capture 
A)  nuclear fission 
B)  positron emission 
C)  nuclear fusion 
D)  electron capture

Question 16

Which of the following radioisotopes is used in PET scans?

Accepted Answer

A)  C-14 
B)  F-18 
C)  H-3 
D)  P-32 
A)  C-14 
B)  F-18 
C)  H-3 
D)  P-32

Question 17

Identify the symbol used to represent a positron.

Accepted Answer

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

Question 18

A single whole-body exposure to what dose of radiation will almost invariably lead to a person's death in a relatively short time?

Accepted Answer

A)  25 rem 
B)  100 rem 
C)  300 rem 
D)  600 rem 
A)  25 rem 
B)  100 rem 
C)  300 rem 
D)  600 rem

Question 19

Which of the following elements is not likely to be produced by nuclear fission?

Accepted Answer

A)  Ba 
B)  H 
C)  Kr 
D)  Sr 
A)  Ba 
B)  H 
C)  Kr 
D)  Sr

Question 20

Examine the following figure.   ​ Which line represents an alpha particle?

Accepted Answer

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

Exam 9: Nuclear Chemistry

Which of the following affects the half-life of a radioactive sample?

Strontium-90 is a dangerous isotope because strontium is chemically similar to calcium and is easily incorporated into bones. Sr-90 has a half-life of 28.1 years. If a person ingests 100 mg of Sr-90, identify the amount that is left in the person's body after 56.2 years.

When alpha, beta, and gamma radiations interact with matter, _____ are knocked out, forming positively charged ions.

Which of the following is true of MRI imaging?

Identify the element formed when decays by electron capture.

Which of the following particles is emitted during alpha decay?

Which of the following forms of radiation consists of negatively charged particles?

Identify the product formed by the beta decay of .

A radioactive isotope in a 9.0-mL vial has an intensity of 300 mCi. How much of the liquid should be injected into a patient to deliver a dose of 50 mCi?

Examine the following graph for a particular isotope. A change in which of the following conditions would change the shape of this curve?

Who among the following scientists discovered X-rays?

Which of the following conversion factors relates the rem to the sievert?

Which of the following Greek letters is used to represent frequency?

Which of the following radioisotopes, an α emitter used in the treatment of prostate cancer, is delivered using a monoclonal antibody?

Which of the following processes is observed when uranium-235 is bombarded with a neutron?

Which of the following radioisotopes is used in PET scans?

Identify the symbol used to represent a positron.

A single whole-body exposure to what dose of radiation will almost invariably lead to a person's death in a relatively short time?

Which of the following elements is not likely to be produced by nuclear fission?

Examine the following figure. ​ Which line represents an alpha particle?

Matter, Energy, and Measurement

Atoms

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

Filters

Examine the following figure. Which line represents an alpha particle?