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Iodine-131,t1/2 = 8.0 days,is used in diagnosis and treatment of thyroid gland diseases.If a laboratory sample of iodine-131 initially emits 9.95 ×\times 1018 β\beta particles per day,how long will it take for the activity to drop to 6.22 ×\times 1017 β\beta particles per day?


A) 2.0 days
B) 16 days
C) 32 days
D) 128 days
E) None of these choices is correct.

F) All of the above
G) B) and C)

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The isotope The isotope Has a half-life of 7.5 seconds.If a sample contains 144 atoms of ,approximately how many such atoms were there present 30 seconds earlier? A) 576 B) 1152 C) 2304 D) 4320 E) 4.30 \times 10<sup>8</sup> Has a half-life of 7.5 seconds.If a sample contains 144 atoms of The isotope Has a half-life of 7.5 seconds.If a sample contains 144 atoms of ,approximately how many such atoms were there present 30 seconds earlier? A) 576 B) 1152 C) 2304 D) 4320 E) 4.30 \times 10<sup>8</sup> ,approximately how many such atoms were there present 30 seconds earlier?


A) 576
B) 1152
C) 2304
D) 4320
E) 4.30 ×\times 108

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

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A certain isotope has a specific activity of 7.29 ×\times 10-4 Ci/g.How many α\alpha particles will a 75.0 mg sample emit in one hour?


A) 9.99 ×\times 104
B) 2.02 ×\times 106
C) 7.28 ×\times 109
D) 1.29 ×\times 1012
E) None of these choices is correct.

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

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After 4 half-lives,the fraction of a radioactive isotope which still remains is approximately one eighth.

A) True
B) False

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Identify the missing species in the following nuclear transmutation. Identify the missing species in the following nuclear transmutation. A) B) C) D) E)


A)
Identify the missing species in the following nuclear transmutation. A) B) C) D) E)
B)
Identify the missing species in the following nuclear transmutation. A) B) C) D) E)
C)
Identify the missing species in the following nuclear transmutation. A) B) C) D) E)
D)
Identify the missing species in the following nuclear transmutation. A) B) C) D) E)
E)
Identify the missing species in the following nuclear transmutation. A) B) C) D) E)

F) A) and B)
G) A) and C)

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Radioactive decay follows zero-order kinetics.

A) True
B) False

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Fill in missing sub- and superscripts for all particles to complete the following equation for positron decay. Fill in missing sub- and superscripts for all particles to complete the following equation for positron decay.

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Briefly explain the relationship between the rad and the rem as units of radiation dosage.

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The rad (radiation absorbed dose)measure...

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Write a complete,balanced equation to represent the electron capture decay of argon-37.

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Select the nuclide that completes the following nuclear reaction. Select the nuclide that completes the following nuclear reaction. A) B) C) D) E)


A)
Select the nuclide that completes the following nuclear reaction. A) B) C) D) E)
B)
Select the nuclide that completes the following nuclear reaction. A) B) C) D) E)
C)
Select the nuclide that completes the following nuclear reaction. A) B) C) D) E)
D)
Select the nuclide that completes the following nuclear reaction. A) B) C) D) E)
E)
Select the nuclide that completes the following nuclear reaction. A) B) C) D) E)

F) B) and D)
G) D) and E)

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A pure sample of tritium,3H,was prepared and sealed in a container for a number of years.Tritium undergoes β\beta 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?


A) 2.34 y
B) 3.38 y
C) 9.77 y
D) 14.1 y
E) 25.6 y

F) C) and D)
G) B) and D)

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Which one of the following equations correctly represents electron capture by the Which one of the following equations correctly represents electron capture by the Nucleus? A) B) C) D) E) Nucleus?


A)
Which one of the following equations correctly represents electron capture by the Nucleus? A) B) C) D) E)
B)
Which one of the following equations correctly represents electron capture by the Nucleus? A) B) C) D) E)
C)
Which one of the following equations correctly represents electron capture by the Nucleus? A) B) C) D) E)
D)
Which one of the following equations correctly represents electron capture by the Nucleus? A) B) C) D) E)
E)
Which one of the following equations correctly represents electron capture by the Nucleus? A) B) C) D) E)

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

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Which of the following materials is put into a nuclear reactor to slow the chain reaction?


A) heavy water
B) moderators
C) control rods
D) reflectors
E) chlorine

F) A) and B)
G) B) and E)

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The isotope The isotope Is unstable.This is predictable because A) N/Z \neq 1. B) N/Z is relatively low and Z < 20. C) N/Z is relatively large and Z < 20. D) Z is small. E) N is large. Is unstable.This is predictable because


A) N/Z ≠\neq 1.
B) N/Z is relatively low and Z < 20.
C) N/Z is relatively large and Z < 20.
D) Z is small.
E) N is large.

F) B) and D)
G) All of the above

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The binding energy per nucleon reaches a maximum for the isotope The binding energy per nucleon reaches a maximum for the isotope . .

A) True
B) False

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An isotope with a low value of N/Z will generally decay through


A) ( α\alpha decay.)
B) 9 β\beta decay.)
C) ( γ\gamma decay.)
D) electron capture.
E) spontaneous fission.

F) None of the above
G) A) and E)

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Fill in missing sub- and superscripts for all particles to complete the following equation for beta decay. Fill in missing sub- and superscripts for all particles to complete the following equation for beta decay.

Correct Answer

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Select the nuclide that completes the following nuclear reaction. Select the nuclide that completes the following nuclear reaction. A) B) C) D) E)


A)
Select the nuclide that completes the following nuclear reaction. A) B) C) D) E)
B)
Select the nuclide that completes the following nuclear reaction. A) B) C) D) E)
C)
Select the nuclide that completes the following nuclear reaction. A) B) C) D) E)
D)
Select the nuclide that completes the following nuclear reaction. A) B) C) D) E)
E)
Select the nuclide that completes the following nuclear reaction. A) B) C) D) E)

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

Correct Answer

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Which one of the following equations correctly represents alpha decay of Which one of the following equations correctly represents alpha decay of ? A) B) C) D) E) ?


A)
Which one of the following equations correctly represents alpha decay of ? A) B) C) D) E)
B)
Which one of the following equations correctly represents alpha decay of ? A) B) C) D) E)
C)
Which one of the following equations correctly represents alpha decay of ? A) B) C) D) E)
D)
Which one of the following equations correctly represents alpha decay of ? A) B) C) D) E)
E)
Which one of the following equations correctly represents alpha decay of ? A) B) C) D) E)

F) B) and E)
G) A) and B)

Correct Answer

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Write a complete,balanced equation to represent the formation of manganese-55 by the beta decay of another nuclide.

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