Question 1

Which is NOT a way to minimize your exposure to radiation?

Accepted Answer

A)  staying a longer time
B)  wearing a lead apron
C)  keeping a good distance
D)  wearing lead-lined gloves
E)  standing behind a thick concrete wallF) A) and D)
G) B) and C)

Question 2

A wooden object from a prehistoric site has a carbon-14 activity of 10 counts per minute (cpm) compared to 40 cpm for new wood. If carbon-14 has a half-life of 5730 years, what is the age of the wood?

Accepted Answer

A)  22,900 yr
B)  1430 yr
C)  17,200 yr
D)  5730 yr
E)  11,500 yrF) B) and E)
G) A) and B)

Question 3

The radiation dose required to produce death in one-half of the exposed subject animals is termed the ________.

Accepted Answer

The answer of The radiation dose required to produce death...

Question 4

The time needed for a radioactive sample to decay to one-half of its original activity is called the ________.

Accepted Answer

The answer of The time needed for a radioactive sample...

Question 5

Why is it important that radioisotopes used in diagnostic tests have short half-lives?

Accepted Answer

A)  These radioisotopes are less expensive.
B)  These radioisotopes are more abundant in nature.
C)  These radioisotopes have a greater activity so they are easier to monitor.
D)  This is necessary so the radioisotopes will have high energy.
E)  This minimizes the harmful side effects of the radiation.F) A) and E)
G) A) and D)

Question 6

Sodium-24 has a half-life of 15 hours. How many hours is three half-lives?

Accepted Answer

A)  15 hours
B)  45 hours
C)  7.5 hours
D)  30 hours
E)  60 hoursF) C) and D)
G) B) and C)

Question 7

A person begins to suffer radiation sickness at an exposure level of

Accepted Answer

A)  600 rem.
B)  25 rem.
C)  100 rem.
D)  5 rem.
E)  500 rem.F) A) and D)
G) C) and D)

Question 8

Write the word or phrase that best completes each statement or answers the question.

Accepted Answer

The answer of Write the word or phrase that best...

Question 9

Which of the following is suitable as a minimum shielding for beta particles?

Accepted Answer

A)  1 m of water
B)  1 m of concrete
C)  gloves
D)  air
E)  1 cm of leadF) A) and B)
G) B) and E)

Question 10

The diagnostic imaging technique that depends on magnetic fields and radio waves, not radioactivity, is called
________.

Accepted Answer

MRI or mag...

Question 11

One symptom of mild radiation sickness is

Accepted Answer

A)  a raised white cell count.
B)  a raised red blood cell count.
C)  a lowered white cell count.
D)  a lowered red blood cell count.
E)  a white cell count of zero.F) A) and B)
G) C) and D)

Question 12

What particle is emitted in the following nuclear reaction?

Accepted Answer

A)  beta particle
B)  gamma ray
C)  neutron
D)  proton
E)  alpha particleF) D) and E)
G) A) and D)

Question 13

A patient receives  mrads of iodine-131, which emits  If the factor that adjusts for biological damage is 1 for beta particles, how many rems did the patient receive?

Accepted Answer

A)    2.0 
B)    4.0 
C)   40 
D)    0.40 
E)    0.30 F) C) and E)
G) None of the above

Question 14

The most widely used medical isotope in nuclear medicine is

Accepted Answer

A)  I-131.
B)  I-125.
C)  P-32.
D)  Co-60.
E)  Tc-99m.F) A) and B)
G) None of the above

Question 15

The symbol   is a symbol used for a(n)

Accepted Answer

A)  alpha particle.
B)  proton.
C)  beta particle.
D)  neutron.
E)  gamma ray.F) D) and E)
G) A) and E)

Question 16

A sample of cerium-141 for a diagnostic test was dissolved in saline solution to an activity of 4.5 mCi/mL. If the patient undergoing the test needs a dose of 10. mCi, how much of the solution should be injected into the
Patient?

Accepted Answer

A)  .45 mL
B)  2.2 mL
C)  4.5 mL
D)  22 mL
E)  45 mLF) A) and C)
G) B) and D)

Question 17

If absorbed internally, alpha particle emitters are the most damaging because alpha particles

Accepted Answer

A)  have the greatest mass.
B)  consist of high energy electrons.
C)  have the greatest energy.
D)  consist of pure energy.
E)  have the largest charge.F) A) and C)
G) A) and D)

Question 18

Gamma rays require the heaviest shielding of all the common types of nuclear radiation because gamma rays have the

Accepted Answer

A)  lowest energy.
B)  most intense color.
C)  largest particles.
D)  heaviest particles.
E)  highest energy.F) All of the above
G) A) and E)

Question 19

Radium-226 decays by alpha decay to

Accepted Answer

A)  barium-131.
B)  cobalt-60.
C)  radon-222.
D)  polonium-218.
E)  carbon-14.F) D) and E)
G) A) and E)

Question 20

What is missing in the nuclear reaction shown below?

Accepted Answer

A)  a neutron
B)  gamma radiation
C)  an alpha particle
D)  a beta particle
E)  a positronF) C) and D)
G) B) and E)

Exam 5: Nuclear Chemistry

The symbol is a symbol used for a(n)

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The most widely used medical isotope in nuclear medicine is

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The radiation dose required to produce death in one-half of the exposed subject animals is termed the ________.

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What is missing in the nuclear reaction shown below?

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What particle is emitted in the following nuclear reaction?

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A wooden object from a prehistoric site has a carbon-14 activity of 10 counts per minute (cpm) compared to 40 cpm for new wood. If carbon-14 has a half-life of 5730 years, what is the age of the wood?

Correct AnswerverifiedShow Answer

The diagnostic imaging technique that depends on magnetic fields and radio waves, not radioactivity, is called ________.

Correct AnswerverifiedMRI or mag...View AnswerShow Answer

One symptom of mild radiation sickness is

Correct AnswerverifiedShow Answer

A person begins to suffer radiation sickness at an exposure level of

Correct AnswerverifiedShow Answer

Which is NOT a way to minimize your exposure to radiation?

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Which of the following is suitable as a minimum shielding for beta particles?

Correct AnswerverifiedShow Answer

Gamma rays require the heaviest shielding of all the common types of nuclear radiation because gamma rays have the

Correct AnswerverifiedShow Answer

Why is it important that radioisotopes used in diagnostic tests have short half-lives?

Correct AnswerverifiedShow Answer

The time needed for a radioactive sample to decay to one-half of its original activity is called the ________.

Correct AnswerverifiedShow Answer

Write the word or phrase that best completes each statement or answers the question.

Correct AnswerverifiedShow Answer

A sample of cerium-141 for a diagnostic test was dissolved in saline solution to an activity of 4.5 mCi/mL. If the patient undergoing the test needs a dose of 10. mCi, how much of the solution should be injected into the Patient?

Correct AnswerverifiedShow Answer

Sodium-24 has a half-life of 15 hours. How many hours is three half-lives?

Correct AnswerverifiedShow Answer

A patient receives mrads of iodine-131, which emits If the factor that adjusts for biological damage is 1 for beta particles, how many rems did the patient receive?

Correct AnswerverifiedShow Answer

Radium-226 decays by alpha decay to

Correct AnswerverifiedShow Answer

If absorbed internally, alpha particle emitters are the most damaging because alpha particles

Correct AnswerverifiedShow Answer

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MRI or mag...
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