Question 1

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 2

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. 
A) I-131. 
B) I-125. 
C) P-32. 
D) Co-60. 
E) Tc-99m.

Question 3

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

Question 4

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. 
A) lowest energy. 
B) most intense color. 
C) largest particles. 
D) heaviest particles. 
E) highest energy.

Question 5

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. 
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.

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

Question 7

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 8

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 wall 
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 wall

Question 9

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

Question 10

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 
A)   2.0 
B)   4.0 
C)  40 
D)   0.40 
E)   0.30

Question 11

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 12

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. 
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.

Question 13

What particle is emitted in the following nuclear reaction?

Accepted Answer

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

Question 14

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

Accepted Answer

MRI or mag

Question 15

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

Question 16

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 lead 
A) 1 m of water 
B) 1 m of concrete 
C) gloves 
D) air 
E) 1 cm of lead

Question 17

The symbol    is a symbol used for a(n)

Accepted Answer

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

Question 18

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 positron 
A) a neutron 
B) gamma radiation 
C) an alpha particle 
D) a beta particle 
E) a positron

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

Question 20

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. 
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.

Exam 5: Nuclear Chemistry

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

The most widely used medical isotope in nuclear medicine is

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?

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

One symptom of mild radiation sickness is

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

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

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

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

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?

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

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

What particle is emitted in the following nuclear reaction?

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

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?

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

The symbol is a symbol used for a(n)

What is missing in the nuclear reaction shown below?

Radium-226 decays by alpha decay to

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

Chemistry in Our Lives

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