Question 1

Krypton-79 has a half-life of 35 hours. How many half-lives have passed after 105 hours?

Accepted Answer

A)  1 half-life 
B)  2 half-lives 
C)  3 half-lives 
D)  4 half-lives 
E)  5 half-lives 
A)  1 half-life 
B)  2 half-lives 
C)  3 half-lives 
D)  4 half-lives 
E)  5 half-lives

Question 2

A sample of phosphorus-32 with an activity of 2.0 mCi produces __________ disintegrations per second. (1 Ci = 3.7 × 1010 disintegration/sec).

Accepted Answer

Question 3

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

Accepted Answer

MRI or mag

Question 4

Irradiated food contains small amounts of added radioactive isotopes.

Accepted Answer

A) True 
 B)False

Question 5

The common unit of radioactivity which is used to measure the biological damage is the __________.

Accepted Answer

The answer of The common unit of radioactivity which is...

Question 6

One type of radiation that is not usually used for medical procedures is the cosmic ray.

Accepted Answer

A) True 
 B)False

Question 7

One symbol for the β particle is 0
$- 1$ β. Another symbol for the same particle is __________.

Accepted Answer

The answer of One symbol for the β particle is...

Question 8

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

Question 9

Choose the type of radiation from Column 2 that best matches each item in Column 1.
-0
+1 e

Accepted Answer

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

Question 10

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

Accepted Answer

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

Question 11

Iodine-131 decays by beta emission to

Accepted Answer

A)  iodine-132. 
B)  tellurium-131. 
C)  iodine-130 
D)  bromine-131 
E)  xenon-131. 
A)  iodine-132. 
B)  tellurium-131. 
C)  iodine-130 
D)  bromine-131 
E)  xenon-131.

Question 12

Choose the type of radiation from Column 2 that best matches each item in Column 1.
-α

Accepted Answer

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

Question 13

One symptom of radiation sickness is an increased production of red blood cells. (4,3)

Accepted Answer

A) True 
 B)False

Question 14

The production of nitrogen-13 and a neutron from boron-10 by bombardment with a helium-4 nucleus is an example of radioactive decay.

Accepted Answer

A) True 
 B)False

Question 15

Gamma rays may be detected using

Accepted Answer

A)  a Geiger counter. 
B)  a film badge. 
C)  X-ray film. 
D)  all of the above devices. 
E)  none of the above devices. 
A)  a Geiger counter. 
B)  a film badge. 
C)  X-ray film. 
D)  all of the above devices. 
E)  none of the above devices.

Question 16

The correct symbol for hydrogen-3 is 3
2 He.

Accepted Answer

A) True 
 B)False

Question 17

When a gamma ray is emitted from the nucleus of an atom, the nuclear mass

Accepted Answer

A)  increases by two units. 
B)  decreases by one unit. 
C)  increases by one unit. 
D)  decreases by two units. 
E)  remains the same. 
A)  increases by two units. 
B)  decreases by one unit. 
C)  increases by one unit. 
D)  decreases by two units. 
E)  remains the same.

Question 18

A patient receives 4.2 × 103 mrads of iodine-131, which emits β-particles. If the factor that adjusts for biological damage is 1 for β-particles, how many rems did the patient receive?

Accepted Answer

A)  4 
B)  0.4 
C)  0.3 
D)  2 
E)  40 
A)  4 
B)  0.4 
C)  0.3 
D)  2 
E)  40

Question 19

An imaging technique that detects the energy emitted by hydrogen atoms in a magnetic field is known as

Accepted Answer

A)  positron emission tomography (PET). 
B)  computerized tomography (CT). 
C)  magnetic resonance imaging (MRI). 
D)  radioactive tracer study. 
E)  supermagnetic tomography (SMT). 
A)  positron emission tomography (PET). 
B)  computerized tomography (CT). 
C)  magnetic resonance imaging (MRI). 
D)  radioactive tracer study. 
E)  supermagnetic tomography (SMT).

Question 20

For 85
38 Sr, there are

Accepted Answer

A)  85 protons and 38 neutrons. 
B)  47 protons and 38 neutrons. 
C)  38 protons and 47 neutrons. 
D)  38 protons and 85 neutrons. 
E)  85 protons and 47 neutrons. 
A)  85 protons and 38 neutrons. 
B)  47 protons and 38 neutrons. 
C)  38 protons and 47 neutrons. 
D)  38 protons and 85 neutrons. 
E)  85 protons and 47 neutrons.

Exam 4: Nuclear Chemistry

Krypton-79 has a half-life of 35 hours. How many half-lives have passed after 105 hours?

A sample of phosphorus-32 with an activity of 2.0 mCi produces __________ disintegrations per second. (1 Ci = 3.7 × 1010 disintegration/sec).

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

Irradiated food contains small amounts of added radioactive isotopes.

The common unit of radioactivity which is used to measure the biological damage is the __________.

One type of radiation that is not usually used for medical procedures is the cosmic ray.

One symbol for the β particle is 0 −1- 1−1 β. Another symbol for the same particle 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?

Choose the type of radiation from Column 2 that best matches each item in Column 1. -0 +1 e

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

Iodine-131 decays by beta emission to

Choose the type of radiation from Column 2 that best matches each item in Column 1. -α

One symptom of radiation sickness is an increased production of red blood cells. (4,3)

The production of nitrogen-13 and a neutron from boron-10 by bombardment with a helium-4 nucleus is an example of radioactive decay.

Gamma rays may be detected using

The correct symbol for hydrogen-3 is 3 2 He.

When a gamma ray is emitted from the nucleus of an atom, the nuclear mass

A patient receives 4.2 × 103 mrads of iodine-131, which emits β-particles. If the factor that adjusts for biological damage is 1 for β-particles, how many rems did the patient receive?

An imaging technique that detects the energy emitted by hydrogen atoms in a magnetic field is known as

For 85 38 Sr, there are

Chemistry and Measurements

Energy and Matter

Atoms and Elements

Compounds and Their Bonds

Chemical Reactions and Quantities

Gases

Solutions

Reaction Rates and Chemical Equilibrium

Acids and Bases

Introduction to Organic Chemistry: Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Phenols, Thiols, and Ethers

Aldehydes, Ketones, and Chiral Molecules

Carbohydrates

Carboxylic Acids and Esters

Lipids

Amines and Amides

Amino Acids and Proteins

Enzymes and Vitamins

Nucleic Acids and Protein Synthesis

Metabolic Pathways for Carbohydrates

Metabolism and Energy Production

Metabolic Pathways for Lipids and Amino Acids

Filters

A sample of phosphorus-32 with an activity of 2.0 mCi produces __________ disintegrations per second. (1 Ci = 3.7 × 10¹⁰ disintegration/sec).

One symbol for the β particle is 0 $- 1$ β. Another symbol for the same particle is __________.

A patient receives 4.2 × 10³ mrads of iodine-131, which emits β-particles. If the factor that adjusts for biological damage is 1 for β-particles, how many rems did the patient receive?