Question 1

This reaction is an example of ________.

Accepted Answer

A) alpha decay 
B) beta decay 
C) positron decay 
D) electron capture 
E) gamma emission 
A) alpha decay 
B) beta decay 
C) positron decay 
D) electron capture 
E) gamma emission

Question 2

What happens to the mass number and the atomic number of an element when it undergoes beta decay?

Accepted Answer

A) Neither the mass number nor the atomic number changes. 
B) The mass number decreases by 4 and the atomic number decreases by 2. 
C) The mass number does not change and the atomic number increases by 1. 
D) The mass number does not change and the atomic number decreases by 2. 
E) The mass number increases by 2 and the atomic number increases by 1. 
A) Neither the mass number nor the atomic number changes. 
B) The mass number decreases by 4 and the atomic number decreases by 2. 
C) The mass number does not change and the atomic number increases by 1. 
D) The mass number does not change and the atomic number decreases by 2. 
E) The mass number increases by 2 and the atomic number increases by 1.

Question 3

Cesium-131 has a half-life of 9.7 days.What percent of a cesium-131 sample remains after 62 days?

Accepted Answer

A) 1.2 % 
B) 100 % 
C) 0 % 
D) 99 % 
E) 62% 
A) 1.2 % 
B) 100 % 
C) 0 % 
D) 99 % 
E) 62%

Question 4

The transmutation in which neptunium-239 is produced via bombardment of uranium-238 with a neutron is represented by ________.

Accepted Answer

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

Question 5

Which one of the following is used as a radiotracer to study blood?

Accepted Answer

A) iron-59 
B) technetium-99 
C) sodium-23 
D) iodine-131 
E) phosphorus-32 
A) iron-59 
B) technetium-99 
C) sodium-23 
D) iodine-131 
E) phosphorus-32

Question 6

The transmutation in which a curium-242 nucleus is bombarded with an alpha particle to produce a californium-245 nucleus is represented by ________.

Accepted Answer

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

Question 7

What is the typical percent of uranium-235 in the enriched UO2 pellets used in nuclear reactors?

Accepted Answer

A) 0.7 
B) 1 
C) 3 
D) 10 
E) 14 
A) 0.7 
B) 1 
C) 3 
D) 10 
E) 14

Question 8

A freshly prepared sample of curium-243 undergoes 3312 disintegrations per second.After 8.00 yr,the activity of the sample declines to 2591 disintegrations per second.What is the   in years of   ?

Accepted Answer

A) 22.6 
B) 6.26 
C) 10.2 
D) 1.36 
E) 32.6 
A) 22.6 
B) 6.26 
C) 10.2 
D) 1.36 
E) 32.6

Question 9

Which one of the following can be done to shorten the half-life of the radioactive decay of uranium-238?

Accepted Answer

A) freeze it 
B) heat it 
C) convert it to UF6 
D) oxidize it to the +2 oxidation state 
E) none of the above 
A) freeze it 
B) heat it 
C) convert it to UF6 
D) oxidize it to the +2 oxidation state 
E) none of the above

Question 10

The missing reactant from this reaction is ________.

Accepted Answer

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

Question 11

The SI unit of an absorbed dose of radiation is the gray.

Accepted Answer

A) True 
 B)False

Question 12

The half-life of carbon-11 is 20.3 minutes.How much of a 100.0 mg sample remains after 1.6 hours?

Accepted Answer

A) 3.77 mg 
B) 0.0377 mg 
C) 94.7 mg 
D) 1.75 × 10-89 mg 
E) 99.9 mg 
A) 3.77 mg 
B) 0.0377 mg 
C) 94.7 mg 
D) 1.75 × 10-89 mg 
E) 99.9 mg

Question 13

Electrons do not exist in the nucleus,yet beta emission is ejection of electrons from the nucleus.How does this happen?

Accepted Answer

A neutron breaks apart to prod

Question 14

What is the product for the nuclear transmutation represented by

Accepted Answer

A) carbon-12 
B) carbon-16 
C) nitrogen-16 
D) carbon-14 
E) nitrogen-15 
A) carbon-12 
B) carbon-16 
C) nitrogen-16 
D) carbon-14 
E) nitrogen-15

Question 15

In the nuclear transmutation, 
 ,what is the bombarding particle?

Accepted Answer

A) an alpha particle 
B) a beta particle 
C) a gamma photon 
D) a proton 
E) a phosphorus nucleus 
A) an alpha particle 
B) a beta particle 
C) a gamma photon 
D) a proton 
E) a phosphorus nucleus

Question 16

How many neutrons are emitted when a californium-249 nucleus (Z=98)is bombarded with a nitrogen-15 nucleus to produce a 
 nucleus?

Accepted Answer

A) two 
B) three 
C) four 
D) one 
E) zero 
A) two 
B) three 
C) four 
D) one 
E) zero

Question 17

What is the half-life (in min)of this radionuclide?

Accepted Answer

A) 0.024 
B) 0.022 
C) 32 
D) 0.032 
E) 45 
A) 0.024 
B) 0.022 
C) 32 
D) 0.032 
E) 45

Question 18

What is required for a nuclear transmutation to occur?

Accepted Answer

A) very high temperature 
B) a corrosive environment 
C) a particle to collide with a nucleus or neutron 
D) spontaneous nuclear decay 
E) gamma emission 
A) very high temperature 
B) a corrosive environment 
C) a particle to collide with a nucleus or neutron 
D) spontaneous nuclear decay 
E) gamma emission

Question 19

What radioactive element is used to diagnose medical conditions of the heart and arteries?

Accepted Answer

A) cobalt-60 
B) thallium-201 
C) radium-226 
D) radon-222 
E) thorium-234 
A) cobalt-60 
B) thallium-201 
C) radium-226 
D) radon-222 
E) thorium-234

Question 20

How many radioactive decay series exist in nature?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 10 
A) 0 
B) 1 
C) 2 
D) 3 
E) 10

Exam 21: Nuclear Chemistry

This reaction is an example of ________.

What happens to the mass number and the atomic number of an element when it undergoes beta decay?

Cesium-131 has a half-life of 9.7 days.What percent of a cesium-131 sample remains after 62 days?

The transmutation in which neptunium-239 is produced via bombardment of uranium-238 with a neutron is represented by ________.

Which one of the following is used as a radiotracer to study blood?

The transmutation in which a curium-242 nucleus is bombarded with an alpha particle to produce a californium-245 nucleus is represented by ________.

What is the typical percent of uranium-235 in the enriched UO2 pellets used in nuclear reactors?

A freshly prepared sample of curium-243 undergoes 3312 disintegrations per second.After 8.00 yr,the activity of the sample declines to 2591 disintegrations per second.What is the in years of ?

Which one of the following can be done to shorten the half-life of the radioactive decay of uranium-238?

The missing reactant from this reaction is ________.

The SI unit of an absorbed dose of radiation is the gray.

The half-life of carbon-11 is 20.3 minutes.How much of a 100.0 mg sample remains after 1.6 hours?

Electrons do not exist in the nucleus,yet beta emission is ejection of electrons from the nucleus.How does this happen?

What is the product for the nuclear transmutation represented by

In the nuclear transmutation, ,what is the bombarding particle?

How many neutrons are emitted when a californium-249 nucleus (Z=98)is bombarded with a nitrogen-15 nucleus to produce a nucleus?

What is the half-life (in min)of this radionuclide?

What is required for a nuclear transmutation to occur?

What radioactive element is used to diagnose medical conditions of the heart and arteries?

How many radioactive decay series exist in nature?

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

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