Question 1

What is isotopic enrichment and why was it a crucial step in the manufacture of the first atomic bomb?

Accepted Answer

Enrichment is the pr

Question 2

Nuclear science has saved many more lives than have been destroyed by nuclear bombs.

Accepted Answer

A) True 
 B)False

Question 3

UF₆ containing uranium-235 can be separated from UF₆ containing uranium-238 because

Accepted Answer

A) compounds containing uranium-235 react differently than compounds containing uranium-238. 
B) UF₆ containing uranium-235 is lighter and will travel faster than UF₆ containing uranium-238. 
C) UF₆ containing uranium-235 is lighter and will travel more slowly than UF₆ containing uranium-238. 
D) They cannot be separated. 
A) compounds containing uranium-235 react differently than compounds containing uranium-238. 
B) UF₆ containing uranium-235 is lighter and will travel faster than UF₆ containing uranium-238. 
C) UF₆ containing uranium-235 is lighter and will travel more slowly than UF₆ containing uranium-238. 
D) They cannot be separated.

Question 4

Phosphorus-30 decays by positron emission.The product is

Accepted Answer

A) silicon-30. 
B) phosphorus-29. 
C) sulfur-30. 
D) sulfur-29. 
A) silicon-30. 
B) phosphorus-29. 
C) sulfur-30. 
D) sulfur-29.

Question 5

Identify a problem with nuclear power plants.

Accepted Answer

A) must be built by water 
B) spent fuel changed into weapons 
C) must be built on a mountain 
D) population wants in next door 
A) must be built by water 
B) spent fuel changed into weapons 
C) must be built on a mountain 
D) population wants in next door

Question 6

One difference between a chemical reaction and a nuclear reaction is that in a nuclear reaction

Accepted Answer

A) atoms retain their identity. 
B) atoms often change from one element to another. 
C) only the valence electrons are involved. 
D) only small amounts of energy are absorbed or emitted. 
A) atoms retain their identity. 
B) atoms often change from one element to another. 
C) only the valence electrons are involved. 
D) only small amounts of energy are absorbed or emitted.

Question 7

The process of positron emission can be considered as the

Accepted Answer

A) conversion of a neutron to a proton and a positron.The positron is emitted. 
B) conversion of a neutron to a proton and an electron.The electron is emitted. 
C) conversion of a proton to a neutron and a positron.The neutron is emitted. 
D) conversion of a proton to an neutron and a positron.The positron is emitted. 
A) conversion of a neutron to a proton and a positron.The positron is emitted. 
B) conversion of a neutron to a proton and an electron.The electron is emitted. 
C) conversion of a proton to a neutron and a positron.The neutron is emitted. 
D) conversion of a proton to an neutron and a positron.The positron is emitted.

Question 8

Carbon-14 dating of ancient objects is particularly effective because C-14

Accepted Answer

A) has the shortest half-life. 
B) is continuously produced in the upper atmosphere and its ratio to C-12 in living systems and the environment is constant. 
C) is a stable isotope and is therefore particularly easy to work with. 
D) decays by a simple fission reaction. 
A) has the shortest half-life. 
B) is continuously produced in the upper atmosphere and its ratio to C-12 in living systems and the environment is constant. 
C) is a stable isotope and is therefore particularly easy to work with. 
D) decays by a simple fission reaction.

Question 9

The process of alpha decay results in what change in the atomic number?

Accepted Answer

A) a decrease of 2 
B) a decrease of 1 
C) an increase of 1 
D) no change 
A) a decrease of 2 
B) a decrease of 1 
C) an increase of 1 
D) no change

Question 10

decays by beta emission.The product is

Accepted Answer

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

Question 11

The nuclear synthesis of plutonium-239 was an important part of the effort to build an atomic bomb during World War II because

Accepted Answer

A) plutonium-239 is required to cause uranium-235 to fission. 
B) plutonium-239 is fissionable. 
C) plutonium-239 has a longer half-life than uranium-235. 
D) of all of these reasons 
A) plutonium-239 is required to cause uranium-235 to fission. 
B) plutonium-239 is fissionable. 
C) plutonium-239 has a longer half-life than uranium-235. 
D) of all of these reasons

Question 12

After five half-lives,what percentage of the original radioactive isotope remains in a sample?

Accepted Answer

A) 0% 
B) 50% 
C) 3)13% 
D) 6)25% 
A) 0% 
B) 50% 
C) 3)13% 
D) 6)25%

Question 13

Identify which one was NOT a malfunction at a nuclear power plant.

Accepted Answer

A) A tornado tore a roof of the cooling plant resulting in a release of radioactive gas. 
B) A partial meltdown of the core occurred. 
C) A fire resulted in the release of radioactivity into the surrounding area. 
D) An earthquake caused a tsunami, and flooded the nuclear plant.The cooling system failed, a partial core meltdown occurred, and radioactive material was released. 
A) A tornado tore a roof of the cooling plant resulting in a release of radioactive gas. 
B) A partial meltdown of the core occurred. 
C) A fire resulted in the release of radioactivity into the surrounding area. 
D) An earthquake caused a tsunami, and flooded the nuclear plant.The cooling system failed, a partial core meltdown occurred, and radioactive material was released.

Question 14

Atoms that have the same atomic number but different numbers of neutrons are

Accepted Answer

A) radioactive. 
B) isotopes. 
C) impossible. 
D) ions. 
A) radioactive. 
B) isotopes. 
C) impossible. 
D) ions.

Question 15

Plutonium-239 can undergo nuclear fission.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following particles has a mass of 1 amu and a charge of 0?

Accepted Answer

A) neutron 
B) proton 
C) electron 
D) positron 
A) neutron 
B) proton 
C) electron 
D) positron

Question 17

When nitrogen-14 is bombarded by alpha particles ,a proton is produced.What other particle is emitted?

Accepted Answer

A) a neutron 
B) oxygen-16 
C) a positron 
D) oxygen-17 
A) a neutron 
B) oxygen-16 
C) a positron 
D) oxygen-17

Question 18

The diameter of an atom is 100,000 times as great as the diameter of its nucleus.If an atom could be expanded to the size of a classroom the nucleus would be about the size of a

Accepted Answer

A) BB. 
B) marble. 
C) basketball. 
D) period at the end of a sentence. 
A) BB. 
B) marble. 
C) basketball. 
D) period at the end of a sentence.

Question 19

Critical mass is

Accepted Answer

A) the minimum amount of fissionable material that will sustain a chain reaction. 
B) the maximum amount of fissionable material that will sustain a chain reaction. 
C) the amount of fissionable material that produces the most energy when split. 
D) the largest amount of fissionable material that can be obtained from isotopic enrichment. 
A) the minimum amount of fissionable material that will sustain a chain reaction. 
B) the maximum amount of fissionable material that will sustain a chain reaction. 
C) the amount of fissionable material that produces the most energy when split. 
D) the largest amount of fissionable material that can be obtained from isotopic enrichment.

Question 20

When radium-223 undergoes alpha decay,what other product is formed?

Accepted Answer

A) radium-219 
B) radium-224 
C) actinium-224 
D) radon-219 
A) radium-219 
B) radium-224 
C) actinium-224 
D) radon-219

Exam 11: Nuclear Chemistry

What is isotopic enrichment and why was it a crucial step in the manufacture of the first atomic bomb?

Nuclear science has saved many more lives than have been destroyed by nuclear bombs.

UF₆ containing uranium-235 can be separated from UF₆ containing uranium-238 because

Phosphorus-30 decays by positron emission.The product is

Identify a problem with nuclear power plants.

One difference between a chemical reaction and a nuclear reaction is that in a nuclear reaction

The process of positron emission can be considered as the

Carbon-14 dating of ancient objects is particularly effective because C-14

The process of alpha decay results in what change in the atomic number?

decays by beta emission.The product is

The nuclear synthesis of plutonium-239 was an important part of the effort to build an atomic bomb during World War II because

After five half-lives,what percentage of the original radioactive isotope remains in a sample?

Identify which one was NOT a malfunction at a nuclear power plant.

Atoms that have the same atomic number but different numbers of neutrons are

Plutonium-239 can undergo nuclear fission.

Which of the following particles has a mass of 1 amu and a charge of 0?

When nitrogen-14 is bombarded by alpha particles ,a proton is produced.What other particle is emitted?

The diameter of an atom is 100,000 times as great as the diameter of its nucleus.If an atom could be expanded to the size of a classroom the nucleus would be about the size of a

Critical mass is

When radium-223 undergoes alpha decay,what other product is formed?

Chemistry

Atoms

Atomic Structure

Chemical Bonds

Chemical Accounting

Gases, Liquids, Solids, and Intermolecular Forces

Acids and Bases

Oxidation and Reduction

Organic Chemistry

Polymers

Chemistry of the Earth

Air

Water

Energy

Biochemistry

Food

Drugs

Fitness and Health

Chemistry Down on the Farm

Household Chemicals

Poisons

Filters