Question 1

Which shape uses the smallest amount of material when creating a critical mass?

Accepted Answer

A)   cone
B)   cube
C)   sphere
D)   elongated box
E)   none of these

Question 2

When U-239 emits a beta particle, the nucleus left behind has

Accepted Answer

A)   91 protons.
B)   92 protons.
C)   90 protons.
D)   93 protons.
E)   94 protons.

Question 3

Compared to the mass of a uranium nucleus before splitting, the pieces it splits into have

Accepted Answer

A)   more mass.
B)   the same mass.
C)   less mass.

Question 4

The end result of radioactive decay can be a different

Accepted Answer

A)   element.
B)   atom.
C)   isotope.
D)   all of these
E)   none of these

Question 5

A chain reaction grows when the average number of liberated neutrons which go on to cause further fissions is

Accepted Answer

A)   less than one.
B)   greater than one.
C)   zero.
D)   one.

Question 6

X-rays may be regarded as

Accepted Answer

A)   high frequency radio waves.
B)   high frequency sound waves.
C)   both of these
D)   none of these

Question 7

Different isotopes of an element have different numbers of

Accepted Answer

A)   hadrons.
B)   photons.
C)   protons.
D)   neutrons.
E)   none of these

Question 8

A nucleon has more potential energy with respect to a nucleus when it is

Accepted Answer

A)   inside the nucleus.
B)   outside the nucleus.
C)   both the same

Question 9

When two light atoms fuse together, mass

Accepted Answer

A)   is created from energy of other forms.
B)   is converted to kinetic energy of neutrons.
C)   remains the same.
D)   is gained.

Question 10

Compared to the energy produced by fissioning a gram of uranium, the energy produced by fusing a gram of deuterium is

Accepted Answer

A)   more.
B)   less.
C)   the same.

Question 11

The mass of a nucleon is greatest where its potential energy is

Accepted Answer

A)   least.
B)   greatest.

Question 12

Electric forces within an atomic nucleus tend to

Accepted Answer

A)   hold it together.
B)   push it apart.
C)   neither of these

Question 13

When a nucleus emits a positron, its atomic number

Accepted Answer

A)   decreases by 1.
B)   increases by 1.
C)   doesn't change.

Question 14

An element emits 1 alpha particle, 1 positron, and 3 beta particles. Its atomic number

Accepted Answer

A)   increases by 1.
B)   decreases by 2.
C)   stays the same.
D)   increases by 2.
E)   decreases by 1.

Question 15

An element will decay to an element with higher atomic number in the periodic table if it emits

Accepted Answer

A)   a proton.
B)   a beta particle.
C)   an alpha particle.
D)   a gamma ray.
E)   none of these

Question 16

Three isotopes that undergo nuclear fission are

Accepted Answer

A)   U-233, U-235, Pu-239.
B)   Th-238, U-235, Pu-239.
C)   Th-235, U-235, Pu-239.
D)   Th-239, U-235, Pu-239.
E)   none of these

Question 17

When a nucleus emits a beta particle, its atomic number

Accepted Answer

A)   changes, but its mass number remains constant.
B)   remains constant, and so does its mass number.
C)   remains constant, but its mass number changes.
D)   changes, and so does its mass number.
E)   none of these

Question 18

When radium (A = 88)  emits an alpha particle, the resulting nucleus has atomic number

Accepted Answer

A)   88.
B)   92.
C)   86.
D)   90.
E)   none of these

Question 19

In a breeder reactor

Accepted Answer

A)   uranium is converted into plutonium.
B)   plutonium is converted into uranium.
C)   both of these
D)   neither of these

Question 20

The fate of the world's uranium supply is to eventually become

Accepted Answer

A)   alpha and beta particles.
B)   lead.
C)   iron.

Exam 16: The Atomic Nucleus and Radioactivity

When a nucleus emits a positron, its atomic number

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Compared to the energy produced by fissioning a gram of uranium, the energy produced by fusing a gram of deuterium is

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In a breeder reactor

Correct AnswerverifiedShow Answer

When two light atoms fuse together, mass

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The fate of the world's uranium supply is to eventually become

Correct AnswerverifiedShow Answer

The end result of radioactive decay can be a different

Correct AnswerverifiedShow Answer

Different isotopes of an element have different numbers of

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An element emits 1 alpha particle, 1 positron, and 3 beta particles. Its atomic number

Correct AnswerverifiedShow Answer

When U-239 emits a beta particle, the nucleus left behind has

Correct AnswerverifiedShow Answer

When radium (A = 88) emits an alpha particle, the resulting nucleus has atomic number

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Three isotopes that undergo nuclear fission are

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A nucleon has more potential energy with respect to a nucleus when it is

Correct AnswerverifiedShow Answer

Which shape uses the smallest amount of material when creating a critical mass?

Correct AnswerverifiedShow Answer

X-rays may be regarded as

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The mass of a nucleon is greatest where its potential energy is

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An element will decay to an element with higher atomic number in the periodic table if it emits

Correct AnswerverifiedShow Answer

Compared to the mass of a uranium nucleus before splitting, the pieces it splits into have

Correct AnswerverifiedShow Answer

A chain reaction grows when the average number of liberated neutrons which go on to cause further fissions is

Correct AnswerverifiedShow Answer

Electric forces within an atomic nucleus tend to

Correct AnswerverifiedShow Answer

When a nucleus emits a beta particle, its atomic number

Correct AnswerverifiedShow Answer

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