Question 1

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 2

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 3

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

Accepted Answer

A)   least.
B)   greatest.

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

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 6

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 7

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 8

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 9

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 10

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

Accepted Answer

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

Question 11

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 12

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 13

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 14

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 15

When a nucleus emits a positron, its atomic number

Accepted Answer

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

Question 16

Electric forces within an atomic nucleus tend to

Accepted Answer

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

Question 17

Different isotopes of an element have different numbers of

Accepted Answer

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

Question 18

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 19

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 20

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.

Exam 16: The Atomic Nucleus and Radioactivity

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

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

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The end result of radioactive decay can be a different

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When two light atoms fuse together, mass

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

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

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

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

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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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Different isotopes of an element have different numbers of

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Electric forces within an atomic nucleus tend to

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When a nucleus emits a beta particle, its atomic number

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

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When a nucleus emits a positron, its atomic number

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

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X-rays may be regarded as

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In a breeder reactor

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

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

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Three isotopes that undergo nuclear fission are

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