Cutnell/Johnson Physics 7th edition

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Cutnell/JohnsonPhysics 7th edition

• Classroom Response System Questions

Chapter 39 More about Matter Waves
Reading Quiz Questions
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39.2.1. What does the confinement principle
state? a) Confinement leads to
quantization. b) It is very unlikely that a
particle in a potential well can tunnel through
the energy barrier. c) The smaller the volume
of space a particle occupies, the faster it must
move. d) A particle can only be confined in an
infinitely deep potential well. e) It is
impossible to confine a particle in an infinitely
small region.
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39.2.1. What does the confinement principle
state? a) Confinement leads to
quantization. b) It is very unlikely that a
particle in a potential well can tunnel through
the energy barrier. c) The smaller the volume
of space a particle occupies, the faster it must
move. d) A particle can only be confined in an
infinitely deep potential well. e) It is
impossible to confine a particle in an infinitely
small region.
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39.2.2. What is the term used to describe the
least tightly bound electrons of an atom? a)
core electron b) free electron c)
positron d) valence electron e) Cooper
electron
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39.2.2. What is the term used to describe the
least tightly bound electrons of an atom? a)
core electron b) free electron c)
positron d) valence electron e) Cooper
electron
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39.3.1. For an infinitely deep potential well,
what does the quantum number n signify? a) the
total number of electrons involved b) the
number of possible location(s) of the atom(s) c)
the energy level an electron is in d) the
probability density e) the nutation of the atom
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39.3.1. For an infinitely deep potential well,
what does the quantum number n signify? a) the
total number of electrons involved b) the
number of possible location(s) of the atom(s) c)
the energy level an electron is in d) the
probability density e) the nutation of the atom
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39.3.2. Consider an electron trapped in a
one-dimensional trap. Which one of the following
statements correctly describes the lowest energy
level according to the text? a) The lowest
energy such an electron can have is always
negative. b) The lowest energy such an electron
can have is always positive. c) The lowest
energy such an electron can have is zero. d)
The lowest energy such an electron can have may
be positive, negative, or zero. e) The lowest
energy such an electron can have cannot be
calculated.
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39.3.2. Consider an electron trapped in a
one-dimensional trap. Which one of the following
statements correctly describes the lowest energy
level according to the text? a) The lowest
energy such an electron can have is always
negative. b) The lowest energy such an electron
can have is always positive. c) The lowest
energy such an electron can have is zero. d)
The lowest energy such an electron can have may
be positive, negative, or zero. e) The lowest
energy such an electron can have cannot be
calculated.
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39.3.3. What is a quantum jump? a) when an
electron tunnels through a potential barrier b)
when a particle moves from one well to
another c) when an electron changes energy
levels d) when an electron changes from
exhibiting wave-like properties to particle-like
properties e) when a particles speed changes
in quantized amounts
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39.3.3. What is a quantum jump? a) when an
electron tunnels through a potential barrier b)
when a particle moves from one well to
another c) when an electron changes energy
levels d) when an electron changes from
exhibiting wave-like properties to particle-like
properties e) when a particles speed changes
in quantized amounts
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39.3.4. Photons are directed at an electron
within a confined system. Which of the following
correctly describes the requirement for the
energy of a photon if it is to cause the electron
to move from a lower state to a higher state
within the system? a) The energy of the photon
must be must be equal to or larger than the zero
point energy. b) The energy of the photon must
be must be equal to the energy of the lower
state. c) The energy of the photon must be must
be equal to the energy of the higher state. d)
The energy of the photon must be must be smaller
than the energy difference between the initial
and final states. e) The energy of the photon
must be must be equal to the energy difference
between the initial and final states.
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39.3.4. Photons are directed at an electron
within a confined system. Which of the following
correctly describes the requirement for the
energy of a photon if it is to cause the electron
to move from a lower state to a higher state
within the system? a) The energy of the photon
must be must be equal to or larger than the zero
point energy. b) The energy of the photon must
be must be equal to the energy of the lower
state. c) The energy of the photon must be must
be equal to the energy of the higher state. d)
The energy of the photon must be must be smaller
than the energy difference between the initial
and final states. e) The energy of the photon
must be must be equal to the energy difference
between the initial and final states.
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39.3.5. What is the term used for the lowest
energy level of an atom? a) ionization
energy b) nucleation energy c) fermi
level d) ground state e) work function
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39.3.5. What is the term used for the lowest
energy level of an atom? a) ionization
energy b) nucleation energy c) fermi
level d) ground state e) work function
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39.4.1. What does the correspondence principle
state? a) For every action, there is a
corresponding force. b) When quantum numbers
become very large, classical and quantum physics
merge. c) Matter waves and electromagnetic
waves correspond to each other at the level of
very small quantum numbers. d) A particle
trapped inside an infinitely deep potential well
will have quantized energy states. e) In
quantum mechanics, matter and energy are
indistinguishable.
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39.4.1. What does the correspondence principle
state? a) For every action, there is a
corresponding force. b) When quantum numbers
become very large, classical and quantum physics
merge. c) Matter waves and electromagnetic
waves correspond to each other at the level of
very small quantum numbers. d) A particle
trapped inside an infinitely deep potential well
will have quantized energy states. e) In
quantum mechanics, matter and energy are
indistinguishable.
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39.4.2. Consider an electron trapped in a
one-dimensional, infinitely deep potential energy
well. Which of the following statements
concerning the value of the wavefunction of the
electron at the walls of the well must be
true? a) The value must be negative. b) The
value must be positive. c) The value must be
complex. d) The value must be zero. e) The
value will vary depending on the quantum number n.
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39.4.2. Consider an electron trapped in a
one-dimensional, infinitely deep potential energy
well. Which of the following statements
concerning the value of the wavefunction of the
electron at the walls of the well must be
true? a) The value must be negative. b) The
value must be positive. c) The value must be
complex. d) The value must be zero. e) The
value will vary depending on the quantum number n.
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39.4.3. Which of the following statements
concerning an electron at its lowest energy state
within a one-dimensional, infinitely deep
potential well is true? a) The electron is
least likely to be near the walls of the
well. b) The electron is least likely to be at
the center of the well. c) The electron is
least likely to be found between the center and a
wall. d) The electron is equally likely to be
found anywhere in the well. e) The electron is
least likely to be found anywhere in the well.
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39.4.3. Which of the following statements
concerning an electron at its lowest energy state
within a one-dimensional, infinitely deep
potential well is true? a) The electron is
least likely to be near the walls of the
well. b) The electron is least likely to be at
the center of the well. c) The electron is
least likely to be found between the center and a
wall. d) The electron is equally likely to be
found anywhere in the well. e) The electron is
least likely to be found anywhere in the well.
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39.4.4. What is the zero-point energy? a) The
smallest amount of energy that any particle can
have in the Universe is called the zero-point
energy. b) The smallest energy that an electron
confined within an atom is zero joules, which is
the zero point energy. c) The energy that an
electron has at the walls of a potential barrier
is called the zero-point energy. d) Particles
in confined systems have a minimum amount of
energy that is not equal to zero, which is called
the zero-point energy. e) The energy that an
electron has at the center of a potential well is
called the zero-point energy.
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39.4.4. What is the zero-point energy? a) The
smallest amount of energy that any particle can
have in the Universe is called the zero-point
energy. b) The smallest energy that an electron
confined within an atom is zero joules, which is
the zero point energy. c) The energy that an
electron has at the walls of a potential barrier
is called the zero-point energy. d) Particles
in confined systems have a minimum amount of
energy that is not equal to zero, which is called
the zero-point energy. e) The energy that an
electron has at the center of a potential well is
called the zero-point energy.
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39.4.5. What is the purpose of normalizing a wave
function? a) so all wave functions can be
compared with each other b) so the probability
density is not a complex number c) so the wave
function is never negative d) so the
probability of finding the particle is one
hundred percent e) so the wave function is
positive and never equal to zero
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39.4.5. What is the purpose of normalizing a wave
function? a) so all wave functions can be
compared with each other b) so the probability
density is not a complex number c) so the wave
function is never negative d) so the
probability of finding the particle is one
hundred percent e) so the wave function is
positive and never equal to zero
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39.4.6. The square of what parameter indicates
the probability of locating a particle within a
region of space? a) momentum b) wave
function c) wavelength d) energy e) spin
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39.4.6. The square of what parameter indicates
the probability of locating a particle within a
region of space? a) momentum b) wave
function c) wavelength d) energy e) spin
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39.5.1. Which of the following statements
concerning an electron in the n 2 state within
a one-dimensional, finite potential well is
true? a) The electron is least likely to be
near the walls of the well. b) The electron is
least likely to be at the center of the well. c)
The electron is least likely to be found between
the center and a wall. d) The electron is
equally likely to be found anywhere in the
well. e) The electron is least likely to be
found anywhere in the well.
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39.5.1. Which of the following statements
concerning an electron in the n 2 state within
a one-dimensional, finite potential well is
true? a) The electron is least likely to be
near the walls of the well. b) The electron is
least likely to be at the center of the well. c)
The electron is least likely to be found between
the center and a wall. d) The electron is
equally likely to be found anywhere in the
well. e) The electron is least likely to be
found anywhere in the well.
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39.6.1. Several artificial electron traps are
described in the text. Which one of the
following choices is not discussed in the
text? a) quantum dot b) quantum corral c)
superlattice d) nanocrystallite
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39.6.1. Several artificial electron traps are
described in the text. Which one of the
following choices is not discussed in the
text? a) quantum dot b) quantum corral c)
superlattice d) nanocrystallite
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39.8.1. Which one of the following choice is an
assumption Bohr made in formulating his atomic
model? a) Electron energies are quantized. b)
The linear momentum of the electron is
quantized. c) The angular momentum of the
electron is quantized. d) The ground state
energy of the hydrogen atom is ?13.60 eV. e)
Electrons may be found anywhere in the atom.
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39.8.1. Which one of the following choice is an
assumption Bohr made in formulating his atomic
model? a) Electron energies are quantized. b)
The linear momentum of the electron is
quantized. c) The angular momentum of the
electron is quantized. d) The ground state
energy of the hydrogen atom is ?13.60 eV. e)
Electrons may be found anywhere in the atom.
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39.8.2. The Bohr model successfully predicted
which one of the following parameters? a) The
values of the energy levels of the hydrogen
atom. b) The radius of the nucleus of the
hydrogen atom. c) The size of an electron. d)
The electric potential of an electron. e) The
number of neutrons in a given atom.
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39.8.2. The Bohr model successfully predicted
which one of the following parameters? a) The
values of the energy levels of the hydrogen
atom. b) The radius of the nucleus of the
hydrogen atom. c) The size of an electron. d)
The electric potential of an electron. e) The
number of neutrons in a given atom.
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39.8.3. What was the contribution of Johann
Balmer in the study of atomic spectra? a) He
discovered new lines for the hydrogen spectrum
located in the ultraviolet region. b) He found
a relationship between an empirical formula for
hydrogens atomic spectra to Bohrs model of the
atom. c) He found an empirical equation that
gave the values of the observed visible
wavelengths of the hydrogen spectrum. d) By
studying the solar absorption spectrum, he
discovered the element hydrogen. e) By studying
atomic spectra, he discovered that every element
has a unique spectrum.
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39.8.3. What was the contribution of Johann
Balmer in the study of atomic spectra? a) He
discovered new lines for the hydrogen spectrum
located in the ultraviolet region. b) He found
a relationship between an empirical formula for
hydrogens atomic spectra to Bohrs model of the
atom. c) He found an empirical equation that
gave the values of the observed visible
wavelengths of the hydrogen spectrum. d) By
studying the solar absorption spectrum, he
discovered the element hydrogen. e) By studying
atomic spectra, he discovered that every element
has a unique spectrum.
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39.8.4. Which one of the following statements is
not part of the Bohr model of the atom? a)
Electrons emit electromagnetic radiation as they
orbit in stationary states. b) The structure of
the atom is that there is a very small,
positively charged nucleus surrounded by
electrons. c) The radii for Bohr orbits depends
on the number of protons in the nucleus. d)
Electrons move in circular orbits. e) A photon
is emitted when an electron drops from a higher
energy orbit to a lower energy orbit.
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39.8.4. Which one of the following statements is
not part of the Bohr model of the atom? a)
Electrons emit electromagnetic radiation as they
orbit in stationary states. b) The structure of
the atom is that there is a very small,
positively charged nucleus surrounded by
electrons. c) The radii for Bohr orbits depends
on the number of protons in the nucleus. d)
Electrons move in circular orbits. e) A photon
is emitted when an electron drops from a higher
energy orbit to a lower energy orbit.
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39.8.5. How many quantum numbers did Bohr use in
his model to identify the various electron
orbits? a) 0 b) 1 c) 2 d) 3 e) 4
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39.8.5. How many quantum numbers did Bohr use in
his model to identify the various electron
orbits? a) 0 b) 1 c) 2 d) 3 e) 4
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39.9.1. What causes the potential well of a
hydrogen atom? a) the zero-point energy of the
atom b) the quantization of the electrons
angular momentum c) the electrostatic
attraction of the electron and proton d) the
confinement of the electron to the atomic
orbitals e) the magnetic interaction between
the spin angular momentum of the proton and the
electron
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39.9.1. What causes the potential well of a
hydrogen atom? a) the zero-point energy of the
atom b) the quantization of the electrons
angular momentum c) the electrostatic
attraction of the electron and proton d) the
confinement of the electron to the atomic
orbitals e) the magnetic interaction between
the spin angular momentum of the proton and the
electron
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39.9.2. Which one of the following choices is not
a quantum number? a) orbital magnetic quantum
number b) principal quantum number c) shell
quantum number d) orbital quantum number
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39.9.2. Which one of the following choices is not
a quantum number? a) orbital magnetic quantum
number b) principal quantum number c) shell
quantum number d) orbital quantum number
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39.9.3. Which one of the following quantum
numbers determines the total energy of an
atom? a) spin quantum number b) magnetic
quantum number c) orbital quantum number d)
principal quantum number
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39.9.3. Which one of the following quantum
numbers determines the total energy of an
atom? a) spin quantum number b) magnetic
quantum number c) orbital quantum number d)
principal quantum number
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39.9.4. Which series of lines in the hydrogen
line spectrum involves electrons making a
transition from higher energy levels down to the
lowest energy level? a) Balmer series b)
Lyman series c) Paschen series d) Brackett
series e) Pfund series
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39.9.4. Which series of lines in the hydrogen
line spectrum involves electrons making a
transition from higher energy levels down to the
lowest energy level? a) Balmer series b)
Lyman series c) Paschen series d) Brackett
series e) Pfund series