PHY101
Chapter 10 Review
Study of Atomic Physics
Cheryl Dellai

Photons
Photoelectric
Effect
Spectrum
Bohr
Atom
Principles Potpourri
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Photons
$100
What is an electron volt?
ANSWER

Photons
$200
What is a photon?
ANSWER

Photons
$300
What is the energy of a photon?
ANSWER

Photons
$400
An excited atom can lose energy by emitting a
__________.
ANSWER

Photoelectric Effect
$100
The __________ occurs when electrons are emitted when light strikes the surface of a metal.
ANSWER

Photoelectric Effect
$200
An atom is said to have been
________ when it absorbs a photon with sufficient energy to free an electron.
ANSWER

Photoelectric Effect
$300
When the intensity of light is increased in a photoelectric effect experiment, the energy of the emitted electrons __________.
ANSWER

Photoelectric Effect
$400
When the frequency of the light is increased in a photoelectric effect experiment, the energy of the emitted electrons __________.
ANSWER

Spectrum
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When something is restricted to having only certain numerical values, it is said to be __________.
ANSWER

Spectrum
$200
What is a spectrum?
ANSWER

Spectrum
$300
What is an emission spectrum?
ANSWER

Spectrum
$400
A hot luminous solid emits a
__________ spectrum, while a hot luminous gas produces a
__________ spectrum.
ANSWER

Bohr Atom
$100
Two things that are quantized in the Bohr model of the hydrogen atom are
__________ and __________.
ANSWER

Bohr Atom
$200
The lowest energy level in an atom is its __________.
ANSWER

Bohr Atom
$300
What is the formula for the energy levels?
ANSWER

Bohr Atom
$400
In an energy level transition from the n = 2 state to the n =1 state for a hydrogen atom a photon will be ___________.
ANSWER

Principles
$100
The __________ states that a particle cannot be precisely localized.
ANSWER

Principles
$200
What is the de Broglie wavelength ?
ANSWER

Principles
$300
What is the Pauli Exclusion
Principle?
ANSWER

Principles
$400
Two devices that make use of the wavelike nature of electrons are the __________ and the __________.
ANSWER

$100
The person who first explained the photoelectric effect was __________.
ANSWER

$200
Laser light is _____________ &
_______________ .
ANSWER

$300
Four different uses of lasers are
ANSWER

$400
__________ in an x ray spectrum of an atom occurs because of rapid deceleration of the bombarding electrons.
ANSWER

Photons
$100
Answer
What is an electron volt?
One electron through 1 volt of potential difference
1 eV = 1.6 *10 -19 J
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Photons
$200
Answer
What is a photon?
A photon is a wave packet of light.
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Photons
$300
Answer
What is the energy of a photon?
Energy = hf
Planck’s Constant h = 6.63*10 -34 J*s = 4.14 *10 -15 eV*s
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Photons
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Answer
An excited atom can lose energy by emitting a photon.
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Photoelectric Effect
$100
Answer
The Photoelectric Effect occurs when electrons are emitted when light strikes the surface of a metal.
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Photoelectric Effect
$200
Answer
An atom is said to have been ionized when it absorbs a photon with sufficient energy to free an electron.
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Photoelectric Effect
$300
Answer
When the intensity of light is increased in a photoelectric effect experiment, the energy of the emitted electrons stays the same .
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Photoelectric Effect
$400
Answer
When the frequency of the light is increased in a photoelectric effect experiment, the energy of the emitted electrons increases .
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Spectrum
$100
Answer
When something is restricted to having only certain numerical values, it is said to be quantized .
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Spectrum
$200
Answer
What is a spectrum?
A continuous band of colors of the rainbow
R O Y G B I V . Each color blends into the next.
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Spectrum
$300
Answer
What is an emission spectrum?
Colored Lines on a black background.
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Spectrum
$400
Answer
A hot luminous solid emits a continuous spectrum, while a hot luminous gas produces a line spectrum.
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Bohr Atom
$100
Answer
Two things that are quantized in the
Bohr model of the hydrogen atom are energy and angular momentum .
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Bohr Atom
$200
Answer
The lowest energy level in an atom is its ground state .
For Hydrogen E+ = -13.6 eV
The highest energy level in an atom corresponds to n = infinity
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Bohr Atom
$300
Answer
What is the formula for the energy levels?
E n
= E
Ground state
/n² n = principal quantum #
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Bohr Atom
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Answer
In an energy level transition from the n = 2 state to the n =1 state for a hydrogen atom a photon will be emitted .
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Principles
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Answer
The Uncertainty Principle states that a particle cannot be precisely localized.
 x  p  h or  E  t  h
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Principles
$200
Answer
What is the de Broglie wavelength?
 = h/(mv)
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Principles
$300
Answer
What is the Pauli Exclusion Principle?
No two electrons can occupy the same quantum state at the same time . # of states = 2n²
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Principles
$400
Answer
Two devices that make use of the wavelike nature of electrons are the
electron microscope and the scanning tunneling microscope (STM)
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Potpourri $100
Answer
The person who first explained the photoelectric effect was Albert Einstein .
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Potpourri $200
Answer
Laser light is monochromatic
& coherent .
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Potpourri $300
Answer
Principle uses of lasers are
1. to produce holograms,
2. for surgery,
3. to measure accurately distances between objects,
4. in DVD and compact disc players, to cut metals,
5. to induce nuclear fusion reactions,
6. to transmit telephone information along optical fibers,
7. in checkout counter price scanners.
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Potpourri $400
Answer
A continuous variation in an x ray spectrum of an atom occurs because of rapid deceleration of the bombarding electrons.
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