Question 1

Electrons in atoms

Accepted Answer

A)  orbit the nucleus in well-defined circular orbits.
B)  radiate electromagnetic energy continuously.
C)  act as if spread out in a "cloud" around the nucleus.
D)  behave as predicted by quantum mechanics.E) C) and D)
F) B) and D)

Question 2

In the Bohr model of the hydrogen atom both the energy and orbital angular momentum of the electron are quantized.

Accepted Answer

A) True 
 B)False  True

Question 3

Photocopiers make use of the photoelectric effect.

Accepted Answer

A) True 
 B)False

Question 4

When the speed of an electron is increased the de Broglie wavelength is decreased.

Accepted Answer

A) True 
 B)False  True

Question 5

The person who expounded the uncertainty principle was

Accepted Answer

A)  Max Planck.
B)  Albert Einstein.
C)  Neils Bohr.
D)  Erwin Schrödinger.
E)  Werner Heisenberg.F) B) and E)
G) A) and B)

Question 6

The peak of the radiation curve of a blackbody moves upward toward higher intensity as its temperature __________.

Accepted Answer

The answer of The peak of the radiation curve of...

Question 7

The energy level diagram for hydrogen 
-The ionization energy of hydrogen is 13.6 eV.

Accepted Answer

A) True 
 B)False

Question 8

When the frequency of the light is increased in a photoelectric effect experiment,the energy of the emitted electrons increases.

Accepted Answer

A) True 
 B)False

Question 9

​Match each item with the correct statement below.
-causes an electron to make a transition to a higher energy level

Accepted Answer

A)  ​angular momentum
B)  ​de Broglie wavelength
C)  ​emission spectrum
D)  ​energy
E)  ​ground stateF) ​hologramG) ​laserH) ​photoelectric effectI) ​photonJ) ​photon absorptionK) ​photon emissionL) ​uncertainty principleM) ​wave functionN) F) and G)
O) G) and I)

Question 10

The characteristic peaks in an x-ray spectrum of an atom occur because of rapid deceleration of the bombarding electrons.

Accepted Answer

A) True 
 B)False

Question 11

The peak of the radiation curve of a blackbody moves upward toward higher intensity as its temperature increases.

Accepted Answer

A) True 
 B)False

Question 12

The energy of an oscillating atom in a blackbody can be any value within a certain limited range.

Accepted Answer

A) True 
 B)False  False

Question 13

Find the energy of a photon whose frequency is 5 × 1012 Hz.

Accepted Answer

Question 14

The photoelectric effect occurs when electrons are emitted when light strikes the surface of a metal.

Accepted Answer

A) True 
 B)False

Question 15

In a laser

Accepted Answer

A)  light is amplified by stimulated emission of radiation.
B)  the emitted light is monochromatic.
C)  the emitted light is coherent.
D)  there is a population inversion of electrons in atoms.
E)  all of the aboveF) C) and E)
G) D) and E)

Question 16

The chemical composition of stars can be determined from lines in their spectra.

Accepted Answer

A) True 
 B)False

Question 17

According to the Pauli Exclusion Principle for n = 4,the occupation limit of electrons is:

Accepted Answer

The answer of According to the Pauli Exclusion Principle for...

Question 18

If the speed of an electron increases,its de Broglie wavelength

Accepted Answer

A)  increases.
B)  decreases.
C)  stays the same.
D)  may increase or decrease.E) A) and D)
F) B) and C)

Question 19

A quantum of electromagnetic radiation is a

Accepted Answer

A)  wave function.
B)  photon.
C)  de Broglie wave.
D)  laser.
E)  hologram.F) A) and C)
G) A) and B)

Question 20

The lowest energy level in an atom is its

Accepted Answer

A)  ionization level.
B)  emission level.
C)  absorption level.
D)  photon level.
E)  ground state.F) D) and E)
G) None of the above

Exam 10: Atomic Physics

Electrons in atoms

Correct AnswerverifiedShow Answer

In the Bohr model of the hydrogen atom both the energy and orbital angular momentum of the electron are quantized.

Correct AnswerverifiedTrue

Photocopiers make use of the photoelectric effect.

Correct AnswerverifiedShow Answer

When the speed of an electron is increased the de Broglie wavelength is decreased.

Correct AnswerverifiedTrue

The person who expounded the uncertainty principle was

Correct AnswerverifiedShow Answer

The peak of the radiation curve of a blackbody moves upward toward higher intensity as its temperature __________.

Correct AnswerverifiedShow Answer

The energy level diagram for hydrogen -The ionization energy of hydrogen is 13.6 eV.

Correct AnswerverifiedShow Answer

When the frequency of the light is increased in a photoelectric effect experiment,the energy of the emitted electrons increases.

Correct AnswerverifiedShow Answer

​Match each item with the correct statement below. -causes an electron to make a transition to a higher energy level

Correct AnswerverifiedShow Answer

The characteristic peaks in an x-ray spectrum of an atom occur because of rapid deceleration of the bombarding electrons.

Correct AnswerverifiedShow Answer

The peak of the radiation curve of a blackbody moves upward toward higher intensity as its temperature increases.

Correct AnswerverifiedShow Answer

The energy of an oscillating atom in a blackbody can be any value within a certain limited range.

Correct AnswerverifiedFalse

Find the energy of a photon whose frequency is 5 × 1012 Hz.

Correct AnswerverifiedShow Answer

The photoelectric effect occurs when electrons are emitted when light strikes the surface of a metal.

Correct AnswerverifiedShow Answer

In a laser

Correct AnswerverifiedShow Answer

The chemical composition of stars can be determined from lines in their spectra.

Correct AnswerverifiedShow Answer

According to the Pauli Exclusion Principle for n = 4,the occupation limit of electrons is:

Correct AnswerverifiedShow Answer

If the speed of an electron increases,its de Broglie wavelength

Correct AnswerverifiedShow Answer

A quantum of electromagnetic radiation is a

Correct AnswerverifiedShow Answer

The lowest energy level in an atom is its

Correct AnswerverifiedShow Answer

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True

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True

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Match each item with the correct statement below. -causes an electron to make a transition to a higher energy level

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False

Find the energy of a photon whose frequency is 5 × 10¹² Hz.

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