Question 1

The energy difference between adjacent energy levels in an atom

Accepted Answer

A) is the same for all quantum numbers. 
B) is smaller for small quantum numbers. 
C) is larger for large quantum numbers. 
D) shows no regularity. 
A) is the same for all quantum numbers. 
B) is smaller for small quantum numbers. 
C) is larger for large quantum numbers. 
D) shows no regularity.

Question 2

According to the uncertainty principle, it is impossible to precisely determine

Accepted Answer

A) only the position of a particle. 
B) only the momentum of a particle. 
C) either the position or the momentum of a particle. 
D) both the position and the momentum of a particle. 
A) only the position of a particle. 
B) only the momentum of a particle. 
C) either the position or the momentum of a particle. 
D) both the position and the momentum of a particle.

Question 3

The fact that no two electrons in an atom can have the same set of quantum numbers is known as the

Accepted Answer

A) Bohr principle. 
B) de Broglie principle. 
C) exclusion principle. 
D) uncertainty principle. 
A) Bohr principle. 
B) de Broglie principle. 
C) exclusion principle. 
D) uncertainty principle.

Question 4

Most stars are hot objects surrounded by cooler atmospheres.The spectrum of such a star is a

Accepted Answer

A) continuous band of light. 
B) band of light crossed by brighter lines. 
C) band of light crossed by dark lines. 
D) series of bright lines. 
A) continuous band of light. 
B) band of light crossed by brighter lines. 
C) band of light crossed by dark lines. 
D) series of bright lines.

Question 5

Matter waves are

Accepted Answer

A) associated with all particles. 
B) never associated with stationary particles. 
C) never associated with charged particles. 
D) never associated with uncharged particles. 
A) associated with all particles. 
B) never associated with stationary particles. 
C) never associated with charged particles. 
D) never associated with uncharged particles.

Question 6

A lamp emits light of frequency 5 * 1015 Hz at a power of 25 W and Planck's constant is 6.6 * 10-34 J·s.The number of photons given off per second is

Accepted Answer

A) 1.3 * 10-19. 
B) 8.3 * 10-17. 
C) 7.6 * 1018. 
D) 1.9 * 1050. 
A) 1.3 * 10-19. 
B) 8.3 * 10-17. 
C) 7.6 * 1018. 
D) 1.9 * 1050.

Question 7

The narrower the wave packet of a particle is, the

Accepted Answer

A) longer its wavelength. 
B) more precisely its position can be established. 
C) more precisely its momentum can be established. 
D) more precisely its energy can be established. 
A) longer its wavelength. 
B) more precisely its position can be established. 
C) more precisely its momentum can be established. 
D) more precisely its energy can be established.

Question 8

Which one or more of the following events can raise an atom from its ground state to an excited state?

Accepted Answer

A) spontaneous emission of a photon 
B) induced emission of a photon 
C) absorption of a photon 
D) a collision with another atom 
E) Both C and D 
A) spontaneous emission of a photon 
B) induced emission of a photon 
C) absorption of a photon 
D) a collision with another atom 
E) Both C and D

Question 9

Which of the following electron jumps in a hydrogen atom absorbs the photon of highest frequency?

Accepted Answer

A) n = 1 to n = 2 
B) n = 2 to n = 1 
C) n = 2 to n = 3 
D) n = 3 to n = 2 
A) n = 1 to n = 2 
B) n = 2 to n = 1 
C) n = 2 to n = 3 
D) n = 3 to n = 2

Question 10

Which of the following electron jumps in a hydrogen atom emits the photon of highest frequency?

Accepted Answer

A) n = 1 to n = 2 
B) n = 2 to n = 1 
C) n = 2 to n = 3 
D) n = 3 to n = 2 
A) n = 1 to n = 2 
B) n = 2 to n = 1 
C) n = 2 to n = 3 
D) n = 3 to n = 2

Question 11

The number of quantum numbers needed to determine the size and shape of the probability cloud of an atomic electron is

Accepted Answer

A) 1. 
B) 2. 
C) 3. 
D) 4. 
A) 1. 
B) 2. 
C) 3. 
D) 4.

Question 12

A beam of light whose waves are all in step with one another is said to be

Accepted Answer

A) coherent. 
B) incoherent. 
C) quantized. 
D) diffracted. 
A) coherent. 
B) incoherent. 
C) quantized. 
D) diffracted.

Question 13

Planck's constant is 6.6 * 10-34 J·s and the proton mass is 1.7 * 10-27 kg.The speed of a proton whose de Broglie wavelength is 4.0 * 107 m is

Accepted Answer

A) 7.8 * 10-20 m/s. 
B) 9.9 * 102 m/s. 
C) 1.9 * 106 m/s. 
D) 3.9 * 106 m/s. 
A) 7.8 * 10-20 m/s. 
B) 9.9 * 102 m/s. 
C) 1.9 * 106 m/s. 
D) 3.9 * 106 m/s.

Question 14

An atom in an excited state usually emits a photon and falls to a state of lower energy m about

Accepted Answer

A) 10-8 s. 
B) 1 s. 
C) 10 s. 
D) 1 min. 
A) 10-8 s. 
B) 1 s. 
C) 10 s. 
D) 1 min.

Question 15

An increase in the voltage applied to an X-ray tube causes an increase in the X-rays'

Accepted Answer

A) wavelength. 
B) speed. 
C) energy. 
D) number. 
A) wavelength. 
B) speed. 
C) energy. 
D) number.

Question 16

Which one or more of the following can be explained by the quantum theory of light?

Accepted Answer

A) interference 
B) diffraction 
C) the photoelectric effect 
D) matter waves 
A) interference 
B) diffraction 
C) the photoelectric effect 
D) matter waves

Question 17

Each probability cloud in an atom can be occupied by

Accepted Answer

A) only one electron. 
B) two electrons with spins in the same direction. 
C) two electrons with spins in opposite directions. 
D) any number of electrons. 
A) only one electron. 
B) two electrons with spins in the same direction. 
C) two electrons with spins in opposite directions. 
D) any number of electrons.

Question 18

A neon sign does not produce

Accepted Answer

A) a line spectrum. 
B) an emission spectrum. 
C) an absorption spectrum. 
D) photons. 
A) a line spectrum. 
B) an emission spectrum. 
C) an absorption spectrum. 
D) photons.

Question 19

The number of values the spin magnetic quantum number ms of an atomic electron can have is

Accepted Answer

A) 1. 
B) 2. 
C) always equal to n, the principal quantum number. 
D) always equal to 2n. 
A) 1. 
B) 2. 
C) always equal to n, the principal quantum number. 
D) always equal to 2n.

Question 20

An electron and a gamma ray have the same wavelength.

Accepted Answer

A) The electron has less energy than the photon energy of the gamma ray. 
B) The electron has the same energy as the photon energy of the gamma ray. 
C) The electron has more energy than the photon energy of the gamma ray. 
D) Any of these choices could be correct, depending on the wavelength. 
A) The electron has less energy than the photon energy of the gamma ray. 
B) The electron has the same energy as the photon energy of the gamma ray. 
C) The electron has more energy than the photon energy of the gamma ray. 
D) Any of these choices could be correct, depending on the wavelength.

The energy difference between adjacent energy levels in an atom

According to the uncertainty principle, it is impossible to precisely determine

The fact that no two electrons in an atom can have the same set of quantum numbers is known as the

Most stars are hot objects surrounded by cooler atmospheres.The spectrum of such a star is a

Matter waves are

A lamp emits light of frequency 5 * 10¹⁵ Hz at a power of 25 W and Planck's constant is 6.6 * 10^-34 J·s.The number of photons given off per second is

The narrower the wave packet of a particle is, the

Which one or more of the following events can raise an atom from its ground state to an excited state?

Which of the following electron jumps in a hydrogen atom absorbs the photon of highest frequency?

Which of the following electron jumps in a hydrogen atom emits the photon of highest frequency?

The number of quantum numbers needed to determine the size and shape of the probability cloud of an atomic electron is

A beam of light whose waves are all in step with one another is said to be

Planck's constant is 6.6 * 10^-34 J·s and the proton mass is 1.7 * 10^-27 kg.The speed of a proton whose de Broglie wavelength is 4.0 * 10⁷ m is

An atom in an excited state usually emits a photon and falls to a state of lower energy m about

An increase in the voltage applied to an X-ray tube causes an increase in the X-rays'

Which one or more of the following can be explained by the quantum theory of light?

Each probability cloud in an atom can be occupied by

A neon sign does not produce

The number of values the spin magnetic quantum number m_s of an atomic electron can have is

An electron and a gamma ray have the same wavelength.

The Scientific Method

Motion

Energy

Energy and the Future

Matter and Heat

Electricity and Magnetism

Waves

The Nucleus

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

Universe

Filters

Exam 9: The Atom

The energy difference between adjacent energy levels in an atom

According to the uncertainty principle, it is impossible to precisely determine

The fact that no two electrons in an atom can have the same set of quantum numbers is known as the

Most stars are hot objects surrounded by cooler atmospheres.The spectrum of such a star is a

Matter waves are

A lamp emits light of frequency 5 * 1015 Hz at a power of 25 W and Planck's constant is 6.6 * 10-34 J·s.The number of photons given off per second is

The narrower the wave packet of a particle is, the

Which one or more of the following events can raise an atom from its ground state to an excited state?

Which of the following electron jumps in a hydrogen atom absorbs the photon of highest frequency?

Which of the following electron jumps in a hydrogen atom emits the photon of highest frequency?

The number of quantum numbers needed to determine the size and shape of the probability cloud of an atomic electron is

A beam of light whose waves are all in step with one another is said to be

Planck's constant is 6.6 * 10-34 J·s and the proton mass is 1.7 * 10-27 kg.The speed of a proton whose de Broglie wavelength is 4.0 * 107 m is

An atom in an excited state usually emits a photon and falls to a state of lower energy m about

An increase in the voltage applied to an X-ray tube causes an increase in the X-rays'

Which one or more of the following can be explained by the quantum theory of light?

Each probability cloud in an atom can be occupied by

A neon sign does not produce

The number of values the spin magnetic quantum number ms of an atomic electron can have is

An electron and a gamma ray have the same wavelength.

The Scientific Method

Motion

Energy

Energy and the Future

Matter and Heat

Electricity and Magnetism

Waves

The Nucleus

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

Universe

Filters

A lamp emits light of frequency 5 * 10¹⁵ Hz at a power of 25 W and Planck's constant is 6.6 * 10^-34 J·s.The number of photons given off per second is

Planck's constant is 6.6 * 10^-34 J·s and the proton mass is 1.7 * 10^-27 kg.The speed of a proton whose de Broglie wavelength is 4.0 * 10⁷ m is

The number of values the spin magnetic quantum number m_s of an atomic electron can have is