Question 1

The wavelengths in the various spectral series of an element

Accepted Answer

A) are the same for all elements. 
B) are random. 
C) are different for each element. 
D) are different in the emission and absorption spectra of an element. 
A) are the same for all elements. 
B) are random. 
C) are different for each element. 
D) are different in the emission and absorption spectra of an element.

Question 2

The orbital of an electron in an atom is

Accepted Answer

A) the region around the nucleus in which it is most likely to be found. 
B) the path it follows around the nucleus. 
C) its de Broglie wave. 
D) its angular momentum. 
A) the region around the nucleus in which it is most likely to be found. 
B) the path it follows around the nucleus. 
C) its de Broglie wave. 
D) its angular momentum.

Question 3

Planck's constant is h = 6.6 * 10-34 Js.Light of wavelength 5 * 10-7 m consists of photons whose energy is

Accepted Answer

A) 1.1 * 10-48 J. 
B) 1.3 * 10-27 J. 
C) 4 * 10-19 J. 
D) 1.7 * 10-15 J. 
A) 1.1 * 10-48 J. 
B) 1.3 * 10-27 J. 
C) 4 * 10-19 J. 
D) 1.7 * 10-15 J.

Question 4

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 5

The photoelectric effect occurs only when the incident light has more than a certain minimum

Accepted Answer

A) frequency. 
B) wavelength. 
C) speed. 
D) charge. 
A) frequency. 
B) wavelength. 
C) speed. 
D) charge.

Question 6

Planck's constant is h = 6.6 * 10-34 Js and the electron mass is 9.1 * 10-31 kg.The speed of an electron whose de Broglie wavelength is 10-10 is

Accepted Answer

A) 6.6 * 10-24 m/s. 
B) 3.8 * 103 m/s. 
C) 7.3 * 106 m/s. 
D) 1010 m/s. 
A) 6.6 * 10-24 m/s. 
B) 3.8 * 103 m/s. 
C) 7.3 * 106 m/s. 
D) 1010 m/s.

Question 7

The speed of a photon

Accepted Answer

A) is less than the speed of light. 
B) is equal to the speed of light. 
C) is greater than the speed of light. 
D) Any of these choices could be correct, depending on its frequency. 
A) is less than the speed of light. 
B) is equal to the speed of light. 
C) is greater than the speed of light. 
D) Any of these choices could be correct, depending on its frequency.

Question 8

When light is directed at a metal surface, the emitted electrons

Accepted Answer

A) are called photons. 
B) have random energies. 
C) have energies that depend upon the intensity of the light. 
D) have energies that depend upon the frequency of the light. 
A) are called photons. 
B) have random energies. 
C) have energies that depend upon the intensity of the light. 
D) have energies that depend upon the frequency of the light.

Question 9

A proton and an electron have the same de Broglie wavelength.

Accepted Answer

A) The electron has the higher speed. 
B) The proton has the higher speed. 
C) They have the same speed. 
D) Any of the choices is true, depending on the wavelength. 
A) The electron has the higher speed. 
B) The proton has the higher speed. 
C) They have the same speed. 
D) Any of the choices is true, depending on the wavelength.

Question 10

Each orbital 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 11

The electron structures of atoms never emit

Accepted Answer

A) gamma rays. 
B) x-rays. 
C) ultraviolet light. 
D) infrared light. 
A) gamma rays. 
B) x-rays. 
C) ultraviolet light. 
D) infrared light.

Question 12

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 13

The number of quantum numbers needed to determine the size and shape of an atomic orbital is

Accepted Answer

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

Question 14

Planck's constant is h = 6.6 * 10-34 Js.An x-ray photon has an energy of 6.6 * 10-15 J.The frequency that corresponds to this energy is

Accepted Answer

A) 4.4 * 10-48 Hz. 
B) 10-19 Hz. 
C) 1015 Hz. 
D) 1019 Hz. 
A) 4.4 * 10-48 Hz. 
B) 10-19 Hz. 
C) 1015 Hz. 
D) 1019 Hz.

Question 15

If Planck's constant were smaller than it is,

Accepted Answer

A) moving bodies would have longer wavelengths. 
B) moving bodies would have lower speeds. 
C) the uncertainty principle would be less significant. 
D) photons would have higher energies. 
A) moving bodies would have longer wavelengths. 
B) moving bodies would have lower speeds. 
C) the uncertainty principle would be less significant. 
D) photons would have higher energies.

Question 16

In order to increase the rate at which photoelectrons are emitted by a surface on which light is directed, it is necessary to increase the

Accepted Answer

A) frequency of the light. 
B) wavelength of the light. 
C) intensity of the light. 
D) speed of the light. 
A) frequency of the light. 
B) wavelength of the light. 
C) intensity of the light. 
D) speed of the light.

Question 17

Which of these statements is true for the radiation emitted by all objects?

Accepted Answer

A) Under the same circumstances, black objects emit the least radiation. 
B) The higher an object's temperature, the longer the predominant wavelength of its radiation. 
C) The higher an object's temperature, the more radiation it emits. 
D) The higher an object's temperature, the higher the speed of the radiation it emits. 
A) Under the same circumstances, black objects emit the least radiation. 
B) The higher an object's temperature, the longer the predominant wavelength of its radiation. 
C) The higher an object's temperature, the more radiation it emits. 
D) The higher an object's temperature, the higher the speed of the radiation it emits.

Question 18

An electron in an s state of an atom has an angular momentum quantum number of

Accepted Answer

A) 0. 
B) 1. 
C) 2. 
D) 3. 
A) 0. 
B) 1. 
C) 2. 
D) 3.

Question 19

The uncertainty principle is a fundamental part of

Accepted Answer

A) Newtonian mechanics. 
B) quantum mechanics. 
C) the quantum theory of light. 
D) the Bohr theory of the hydrogen atom. 
A) Newtonian mechanics. 
B) quantum mechanics. 
C) the quantum theory of light. 
D) the Bohr theory of the hydrogen atom.

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 wavelengths in the various spectral series of an element

The orbital of an electron in an atom is

Planck's constant is h = 6.6 * 10^-34 Js.Light of wavelength 5 * 10^-7 m consists of photons whose energy is

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

The photoelectric effect occurs only when the incident light has more than a certain minimum

Planck's constant is h = 6.6 * 10^-34 Js and the electron mass is 9.1 * 10^-31 kg.The speed of an electron whose de Broglie wavelength is 10^-10 is

The speed of a photon

When light is directed at a metal surface, the emitted electrons

A proton and an electron have the same de Broglie wavelength.

Each orbital in an atom can be occupied by

The electron structures of atoms never emit

A neon sign does not produce

The number of quantum numbers needed to determine the size and shape of an atomic orbital is

Planck's constant is h = 6.6 * 10^-34 Js.An x-ray photon has an energy of 6.6 * 10^-15 J.The frequency that corresponds to this energy is

If Planck's constant were smaller than it is,

In order to increase the rate at which photoelectrons are emitted by a surface on which light is directed, it is necessary to increase the

Which of these statements is true for the radiation emitted by all objects?

An electron in an s state of an atom has an angular momentum quantum number of

The uncertainty principle is a fundamental part of

An electron and a gamma ray have the same wavelength.

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Exam 9: The Atom

The wavelengths in the various spectral series of an element

The orbital of an electron in an atom is

Planck's constant is h = 6.6 * 10-34 Js.Light of wavelength 5 * 10-7 m consists of photons whose energy is

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

The photoelectric effect occurs only when the incident light has more than a certain minimum

Planck's constant is h = 6.6 * 10-34 Js and the electron mass is 9.1 * 10-31 kg.The speed of an electron whose de Broglie wavelength is 10-10 is

The speed of a photon

When light is directed at a metal surface, the emitted electrons

A proton and an electron have the same de Broglie wavelength.

Each orbital in an atom can be occupied by

The electron structures of atoms never emit

A neon sign does not produce

The number of quantum numbers needed to determine the size and shape of an atomic orbital is

Planck's constant is h = 6.6 * 10-34 Js.An x-ray photon has an energy of 6.6 * 10-15 J.The frequency that corresponds to this energy is

If Planck's constant were smaller than it is,

In order to increase the rate at which photoelectrons are emitted by a surface on which light is directed, it is necessary to increase the

Which of these statements is true for the radiation emitted by all objects?

An electron in an s state of an atom has an angular momentum quantum number of

The uncertainty principle is a fundamental part of

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

The Universe

Filters

Planck's constant is h = 6.6 * 10^-34 Js.Light of wavelength 5 * 10^-7 m consists of photons whose energy is

Planck's constant is h = 6.6 * 10^-34 Js and the electron mass is 9.1 * 10^-31 kg.The speed of an electron whose de Broglie wavelength is 10^-10 is

Planck's constant is h = 6.6 * 10^-34 Js.An x-ray photon has an energy of 6.6 * 10^-15 J.The frequency that corresponds to this energy is