Question 1

Explain the context and meanings of the terms "orbit" and "orbital," making a clear distinction between them.

Accepted Answer

Orbit is a term from the Bohr theory, an

Question 2

Use the Rydberg equation to calculate the frequency of a photon absorbed when the hydrogen atom undergoes a transition from n1 = 2 to n2 = 4. (R = 1.096776 * 107 m¯1)

Accepted Answer

A)  2.056* 106 s¯1 
B)  2.742 *106 s¯1 
C)  6.165* 1014 s¯1 
D)  8.226 * 1014 s¯1 
E)  > 1015 s¯1 
A)  2.056* 106 s¯1 
B)  2.742 *106 s¯1 
C)  6.165* 1014 s¯1 
D)  8.226 * 1014 s¯1 
E)  > 1015 s¯1

Question 3

A radio wave has a frequency of 8.6 * 108 Hz. What is the energy of one photon of this radiation?

Accepted Answer

A)  7.7 * 10¯43 J 
B)  2.3* 10¯34 J 
C)  5.7 * 10¯25 J 
D)  1.7 * 10¯16 J 
E)  > 10¯15 J 
A)  7.7 * 10¯43 J 
B)  2.3* 10¯34 J 
C)  5.7 * 10¯25 J 
D)  1.7 * 10¯16 J 
E)  > 10¯15 J

Question 4

Line spectra from all regions of the electromagnetic spectrum, including the Paschen series of infrared lines for hydrogen, are used by astronomers to identify elements present in the atmospheres of stars. Calculate the wavelength of the photon emitted when the hydrogen atom undergoes a transition from n = 5 to n = 3. (R = 1.096776 * 107 m¯1)

Accepted Answer

A)  205.1 nm 
B)  384.6 nm 
C)  683.8 nm 
D)  1282 nm 
E)  > 1500 nm 
A)  205.1 nm 
B)  384.6 nm 
C)  683.8 nm 
D)  1282 nm 
E)  > 1500 nm

Question 5

Continuous spectra are characteristic of heated solids.

Accepted Answer

A) True 
 B)False

Question 6

A wave function for an electron is called an atomic orbital.

Accepted Answer

A) True 
 B)False

Question 7

Other factors being constant, a heavy object will have a longer de Broglie wavelength than a light object.

Accepted Answer

A) True 
 B)False

Question 8

The FM station KDUL broadcasts music at 99.1 MHz. Find the wavelength of these waves.

Accepted Answer

A)  1.88 * 10¯2 m 
B)  0.330 m 
C)  3.03 m 
D)  5.33 * 102 m 
E)  > 103 m 
A)  1.88 * 10¯2 m 
B)  0.330 m 
C)  3.03 m 
D)  5.33 * 102 m 
E)  > 103 m

Question 9

The Bohr theory of the hydrogen atom predicts the energy difference (in J) between the n= 3 and the n = 5 state to be

Accepted Answer

A)  8.72 * 10¯20 J 
B)  1.36 * 10¯19 J 
C)  2.42 *10¯19 J 
D)  1.55 * 10¯19 J 
E)  1.09 *10¯18 J 
A)  8.72 * 10¯20 J 
B)  1.36 * 10¯19 J 
C)  2.42 *10¯19 J 
D)  1.55 * 10¯19 J 
E)  1.09 *10¯18 J

Question 10

Atomic orbitals developed using quantum mechanics

Accepted Answer

A)  describe regions of space in which one is most likely to find an electron. 
B)  describe exact paths for electron motion. 
C)  give a description of the atomic structure which is essentially the same as the Bohr model. 
D)  allow scientists to calculate an exact volume for the hydrogen atom. 
E)  are in conflict with the Heisenberg Uncertainty Principle. 
A)  describe regions of space in which one is most likely to find an electron. 
B)  describe exact paths for electron motion. 
C)  give a description of the atomic structure which is essentially the same as the Bohr model. 
D)  allow scientists to calculate an exact volume for the hydrogen atom. 
E)  are in conflict with the Heisenberg Uncertainty Principle.

Question 11

Who proposed the principle which states that one cannot simultaneously know the exact position and velocity of a particle?

Accepted Answer

A)  Einstein 
B)  Planck 
C)  Heisenberg 
D)  Compton 
E)  de Broglie 
A)  Einstein 
B)  Planck 
C)  Heisenberg 
D)  Compton 
E)  de Broglie

Question 12

Electromagnetic radiation of 500 nm wavelength lies in the ______________ region of the spectrum.

Accepted Answer

A)  infrared 
B)  visible 
C)  ultraviolet 
D)  X-ray 
E)  g-ray 
A)  infrared 
B)  visible 
C)  ultraviolet 
D)  X-ray 
E)  g-ray

Question 13

Interference of light waves

Accepted Answer

A)  separates light into its component colors. 
B)  creates a pattern of light and dark regions. 
C)  focuses a broad beam of light into a point. 
D)  bends light as it passes the edge of an object. 
E)  creates a laser beam. 
A)  separates light into its component colors. 
B)  creates a pattern of light and dark regions. 
C)  focuses a broad beam of light into a point. 
D)  bends light as it passes the edge of an object. 
E)  creates a laser beam.

Question 14

What are the possible values for the following quantum numbers in an atom?
A) n
B) l
C) ml

Accepted Answer

a. n = 1, 2, 3, ...

Explain the context and meanings of the terms "orbit" and "orbital," making a clear distinction between them.

Use the Rydberg equation to calculate the frequency of a photon absorbed when the hydrogen atom undergoes a transition from n₁ = 2 to n₂ = 4. (R = 1.096776 * 10⁷ m¯¹)

A radio wave has a frequency of 8.6 * 10⁸ Hz. What is the energy of one photon of this radiation?

Continuous spectra are characteristic of heated solids.

A wave function for an electron is called an atomic orbital.

Other factors being constant, a heavy object will have a longer de Broglie wavelength than a light object.

The FM station KDUL broadcasts music at 99.1 MHz. Find the wavelength of these waves.

The Bohr theory of the hydrogen atom predicts the energy difference (in J) between the n= 3 and the n = 5 state to be

Atomic orbitals developed using quantum mechanics

Who proposed the principle which states that one cannot simultaneously know the exact position and velocity of a particle?

Electromagnetic radiation of 500 nm wavelength lies in the ______________ region of the spectrum.

Interference of light waves

What are the possible values for the following quantum numbers in an atom? A) n B) l C) m_l

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Exam 7: Quantum Theory and Atomic Structure

Explain the context and meanings of the terms "orbit" and "orbital," making a clear distinction between them.

Use the Rydberg equation to calculate the frequency of a photon absorbed when the hydrogen atom undergoes a transition from n1 = 2 to n2 = 4. (R = 1.096776 * 107 m¯1)

A radio wave has a frequency of 8.6 * 108 Hz. What is the energy of one photon of this radiation?

Continuous spectra are characteristic of heated solids.

A wave function for an electron is called an atomic orbital.

Other factors being constant, a heavy object will have a longer de Broglie wavelength than a light object.

The FM station KDUL broadcasts music at 99.1 MHz. Find the wavelength of these waves.

The Bohr theory of the hydrogen atom predicts the energy difference (in J) between the n= 3 and the n = 5 state to be

Atomic orbitals developed using quantum mechanics

Who proposed the principle which states that one cannot simultaneously know the exact position and velocity of a particle?

Electromagnetic radiation of 500 nm wavelength lies in the ______________ region of the spectrum.

Interference of light waves

What are the possible values for the following quantum numbers in an atom? A) n B) l C) ml

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Use the Rydberg equation to calculate the frequency of a photon absorbed when the hydrogen atom undergoes a transition from n₁ = 2 to n₂ = 4. (R = 1.096776 * 10⁷ m¯¹)

A radio wave has a frequency of 8.6 * 10⁸ Hz. What is the energy of one photon of this radiation?

What are the possible values for the following quantum numbers in an atom? A) n B) l C) m_l