Question 1

Which of the following elements would you expect to have the greatest first ionization energy?

Accepted Answer

A)  C 
B)  O 
C)  Li 
D)  Be 
E)  B 
A)  C 
B)  O 
C)  Li 
D)  Be 
E)  B

Question 2

Which of the following will lead to an increase in the kinetic energies of photoelectrons emitted when light is incident on a metal surface?

Accepted Answer

A)  decrease in the light's wavelength 
B)  increase in the light's intensity 
C)  increase in the light's wavelength 
D)  decrease in the light's frequency 
E)  decrease in the light's intensity 
A)  decrease in the light's wavelength 
B)  increase in the light's intensity 
C)  increase in the light's wavelength 
D)  decrease in the light's frequency 
E)  decrease in the light's intensity

Question 3

What is the speed of an argon atom that has a de Broglie wavelength of 5.2 pm?

Accepted Answer

A)  0.52 m/s 
B)  5.2* 103 m/s 
C)  1.9 *103 m/s 
D)  1.9 m/s 
E)  25 m/s 
A)  0.52 m/s 
B)  5.2* 103 m/s 
C)  1.9 *103 m/s 
D)  1.9 m/s 
E)  25 m/s

Question 4

Which of the transitions in the following hydrogen atom energy-level diagram involves the shortest wavelength photon?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
A)  a 
B)  b 
C)  c 
D)  d

Question 5

Give the names of the three quantum numbers (n, $\ell$ 
, and m $\ell$ 
) that identify the mathematical functions (orbitals) that are solutions to Schrödinger's wave equation, and describe how the energy, size, shape, and orientation of the orbital varies with the relative values of these quantum numbers.

Accepted Answer

n is the principal quantum number. As it

Question 6

Which atom or ion has the largest number of unpaired electrons?

Accepted Answer

A)  N 
B)  O 
C)  Na+ 
D)  N3- 
E)  Sc 
A)  N 
B)  O 
C)  Na+ 
D)  N3- 
E)  Sc

Question 7

What is the minimum energy that a photon must have to ionize a hydrogen atom from the n = 3 energy level?

Accepted Answer

The answer of What is the minimum energy that a...

Question 8

De Broglie reasoned that for the electron in the hydrogen atom to behave as a stable circular wave, the circumference of the electron's orbit must be ________

Accepted Answer

A)  equal to the wavelength of the electron. 
B)  an integer multiple of the electron's wavelength. 
C)  a half integer multiple of the electron's wavelength. 
D)  twice the wavelength of the electron. 
E)  twice the diameter of the orbit. 
A)  equal to the wavelength of the electron. 
B)  an integer multiple of the electron's wavelength. 
C)  a half integer multiple of the electron's wavelength. 
D)  twice the wavelength of the electron. 
E)  twice the diameter of the orbit.

Question 9

What is the minimum frequency of a photon that can eject a photoelectron from Ba metal? (The work function of barium is   = 4.3 *10-19 J.)

Accepted Answer

A)  2.8 *10-52 Hz 
B)  6.5 * 1014 Hz 
C)  6.5 * 104 Hz 
D)  6.5 * 1013 Hz 
E)  2.8 * 1014 Hz 
A)  2.8 *10-52 Hz 
B)  6.5 * 1014 Hz 
C)  6.5 * 104 Hz 
D)  6.5 * 1013 Hz 
E)  2.8 * 1014 Hz

Question 10

In refraction, polychromatic light is dispersed into its component wavelengths by ________

Accepted Answer

A)  constructive and destructive interference of light waves in air. 
B)  internal reflections within a prism. 
C)  differences in the bending of different wavelengths of light by a prism. 
D)  constructive and destructive interference of light waves in a prism. 
E)  the reduction in the intensity of white light to reveal the colors. 
A)  constructive and destructive interference of light waves in air. 
B)  internal reflections within a prism. 
C)  differences in the bending of different wavelengths of light by a prism. 
D)  constructive and destructive interference of light waves in a prism. 
E)  the reduction in the intensity of white light to reveal the colors.

Question 11

What is the frequency (v, in Hz) of the photons emitted by a He-Ne laser with a wavelength ($\lambda$) of 632.8 nm?

Accepted Answer

A)  4.738 * 105 Hz 
B)  1.897 * 102 Hz 
C)  1.897 *1011 Hz 
D)  4.738 * 1014 Hz 
E)  1.897 * 1014 Hz 
A)  4.738 * 105 Hz 
B)  1.897 * 102 Hz 
C)  1.897 *1011 Hz 
D)  4.738 * 1014 Hz 
E)  1.897 * 1014 Hz

Question 12

Which of the following metals would be an appropriate choice for the construction of a photon detector for 550 nm light?

Accepted Answer

A)  sodium (  = 4.4 * 10-19 J) 
B)  rubidium (  = 3.5 *10-19J) 
C)  barium ( = 4.3 *10-19 J) 
D)  gold (  = 8.2 *10-19 J) 
E)  platinum (  = 9.1 *10-19 J) 
A)  sodium (  = 4.4 * 10-19 J) 
B)  rubidium (  = 3.5 *10-19J) 
C)  barium ( = 4.3 *10-19 J) 
D)  gold (  = 8.2 *10-19 J) 
E)  platinum (  = 9.1 *10-19 J)

Question 13

How many of these atoms or ions have no unpaired electrons?
N, O, Na+, N3-, Sc

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 14

Copper forms a cation with a charge of 1+, but the element to the right of it in the periodic table (Zn) forms a cation with a 2+ charge. Use your knowledge of electron configurations to explain this observation.

Accepted Answer

Copper has the electronic conf

Question 15

Which arrangement is in the correct order of decreasing radii?

Accepted Answer

A)  As3- > Br - > K+ 
B)  F- > Mg+ > Cs 
C)  Na+ > Cs+ > I- 
D)  Be > Ba+ > O2- 
E)  Li+ > Na+ > K+ 
A)  As3- > Br - > K+ 
B)  F- > Mg+ > Cs 
C)  Na+ > Cs+ > I- 
D)  Be > Ba+ > O2- 
E)  Li+ > Na+ > K+

Question 16

If each of the following metals is exposed to light with a wavelength of 240 nm, which will emit photoelectrons with the greatest kinetic energy?

Accepted Answer

A)  iron (  = 7.2 *10-19 J) 
B)  platinum (  = 9.1 *10-19 J) 
C)  nickel (  = 8.3 *10-19 J) 
D)  palladium (  = 8.2 *10-19 J) 
E)  sodium (  = 4.4 *10-19 J) 
A)  iron (  = 7.2 *10-19 J) 
B)  platinum (  = 9.1 *10-19 J) 
C)  nickel (  = 8.3 *10-19 J) 
D)  palladium (  = 8.2 *10-19 J) 
E)  sodium (  = 4.4 *10-19 J)

Question 17

What color will a blue object appear when it is seen through a filter with the absorption spectrum shown below?

Accepted Answer

A)  blue 
B)  yellow 
C)  red 
D)  black 
E)  white 
A)  blue 
B)  yellow 
C)  red 
D)  black 
E)  white

Question 18

The ion of which element is most likely to have a charge of +2?

Accepted Answer

A)  Al 
B)  N 
C)  Cs 
D)  Zn 
E)  S 
A)  Al 
B)  N 
C)  Cs 
D)  Zn 
E)  S

Question 19

Which of the following orbitals is the lowest in energy (assuming they are all in the same shell)?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 20

Based on the following graph, which metal will emit the highest energy photoelectron when a photon with a wavelength of 650 nm is incident on the metal?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
A)  a 
B)  b 
C)  c 
D)  d

Exam 7: A Quantum Model of Atoms: Waves and Particles

Which of the following elements would you expect to have the greatest first ionization energy?

Which of the following will lead to an increase in the kinetic energies of photoelectrons emitted when light is incident on a metal surface?

What is the speed of an argon atom that has a de Broglie wavelength of 5.2 pm?

Which of the transitions in the following hydrogen atom energy-level diagram involves the shortest wavelength photon?

Which atom or ion has the largest number of unpaired electrons?

What is the minimum energy that a photon must have to ionize a hydrogen atom from the n = 3 energy level?

De Broglie reasoned that for the electron in the hydrogen atom to behave as a stable circular wave, the circumference of the electron's orbit must be ________

What is the minimum frequency of a photon that can eject a photoelectron from Ba metal? (The work function of barium is = 4.3 *10-19 J.)

In refraction, polychromatic light is dispersed into its component wavelengths by ________

What is the frequency (v, in Hz) of the photons emitted by a He-Ne laser with a wavelength ( λ\lambdaλ ) of 632.8 nm?

Which of the following metals would be an appropriate choice for the construction of a photon detector for 550 nm light?

How many of these atoms or ions have no unpaired electrons? N, O, Na+, N3-, Sc

Copper forms a cation with a charge of 1+, but the element to the right of it in the periodic table (Zn) forms a cation with a 2+ charge. Use your knowledge of electron configurations to explain this observation.

Which arrangement is in the correct order of decreasing radii?

If each of the following metals is exposed to light with a wavelength of 240 nm, which will emit photoelectrons with the greatest kinetic energy?

What color will a blue object appear when it is seen through a filter with the absorption spectrum shown below?

The ion of which element is most likely to have a charge of +2?

Which of the following orbitals is the lowest in energy (assuming they are all in the same shell)?

Based on the following graph, which metal will emit the highest energy photoelectron when a photon with a wavelength of 650 nm is incident on the metal?

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: the Air We Breathe

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Solids: Structures and Applications

Organic Chemistry: Fuels, Pharmaceuticals, Materials, and Life

Chemical Kinetics: Reactions in the Air We Breathe

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acid-Base and Solubility Equilibria: Reactions in Soil and Water

Metal Ions: Colorful and Essential

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry: Applications to Energy and Medicine

Life and the Periodic Table

Filters

What is the minimum frequency of a photon that can eject a photoelectron from Ba metal? (The work function of barium is = 4.3 *10^-¹⁹ J.)

What is the frequency (v, in Hz) of the photons emitted by a He-Ne laser with a wavelength ( $\lambda$ ) of 632.8 nm?

How many of these atoms or ions have no unpaired electrons? N, O, Na⁺, N³^-, Sc