Question 1

Who developed an empirical equation from which the wavelengths of lines in the spectrum of hydrogen atoms can be calculated?

Accepted Answer

A)  Planck 
B)  de Broglie 
C)  Bohr 
D)  Rutherford 
E)  Rydberg 
A)  Planck 
B)  de Broglie 
C)  Bohr 
D)  Rutherford 
E)  Rydberg

Question 2

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 3

As the frequency of electromagnetic radiation increases, its wavelength also increases.

Accepted Answer

A) True 
 B)False

Question 4

Who was the first scientist to propose that the atom had a dense nucleus that occupied only a small fraction of the volume of the atom?

Accepted Answer

A)  Planck 
B)  Bohr 
C)  Rydberg 
D)  Rutherford 
E)  Thomson 
A)  Planck 
B)  Bohr 
C)  Rydberg 
D)  Rutherford 
E)  Thomson

Question 5

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 6

The ionization energy is the energy needed to remove an electron from an atom. In the Bohr model of the hydrogen atom, this means exciting the electron to the n = ∞ state. What is the ionization energy in kJ/mol, for hydrogen atoms initially in the n = 2 energy level?

Accepted Answer

A)  290 kJ/mol 
B)  328 kJ/mol 
C)  656 kJ/mol 
D)  983 kJ/mol 
E)  1311 kJ/mol 
A)  290 kJ/mol 
B)  328 kJ/mol 
C)  656 kJ/mol 
D)  983 kJ/mol 
E)  1311 kJ/mol

Question 7

The energy of an electron in the hydrogen atom is determined by

Accepted Answer

A)  the principal quantum number (n) only. 
B)  the angular momentum quantum number (l) only. 
C)  the principal and angular momentum quantum numbers (n & l ). 
D)  the principal and magnetic quantum numbers (n & ml). 
E)  the principal, angular momentum and magnetic quantum numbers. 
A)  the principal quantum number (n) only. 
B)  the angular momentum quantum number (l) only. 
C)  the principal and angular momentum quantum numbers (n & l ). 
D)  the principal and magnetic quantum numbers (n & ml). 
E)  the principal, angular momentum and magnetic quantum numbers.

Question 8

The Rydberg equation is an example of an empirical equation.

Accepted Answer

A) True 
 B)False

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

Who proposed the principle that 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 11

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

Accepted Answer

A) True 
 B)False

Question 12

Which scientist demonstrated that photons transferred momentum during collisions with matter?

Accepted Answer

A)  Bohr 
B)  de Broglie 
C)  Planck 
D)  Compton 
E)  Billiard 
A)  Bohr 
B)  de Broglie 
C)  Planck 
D)  Compton 
E)  Billiard

Question 13

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 × 103 m/s, the uncertainty in its position (in m) is at least

Accepted Answer

A)  1.7 × 10-8 m. 
B)  6.6 × 10-8 m. 
C)  17 m. 
D)  66 m. 
E)  None of these choices are correct. 
A)  1.7 × 10-8 m. 
B)  6.6 × 10-8 m. 
C)  17 m. 
D)  66 m. 
E)  None of these choices are correct.

Question 14

According to the Rydberg equation, the longest wavelength (in nm) in the series of H-atom lines with n1 = 3 is

Accepted Answer

A)  1875 nm. 
B)  1458 nm. 
C)  820. nm. 
D)  656 nm. 
E)  365 nm. 
A)  1875 nm. 
B)  1458 nm. 
C)  820. nm. 
D)  656 nm. 
E)  365 nm.

Question 15

Select the arrangement of electromagnetic radiation which starts with the lowest wavelength and increases greatest wavelength.

Accepted Answer

A)  radio, infrared, ultraviolet, gamma rays 
B)  radio, ultraviolet, infrared, gamma rays 
C)  gamma rays, radio, ultraviolet, infrared 
D)  gamma rays, infrared, radio, ultraviolet 
E)  gamma rays, ultraviolet, infrared, radio 
A)  radio, infrared, ultraviolet, gamma rays 
B)  radio, ultraviolet, infrared, gamma rays 
C)  gamma rays, radio, ultraviolet, infrared 
D)  gamma rays, infrared, radio, ultraviolet 
E)  gamma rays, ultraviolet, infrared, radio

Question 16

Contact lenses can focus light due to the ____________ of the waves.

Accepted Answer

A)  diffraction 
B)  reflection 
C)  refraction 
D)  dispersion 
E)  interference 
A)  diffraction 
B)  reflection 
C)  refraction 
D)  dispersion 
E)  interference

Question 17

An infrared wave has a wavelength of 6.5 × 10-4 cm. What is this distance in angstroms, Å?

Accepted Answer

A)  6.5 × 10-4 Å 
B)  2.2 × 10-4 Å 
C)  4.6 × 103 Å 
D)  6.5 × 104 Å 
E)  6.5 × 106 Å 
A)  6.5 × 10-4 Å 
B)  2.2 × 10-4 Å 
C)  4.6 × 103 Å 
D)  6.5 × 104 Å 
E)  6.5 × 106 Å

Question 18

Consider the following adjectives used to describe types of spectrum: Continuous line atomic emission absorption
How many of them are appropriate to describe the spectrum of radiation absorbed by a sample of mercury vapor?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
E)  five 
A)  one 
B)  two 
C)  three 
D)  four 
E)  five

Question 19

An electron in the n = 6 level emits a photon with a wavelength of 410.2 nm. To what energy level does the electron move?

Accepted Answer

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

Question 20

The interference pattern seen when light passes through narrow, closely spaced slits, is due to

Accepted Answer

A)  diffraction. 
B)  reflection. 
C)  refraction. 
D)  dispersion. 
E)  deflection. 
A)  diffraction. 
B)  reflection. 
C)  refraction. 
D)  dispersion. 
E)  deflection.

Exam 7: Quantum Theory and Atomic Structure

Who developed an empirical equation from which the wavelengths of lines in the spectrum of hydrogen atoms can be calculated?

Interference of light waves

As the frequency of electromagnetic radiation increases, its wavelength also increases.

Who was the first scientist to propose that the atom had a dense nucleus that occupied only a small fraction of the volume of the atom?

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

The ionization energy is the energy needed to remove an electron from an atom. In the Bohr model of the hydrogen atom, this means exciting the electron to the n = ∞ state. What is the ionization energy in kJ/mol, for hydrogen atoms initially in the n = 2 energy level?

The energy of an electron in the hydrogen atom is determined by

The Rydberg equation is an example of an empirical equation.

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

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

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

Which scientist demonstrated that photons transferred momentum during collisions with matter?

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 × 103 m/s, the uncertainty in its position (in m) is at least

According to the Rydberg equation, the longest wavelength (in nm) in the series of H-atom lines with n1 = 3 is

Select the arrangement of electromagnetic radiation which starts with the lowest wavelength and increases greatest wavelength.

Contact lenses can focus light due to the ____________ of the waves.

An infrared wave has a wavelength of 6.5 × 10-4 cm. What is this distance in angstroms, Å?

Consider the following adjectives used to describe types of spectrum: Continuous line atomic emission absorption How many of them are appropriate to describe the spectrum of radiation absorbed by a sample of mercury vapor?

An electron in the n = 6 level emits a photon with a wavelength of 410.2 nm. To what energy level does the electron move?

The interference pattern seen when light passes through narrow, closely spaced slits, is due to

Keys to Studying Chemistry Definitions, Units, and Problem Solving

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 Reaction Direction

Electrochemistry Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 × 10³ m/s, the uncertainty in its position (in m) is at least

According to the Rydberg equation, the longest wavelength (in nm) in the series of H-atom lines with n₁ = 3 is

An infrared wave has a wavelength of 6.5 × 10^-4 cm. What is this distance in angstroms, Å?