Question 1

Which of the following is a correct set of quantum numbers for an electron in a 5f orbital?

Accepted Answer

A)  n = 5, l = 3, ml = +1 
B)  n = 5, l = 2, ml = +3 
C)  n = 4, l = 3, ml = 0 
D)  n = 4, l = 2, ml = +1 
E)  n = 5, l = 4, ml = 3

Question 2

Which of the following frequencies of electromagnetic radiation has the shortest wavelength?

Accepted Answer

A)  1 kilohertz 
B)  1 terahertz 
C)  1 dekahertz 
D)  1 gigahertz 
E)  1 megahertz

Question 3

Which of the following is a correct set of quantum numbers for an electron in a 3d orbital?

Accepted Answer

A)  n = 3, l = 0, ml = -1 
B)  n = 3, l = 1, ml = +3 
C)  n = 3, l = 2, ml = 3 
D)  n = 3, l = 3, ml = +2 
E)  n = 3, l = 2, ml = -2

Question 4

A photon has an energy of 5.53 * 10¯17 J. What is its frequency in s¯1?

Accepted Answer

A)  3.66 * 10¯50 s¯1 
B)  1.20 * 10¯17 s¯1 
C)  3.59 * 10¯9 s¯1 
D)  2.78 * 108 s¯1 
E)  8.35 * 1016 s¯1

Question 5

In an atom, the square of an electron's wave function

Accepted Answer

A)  becomes zero at the nucleus. 
B)  is smallest near the nucleus. 
C)  is largest near the nucleus. 
D)  may be zero at more than one point. 
E)  tends to infinity at large distances from the nucleus.

Question 6

A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?

Accepted Answer

A)  7.29* 10¯37 m 
B)  3.26 * 10¯37 m 
C)  5.08 *10¯30 m 
D)  1.34 * 10¯30 m 
E)  None of these choices is correct.

Question 7

The orientation in space of an atomic orbital is associated with

Accepted Answer

A)  the principal quantum number (n). 
B)  the angular momentum quantum number (l). 
C)  the magnetic quantum number (ml). 
D)  the spin quantum number (ms). 
E)  None of these choices is correct.

Question 8

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.

Question 9

Electromagnetic radiation can be specified by its wavelength ($\lambda$), its frequency ($\nu$) or its period (). The period is the time it takes one complete wavelength to pass a point in space. Based on this information, what is the mathematical relationship between $\nu$ and ?

Accepted Answer

A)  ($\nu$ = 1/) 
B)  ($\nu$= ) 
C)  ( = $\nu$/c) 
D)  (c =  *$\nu$) 
E)  ( = c/$\nu$)

Question 10

The Rydberg equation is an example of an empirical equation.

Accepted Answer

A) True 
 B)False

Question 11

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 is correct.

Question 12

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

Question 13

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

Accepted Answer

A)  radio, visible, infrared, ultraviolet 
B)  infrared, visible, ultraviolet, microwave 
C)  visible, ultraviolet, infrared, gamma rays 
D)  X-radiation, visible, infrared, microwave 
E)  microwave, infrared, visible, ultraviolet

Question 14

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

Question 15

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 given off by a black body?

Accepted Answer

A)  none 
B)  one 
C)  two 
D)  three 
E)  four

Question 16

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

Question 17

In the quantum mechanical treatment of the hydrogen atom, the probability of finding an electron at any point is proportional to the wave function $ \varPsi$.

Accepted Answer

A) True 
 B)False

Question 18

In not more than three lines for each answer, briefly outline one important scientific contribution of each of the following:
A) Planck
B) de Broglie
C) Heisenberg

Accepted Answer

The answer of In not more than three lines for...

Question 19

In the Rydberg equation, for a fixed value of n1, the longest wavelength line has n2 = $\infty$.

Accepted Answer

A) True 
 B)False

Question 20

Continuous spectra are characteristic of molecules in the gas phase.

Accepted Answer

A) True 
 B)False

Exam 7: Quantum Theory and Atomic Structure

Which of the following is a correct set of quantum numbers for an electron in a 5f orbital?

Which of the following frequencies of electromagnetic radiation has the shortest wavelength?

Which of the following is a correct set of quantum numbers for an electron in a 3d orbital?

A photon has an energy of 5.53 * 10¯¹⁷ J. What is its frequency in s¯¹?

In an atom, the square of an electron's wave function

A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?

The orientation in space of an atomic orbital is associated with

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

The Rydberg equation is an example of an empirical equation.

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:

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?

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

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

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 given off by a black body?

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

In the quantum mechanical treatment of the hydrogen atom, the probability of finding an electron at any point is proportional to the wave function $\varPsi$ .

In not more than three lines for each answer, briefly outline one important scientific contribution of each of the following: A) Planck B) de Broglie C) Heisenberg

In the Rydberg equation, for a fixed value of n₁, the longest wavelength line has n₂ = $\infty$ .

Continuous spectra are characteristic of molecules in the gas phase.

Exam 7: Quantum Theory and Atomic Structure

Which of the following is a correct set of quantum numbers for an electron in a 5f orbital?

Which of the following frequencies of electromagnetic radiation has the shortest wavelength?

Which of the following is a correct set of quantum numbers for an electron in a 3d orbital?

A photon has an energy of 5.53 * 10¯17 J. What is its frequency in s¯1?

In an atom, the square of an electron's wave function

A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?

The orientation in space of an atomic orbital is associated with

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

The Rydberg equation is an example of an empirical equation.

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:

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?

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

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

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 given off by a black body?

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

In the quantum mechanical treatment of the hydrogen atom, the probability of finding an electron at any point is proportional to the wave function Ψ \varPsiΨ .

In not more than three lines for each answer, briefly outline one important scientific contribution of each of the following: A) Planck B) de Broglie C) Heisenberg

In the Rydberg equation, for a fixed value of n1, the longest wavelength line has n2 = ∞\infty∞ .

Continuous spectra are characteristic of molecules in the gas phase.

A photon has an energy of 5.53 * 10¯¹⁷ J. What is its frequency in s¯¹?

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:

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

In the quantum mechanical treatment of the hydrogen atom, the probability of finding an electron at any point is proportional to the wave function $\varPsi$ .

In the Rydberg equation, for a fixed value of n₁, the longest wavelength line has n₂ = $\infty$ .