Question 1

For the Bohr hydrogen atom determine the energy level corresponding to n = 3.

Accepted Answer

A)  7.26 × 10-19 J 
B)  7.36 × 10-35 J 
C)  -2.42 × 10-19 J 
D)  3.33 × 107 J 
E)  1.96 × 10-17 J 
A)  7.26 × 10-19 J 
B)  7.36 × 10-35 J 
C)  -2.42 × 10-19 J 
D)  3.33 × 107 J 
E)  1.96 × 10-17 J

Question 2

The symbol "n" in the Bohr theory of atomic structure refers to the number of electrons in a shell.

Accepted Answer

A) True 
 B)False

Question 3

In a hydrogen atom, orbitals with the same energy: 
I. extend the same distance from the nucleus.
II. have the same principle quantum number, n.
III. are referred to as iso-electronic.
IV. are referred to as degenerate.
V. are represented by 1s and 2s orbitals.

Accepted Answer

A)  I, III, IV 
B)  I, II, IV 
C)  I, IV, V 
D)  I, II, III 
E)  I, II, III, and IV 
A)  I, III, IV 
B)  I, II, IV 
C)  I, IV, V 
D)  I, II, III 
E)  I, II, III, and IV

Question 4

How many unpaired electrons are in the ground state electron configuration of calcium?

Accepted Answer

A)  5 
B)  2 
C)  0 
D)  1 
E)  3 
A)  5 
B)  2 
C)  0 
D)  1 
E)  3

Question 5

Use the Balmer equation to determine n for the spectral line of wavelength 656 nm. The constant for Balmer's equation is 3.2881 × 1015 s-1.

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  6 
E)  7 
A)  3 
B)  4 
C)  5 
D)  6 
E)  7

Question 6

Which statement regarding the wave function as suggested by Erwin Schrodinger is INCORRECT?

Accepted Answer

A)  It has fluctuating values at all points on the curve. 
B)  It is a mathematical equation. 
C)  It is denoted by psi (Ψ). 
D)  It can describe any particle with wavelike motions. 
E)  It corresponds to a standing wave within the boundary of the system. 
A)  It has fluctuating values at all points on the curve. 
B)  It is a mathematical equation. 
C)  It is denoted by psi (Ψ). 
D)  It can describe any particle with wavelike motions. 
E)  It corresponds to a standing wave within the boundary of the system.

Question 7

When an electron in an atom goes from a high energy state to a low one, what occurs?

Accepted Answer

A)  Another electron goes from a low energy state to a high one. 
B)  The atom moves faster. 
C)  Light is given off. 
D)  This process is not possible. 
E)  Light is absorbed. 
A)  Another electron goes from a low energy state to a high one. 
B)  The atom moves faster. 
C)  Light is given off. 
D)  This process is not possible. 
E)  Light is absorbed.

Question 8

The Bohr theory explains that an emission spectral line is due to an electron losing energy but keeping the same values of its four quantum numbers.

Accepted Answer

A) True 
 B)False

Question 9

Calculate the deBroglie wavelength of a ball of mass 125 grams and velocity 90 m/s.

Accepted Answer

A)  0.59 m 
B)  5.9 × 10-31 m 
C)  5.9 × 10-35 m 
D)  590 m 
E)  1.7 × 1034 m 
A)  0.59 m 
B)  5.9 × 10-31 m 
C)  5.9 × 10-35 m 
D)  590 m 
E)  1.7 × 1034 m

Question 10

All of the terms below are quantum numbers EXCEPT:

Accepted Answer

A)  principal 
B)  magnetic 
C)  spin 
D)  valence 
E)  orbital angular momentum 
A)  principal 
B)  magnetic 
C)  spin 
D)  valence 
E)  orbital angular momentum

Question 11

Which of the following subshells is correctly designated?

Accepted Answer

A)  1p5 
B)  3s3 
C)  3f2 
D)  4d11 
E)  2p6 
A)  1p5 
B)  3s3 
C)  3f2 
D)  4d11 
E)  2p6

Question 12

1s22s22p63s23p64s23d3 is the ground state electronic configuration of ________.

Accepted Answer

A)  scandium 
B)  niobium 
C)  chromium 
D)  vanadium 
E)  molybdenum 
A)  scandium 
B)  niobium 
C)  chromium 
D)  vanadium 
E)  molybdenum

Question 13

Which statement about the zero-point energy is INCORRECT?

Accepted Answer

A)  It is the lowest energy value of a particle. 
B)  It's value can be zero. 
C)  Because the zero-point energy is not zero, the particle cannot be at rest. 
D)  Zero-point energy corresponds to n = 1. 
E)  The zero-point energy is an allowable value of the energy of the particle. 
A)  It is the lowest energy value of a particle. 
B)  It's value can be zero. 
C)  Because the zero-point energy is not zero, the particle cannot be at rest. 
D)  Zero-point energy corresponds to n = 1. 
E)  The zero-point energy is an allowable value of the energy of the particle.

Question 14

[Kr]5s24d105p5 is the ground state electronic configuration of ________.

Accepted Answer

A)  Te 
B)  I 
C)  Br 
D)  At 
E)  S 
A)  Te 
B)  I 
C)  Br 
D)  At 
E)  S

Question 15

The quantum numbers of the last electron of cerium are ________.

Accepted Answer

A)  n = 6, ℓ = 3, mℓ = -2, ms = 1/2 
B)  n = 5, ℓ = 3, mℓ = -2, ms = 1/2 
C)  n = 4, ℓ = 3, mℓ = -2, ms = 1/2 
D)  n = 4, ℓ = 2, mℓ = -2, ms = 1/2 
E)  n = 4, ℓ = 4, mℓ = -2, ms = 1/2 
A)  n = 6, ℓ = 3, mℓ = -2, ms = 1/2 
B)  n = 5, ℓ = 3, mℓ = -2, ms = 1/2 
C)  n = 4, ℓ = 3, mℓ = -2, ms = 1/2 
D)  n = 4, ℓ = 2, mℓ = -2, ms = 1/2 
E)  n = 4, ℓ = 4, mℓ = -2, ms = 1/2

Question 16

Use Planck's equation to determine the energy, in J/photon, of radiation of frequency 5.8 × 1015 s-1.

Accepted Answer

A)  3.8 × 10-18 J 
B)  1.7 × 1024 J 
C)  5.8 × 10-25 J 
D)  1.7 × 10-16 J 
E)  5.2 × 10-8 J 
A)  3.8 × 10-18 J 
B)  1.7 × 1024 J 
C)  5.8 × 10-25 J 
D)  1.7 × 10-16 J 
E)  5.2 × 10-8 J

Question 17

The fact that we cannot simultaneously measure the exact position and precise momentum of an electron is referred to as:

Accepted Answer

A)  Pauli Exclusion Principle 
B)  The Aufbau Principle 
C)  Hund's Rule 
D)  The DeBroglie Relationship 
E)  Heisenberg Uncertainty Principle 
A)  Pauli Exclusion Principle 
B)  The Aufbau Principle 
C)  Hund's Rule 
D)  The DeBroglie Relationship 
E)  Heisenberg Uncertainty Principle

Question 18

The ground state electron configuration of Sc is ________.

Accepted Answer

A)  1s22s22p62d103s1 
B)  1s21p62s22p63d5 
C)  1s22s22p63s23p63d3 
D)  1s22s22p63s23p64s23d1 
E)  1s22s22p63s23p64s24p1 
A)  1s22s22p62d103s1 
B)  1s21p62s22p63d5 
C)  1s22s22p63s23p63d3 
D)  1s22s22p63s23p64s23d1 
E)  1s22s22p63s23p64s24p1

Question 19

The symbol "n" in the Bohr theory of atomic structure refers to:

Accepted Answer

A)  the energy of the electrons. 
B)  the total energy of the atom. 
C)  the number of electrons in a shell. 
D)  the shell in which an electron is found. 
E)  the number of orbits in an atom. 
A)  the energy of the electrons. 
B)  the total energy of the atom. 
C)  the number of electrons in a shell. 
D)  the shell in which an electron is found. 
E)  the number of orbits in an atom.

Question 20

The symbol "n" in the Bohr theory of atomic structure refers to the shell or orbit in which an electron is found.

Accepted Answer

A) True 
 B)False

Exam 8: Electrons in Atoms

For the Bohr hydrogen atom determine the energy level corresponding to n = 3.

The symbol "n" in the Bohr theory of atomic structure refers to the number of electrons in a shell.

In a hydrogen atom, orbitals with the same energy: I. extend the same distance from the nucleus. II. have the same principle quantum number, n. III. are referred to as iso-electronic. IV. are referred to as degenerate. V. are represented by 1s and 2s orbitals.

How many unpaired electrons are in the ground state electron configuration of calcium?

Use the Balmer equation to determine n for the spectral line of wavelength 656 nm. The constant for Balmer's equation is 3.2881 × 1015 s-1.

Which statement regarding the wave function as suggested by Erwin Schrodinger is INCORRECT?

When an electron in an atom goes from a high energy state to a low one, what occurs?

The Bohr theory explains that an emission spectral line is due to an electron losing energy but keeping the same values of its four quantum numbers.

Calculate the deBroglie wavelength of a ball of mass 125 grams and velocity 90 m/s.

All of the terms below are quantum numbers EXCEPT:

Which of the following subshells is correctly designated?

1s22s22p63s23p64s23d3 is the ground state electronic configuration of ________.

Which statement about the zero-point energy is INCORRECT?

[Kr]5s24d105p5 is the ground state electronic configuration of ________.

The quantum numbers of the last electron of cerium are ________.

Use Planck's equation to determine the energy, in J/photon, of radiation of frequency 5.8 × 1015 s-1.

The fact that we cannot simultaneously measure the exact position and precise momentum of an electron is referred to as:

The ground state electron configuration of Sc is ________.

The symbol "n" in the Bohr theory of atomic structure refers to:

The symbol "n" in the Bohr theory of atomic structure refers to the shell or orbit in which an electron is found.

Matter - Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Additional Aspects

Intermolecular Forces: Liquids and Solids

Solutions and Their Physical Properties

Chemical Kinetics

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Spontaneous Change: Entropy and Free Energy

Electrochemistry

Main Group Elements I: Groups 1, 2, 13, and 14

Main Group Elements II: Groups 18, 17, 16, 15, and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry 1-41

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

Use the Balmer equation to determine n for the spectral line of wavelength 656 nm. The constant for Balmer's equation is 3.2881 × 10¹⁵ s-1.

Use Planck's equation to determine the energy, in J/photon, of radiation of frequency 5.8 × 10¹⁵ s-1.