Question 1

The correct electron configuration for Br- is ________.

Accepted Answer

A)  [Br] 3d104s24p6 
B)  [Ar] 3d104s24p6 
C)  [Br] 4s23d104p5 
D)  [Ar] 3d104s24p5 
E)  [Ne] 3d104s24p6 
A)  [Br] 3d104s24p6 
B)  [Ar] 3d104s24p6 
C)  [Br] 4s23d104p5 
D)  [Ar] 3d104s24p5 
E)  [Ne] 3d104s24p6

Question 2

The order of subshells of increasing energy in a multiple-electron atom is 4f, 5d, 6s, 6p.

Accepted Answer

A) True 
 B)False

Question 3

What is the frequency of radiation with a wavelength of 440. nm?

Accepted Answer

A)  6.81 × 1014 s-1 
B)  6.81 × 105 s-1 
C)  1.51 × 10-27 s-1 
D)  4.95 × 10-12 s-1 
E)  2.02 × 10-11 s-1 
A)  6.81 × 1014 s-1 
B)  6.81 × 105 s-1 
C)  1.51 × 10-27 s-1 
D)  4.95 × 10-12 s-1 
E)  2.02 × 10-11 s-1

Question 4

"One places electrons into orbitals one by one from low energy to high energy" is one way of stating the:

Accepted Answer

A)  Aufbau principle 
B)  Hund's Rule 
C)  Heisenberg Principle 
D)  Pauli Exclusion Principle 
E)  Rydberg's Principle 
A)  Aufbau principle 
B)  Hund's Rule 
C)  Heisenberg Principle 
D)  Pauli Exclusion Principle 
E)  Rydberg's Principle

Question 5

Four of the 3d orbitals are alike except for the orientation with respect to the axes.

Accepted Answer

A) True 
 B)False

Question 6

An orbital: I) describes a region of high electron density.
II) describes a region in an atom where an electron is likely to be found.
III) is a wave function resulting from specific values assigned to quantum numbers in wave equations.
IV) describes a spherical region around a nucleus where an electron can be found.

Accepted Answer

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

Question 7

The four quantum numbers of the LAST electron to be placed into a Ca atom are ________.

Accepted Answer

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

Question 8

Niels Bohr promoted the connection between the periodic table and quantum theory. Which of the following statements is INCORRECT?

Accepted Answer

A)  The link between the table arrangement and quantum theory is electron configuration. 
B)  Elements in the same group have similar electron configurations. 
C)  Elements in the same group have the same number of electrons in the outer shell. 
D)  Elements in the same group have the same principle quantum number. 
E)  Elements in the same group have the same number of valence electrons. 
A)  The link between the table arrangement and quantum theory is electron configuration. 
B)  Elements in the same group have similar electron configurations. 
C)  Elements in the same group have the same number of electrons in the outer shell. 
D)  Elements in the same group have the same principle quantum number. 
E)  Elements in the same group have the same number of valence electrons.

Question 9

What is the smallest acceptable value for the missing quantum number? n = ?, ℓ = 2, mℓ = 0, ms = +1/2

Accepted Answer

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

Question 10

Which of the following orbitals have their lobes aligned along the y axis? I) dxy
II) dx2-y2
III) py
IV) dyz

Accepted Answer

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

Question 11

Experimental evidence for electron spin:

Accepted Answer

A)  has not yet been found 
B)  was provided by Uhlenbeck and Goudsmit in 1925 
C)  came as the result of an experiment with vaporized silver atoms, which was originally designed for another purpose 
D)  is provided each time we make mirror-image molecules, called left and right-handed isomers 
E)  is not needed because the concept is only for our convenience 
A)  has not yet been found 
B)  was provided by Uhlenbeck and Goudsmit in 1925 
C)  came as the result of an experiment with vaporized silver atoms, which was originally designed for another purpose 
D)  is provided each time we make mirror-image molecules, called left and right-handed isomers 
E)  is not needed because the concept is only for our convenience

Question 12

How many photons of light with frequency 5.50 × 1015 Hz are required to provide 1 kJ of energy?

Accepted Answer

A)  3.64 × 10-18 photons 
B)  2.74 × 1020 photons 
C)  4.56 × 10-4 photons 
D)  1.65 × 1044 photons 
E)  3.64 × 10-16 photons 
A)  3.64 × 10-18 photons 
B)  2.74 × 1020 photons 
C)  4.56 × 10-4 photons 
D)  1.65 × 1044 photons 
E)  3.64 × 10-16 photons

Question 13

Use the Balmer equation to determine the wavelength, in nm, of the line in the Balmer series corresponding to n = 4. The constant for Balmer's equation is 3.2881 × 1015 s-1.

Accepted Answer

A)  365 nm 
B)  45.6 nm 
C)  205 nm 
D)  486 nm 
E)  1459 nm 
A)  365 nm 
B)  45.6 nm 
C)  205 nm 
D)  486 nm 
E)  1459 nm

Question 14

Which of the following statements concerning quantum numbers is NOT correct?

Accepted Answer

A)  "n" relates the most probable distance from the nucleus. 
B)  "l" denotes geometric shape. 
C)  "m" denotes orientation of an orbital with respect to the others. 
D)  The fourth quantum number refers to electron spin. 
E)  The four quantum numbers are derived from wave mechanics. 
A)  "n" relates the most probable distance from the nucleus. 
B)  "l" denotes geometric shape. 
C)  "m" denotes orientation of an orbital with respect to the others. 
D)  The fourth quantum number refers to electron spin. 
E)  The four quantum numbers are derived from wave mechanics.

Question 15

What is the wavelength, in nm, of the spectral line resulting from the transition of an electron from n = 3 to n = 2 in a Bohr hydrogen atom? The constant for Balmer's equation is 3.2881 × 1015 s-1.

Accepted Answer

A)  18.3 nm 
B)  656 nm 
C)  547 nm 
D)  152 nm 
E)  252 nm 
A)  18.3 nm 
B)  656 nm 
C)  547 nm 
D)  152 nm 
E)  252 nm

Question 16

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

Accepted Answer

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

Question 17

Which of the following is not possible?

Accepted Answer

A)  2p 
B)  4d 
C)  5p 
D)  3f 
E)  2s 
A)  2p 
B)  4d 
C)  5p 
D)  3f 
E)  2s

Question 18

An atomic orbital represents:

Accepted Answer

A)  the shape of an atom 
B)  the repulsion of all the electrons among themselves 
C)  a fixed path that an electron follows around the nucleus of an atom 
D)  the region of electron density for a covalent bond 
E)  the region of high probability for an electron around the nucleus of an atom 
A)  the shape of an atom 
B)  the repulsion of all the electrons among themselves 
C)  a fixed path that an electron follows around the nucleus of an atom 
D)  the region of electron density for a covalent bond 
E)  the region of high probability for an electron around the nucleus of an atom

Question 19

The order of subshells of increasing energy in a multiple-electron atom is 6s, 4f, 5d, 6p.

Accepted Answer

A) True 
 B)False

Question 20

Use the spdf notation to write out the complete electron configuration of Br.

Accepted Answer

A)  [Ar] 3d104s24p5 
B)  [Kr] 3d104s24p4 
C)  [Ar] 3d94s24p6 
D)  [Ar] 3d104p65s2 
E)  [Ar] 4s24p24d9 
A)  [Ar] 3d104s24p5 
B)  [Kr] 3d104s24p4 
C)  [Ar] 3d94s24p6 
D)  [Ar] 3d104p65s2 
E)  [Ar] 4s24p24d9

Exam 8: Electrons in Atoms

The correct electron configuration for Br- is ________.

The order of subshells of increasing energy in a multiple-electron atom is 4f, 5d, 6s, 6p.

What is the frequency of radiation with a wavelength of 440. nm?

"One places electrons into orbitals one by one from low energy to high energy" is one way of stating the:

Four of the 3d orbitals are alike except for the orientation with respect to the axes.

The four quantum numbers of the LAST electron to be placed into a Ca atom are ________.

Niels Bohr promoted the connection between the periodic table and quantum theory. Which of the following statements is INCORRECT?

What is the smallest acceptable value for the missing quantum number? n = ?, ℓ = 2, mℓ = 0, ms = +1/2

Which of the following orbitals have their lobes aligned along the y axis? I) dxy II) dx2-y2 III) py IV) dyz

Experimental evidence for electron spin:

How many photons of light with frequency 5.50 × 1015 Hz are required to provide 1 kJ of energy?

Use the Balmer equation to determine the wavelength, in nm, of the line in the Balmer series corresponding to n = 4. The constant for Balmer's equation is 3.2881 × 1015 s-1.

Which of the following statements concerning quantum numbers is NOT correct?

What is the wavelength, in nm, of the spectral line resulting from the transition of an electron from n = 3 to n = 2 in a Bohr hydrogen atom? The constant for Balmer's equation is 3.2881 × 1015 s-1.

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

Which of the following is not possible?

An atomic orbital represents:

The order of subshells of increasing energy in a multiple-electron atom is 6s, 4f, 5d, 6p.

Use the spdf notation to write out the complete electron configuration of Br.

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

How many photons of light with frequency 5.50 × 10¹⁵ Hz are required to provide 1 kJ of energy?

Use the Balmer equation to determine the wavelength, in nm, of the line in the Balmer series corresponding to n = 4. The constant for Balmer's equation is 3.2881 × 10¹⁵ s-1.

What is the wavelength, in nm, of the spectral line resulting from the transition of an electron from n = 3 to n = 2 in a Bohr hydrogen atom? The constant for Balmer's equation is 3.2881 × 10¹⁵ s-1.