Question 1

Which of these substances will display an incomplete octet in its Lewis structure?

Accepted Answer

A)  CO2 
B)  Cl2 
C)  ICl 
D)  NO 
E)  SO2 
A)  CO2 
B)  Cl2 
C)  ICl 
D)  NO 
E)  SO2 D

Question 2

How many dots does the Lewis dot symbol for argon have around it?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  10 
E)  8 
A)  1 
B)  2 
C)  4 
D)  10 
E)  8 E

Question 3

Which response includes all the molecules below that have a central atom that does not follow the octet rule? (1) H2S, (2) BCl3, (3) PH3, (4) SF4

Accepted Answer

A)  (2) and (4) 
B)  (2) and (3) 
C)  (1) and (2) 
D)  (3) and (4) 
E)  (1) and (4) 
A)  (2) and (4) 
B)  (2) and (3) 
C)  (1) and (2) 
D)  (3) and (4) 
E)  (1) and (4) A

Question 4

What is wrong with this Lewis structure?

Accepted Answer

A)  There are too many electrons. 
B)  There are too few electrons. 
C)  The O atom does not have an octet. 
D)  The C atom does not have an octet. 
E)  There is nothing wrong with this Lewis structure. 
A)  There are too many electrons. 
B)  There are too few electrons. 
C)  The O atom does not have an octet. 
D)  The C atom does not have an octet. 
E)  There is nothing wrong with this Lewis structure.

Question 5

Identify the correct equation to calculate the formal charge on an atom.

Accepted Answer

A)  formal charge = valence electrons - lone pair electrons 
B)  formal charge = valence electrons - associated electrons 
C)  formal charge = valence electrons - bonding electrons 
D)  formal charge = bonding electrons + lone pair electrons 
E)  formal charge = valence electrons - bonding electrons + lone pair electrons 
A)  formal charge = valence electrons - lone pair electrons 
B)  formal charge = valence electrons - associated electrons 
C)  formal charge = valence electrons - bonding electrons 
D)  formal charge = bonding electrons + lone pair electrons 
E)  formal charge = valence electrons - bonding electrons + lone pair electrons

Question 6

Which of the following represents the most polar bond?

Accepted Answer

A)  B-C 
B)  S-O 
C)  C-O 
D)  B-O 
E)  C-C 
A)  B-C 
B)  S-O 
C)  C-O 
D)  B-O 
E)  C-C

Question 7

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s). What does the symbol represent?

Accepted Answer

A)  Electron configuration 
B)  Valence electrons 
C)  Atomic number 
D)  Atomic mass 
E)  Nucleus and core electrons 
A)  Electron configuration 
B)  Valence electrons 
C)  Atomic number 
D)  Atomic mass 
E)  Nucleus and core electrons

Question 8

What formal charge resides on the carbon of CO32-?

Accepted Answer

A)  0 
B)  +1 
C)  +2 
D)  +3 
E)  +4 
A)  0 
B)  +1 
C)  +2 
D)  +3 
E)  +4

Question 9

Select the element whose Lewis symbol is correct.

Accepted Answer

A)  •Ga• 
B)    
C)  Al• 
D)    
A)  •Ga• 
B)    
C)  Al• 
D)

Question 10

Which of the following is a covalent compound?

Accepted Answer

A)  Na2O 
B)  CaCl2 
C)  Cl2O 
D)  CsCl 
E)  Al2O3 
A)  Na2O 
B)  CaCl2 
C)  Cl2O 
D)  CsCl 
E)  Al2O3

Question 11

In the best Lewis structure for the fulminate ion, CNO-, what is the formal charge on the central nitrogen atom?

Accepted Answer

A)  +2 
B)  +1 
C)  0 
D)  -1 
E)  -2 
A)  +2 
B)  +1 
C)  0 
D)  -1 
E)  -2

Question 12

The Lewis dot symbol for the S2- ion is

Accepted Answer

A)    
B)    
C)  S2- 
D)    
E)    
A)    
B)    
C)  S2- 
D)    
E)

Question 13

When an alkali metal combines with a nonmetal, a covalent bond is normally formed.

Accepted Answer

A) True 
 B)False

Question 14

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s). What does the symbol represent?

Accepted Answer

A)  Electron configuration 
B)  Valence electrons 
C)  Atomic number 
D)  Atomic mass 
E)  Nucleus and core electrons 
A)  Electron configuration 
B)  Valence electrons 
C)  Atomic number 
D)  Atomic mass 
E)  Nucleus and core electrons

Question 15

The total number of bonding electrons in a molecule of formaldehyde (H2CO) is

Accepted Answer

A)  3. 
B)  4. 
C)  6. 
D)  8. 
E)  18. 
A)  3. 
B)  4. 
C)  6. 
D)  8. 
E)  18.

Question 16

________ of atoms interact to form compounds.

Accepted Answer

The answer of ________ of atoms interact to form compounds....

Question 17

Describe, with appropriate explanations, the key factors which affect the magnitude of the lattice energy of an ionic substance.

Accepted Answer

By Coulomb's law, the energy of two elec

Question 18

The number of dots in the Lewis dot symbol for a main group element is the same as the ________.

Accepted Answer

The answer of The number of dots in the Lewis...

Question 19

Based on ionic radii and charges, which of the following solids would have the greatest lattice energy?

Accepted Answer

A)  SrO 
B)  CsI 
C)  MgCl2 
D)  KF 
E)  NaF 
A)  SrO 
B)  CsI 
C)  MgCl2 
D)  KF 
E)  NaF

Question 20

How many single bonds are bonded to sulfur in SF6?

Accepted Answer

A)  2 
B)  4 
C)  6 
D)  7 
E)  8 
A)  2 
B)  4 
C)  6 
D)  7 
E)  8

Exam 8: Chemical Bonding I: Basic Concepts

Which of these substances will display an incomplete octet in its Lewis structure?

How many dots does the Lewis dot symbol for argon have around it?

Which response includes all the molecules below that have a central atom that does not follow the octet rule? (1) H2S, (2) BCl3, (3) PH3, (4) SF4

What is wrong with this Lewis structure?

Identify the correct equation to calculate the formal charge on an atom.

Which of the following represents the most polar bond?

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s). What does the symbol represent?

What formal charge resides on the carbon of CO32-?

Select the element whose Lewis symbol is correct.

Which of the following is a covalent compound?

In the best Lewis structure for the fulminate ion, CNO-, what is the formal charge on the central nitrogen atom?

The Lewis dot symbol for the S2- ion is

When an alkali metal combines with a nonmetal, a covalent bond is normally formed.

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s). What does the symbol represent?

The total number of bonding electrons in a molecule of formaldehyde (H2CO) is

________ of atoms interact to form compounds.

Describe, with appropriate explanations, the key factors which affect the magnitude of the lattice energy of an ionic substance.

The number of dots in the Lewis dot symbol for a main group element is the same as the ________.

Based on ionic radii and charges, which of the following solids would have the greatest lattice energy?

How many single bonds are bonded to sulfur in SF6?

Chemistry: the Central Science

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding II: Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

Which response includes all the molecules below that have a central atom that does not follow the octet rule? (1) H₂S, (2) BCl_3, (3) PH_3, (4) SF₄

What formal charge resides on the carbon of CO₃^2-?

In the best Lewis structure for the fulminate ion, CNO^-, what is the formal charge on the central nitrogen atom?

The Lewis dot symbol for the S^2- ion is

The total number of bonding electrons in a molecule of formaldehyde (H₂CO) is

How many single bonds are bonded to sulfur in SF₆?