Question 1

In the Lewis structure of ClF, the formal charge on Cl is _ and the formal charge on F is

Accepted Answer

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

Question 2

The Lewis structure of HCN (H bonded to C) shows that has nonbonding electron pairs.

Accepted Answer

A)  C, 2 
B)  N, 2 
C)  H, 1 
D)  C, 1 
E)  N, 1 
A)  C, 2 
B)  N, 2 
C)  H, 1 
D)  C, 1 
E)  N, 1 E

Question 3

Elements from opposite sides of the periodic table tend to form .

Accepted Answer

A)  homonuclear diatomic compounds 
B)  covalent compounds 
C)  compounds that are gaseous at room temperature 
D)  covalent compounds that are gaseous at room temperature 
E)  ionic compounds 
A)  homonuclear diatomic compounds 
B)  covalent compounds 
C)  compounds that are gaseous at room temperature 
D)  covalent compounds that are gaseous at room temperature 
E)  ionic compounds E

Question 4

Dynamite .

Accepted Answer

A)  is made of nitroglycerine and an absorbent such as diatomaceous earth 
B)  was invented by Alfred Nobel 
C)  is a much safer explosive than pure nitroglycerine 
D)  is an explosive 
E)  all of the above 
A)  is made of nitroglycerine and an absorbent such as diatomaceous earth 
B)  was invented by Alfred Nobel 
C)  is a much safer explosive than pure nitroglycerine 
D)  is an explosive 
E)  all of the above

Question 5

To convert from one resonance structure to another, .

Accepted Answer

A)  neither electrons nor atoms can be moved 
B)  electrons and atoms can both be moved 
C)  only atoms can be moved 
D)  electrons must be added 
E)  only electrons can be moved 
A)  neither electrons nor atoms can be moved 
B)  electrons and atoms can both be moved 
C)  only atoms can be moved 
D)  electrons must be added 
E)  only electrons can be moved

Question 6

The only noble gas without eight valence electrons is .

Accepted Answer

A)  Ar 
B)  Kr 
C)  He 
D)  Ne 
E)  All noble gases have eight valence electrons. 
A)  Ar 
B)  Kr 
C)  He 
D)  Ne 
E)  All noble gases have eight valence electrons.

Question 7

Determining lattice energy from Born- Haber cycle data requires the use of .

Accepted Answer

A)  Avogadro's number 
B)  the octet rule 
C)  Coulomb's law 
D)  Hess's law 
E)  Periodic law 
A)  Avogadro's number 
B)  the octet rule 
C)  Coulomb's law 
D)  Hess's law 
E)  Periodic law

Question 8

A valid Lewis structure of _ _ cannot be drawn without violating the octet rule.

Accepted Answer

A)  NF3  
B)  SeF4  
C)  SiF4  
D)  PO43-  
E)  CF4 
A)  NF3  
B)  SeF4  
C)  SiF4  
D)  PO43-  
E)  CF4

Question 9

In the nitrite ion (NO2- ), .

Accepted Answer

A)  one bond is a double bond and the other is a single bond 
B)  both bonds are single bonds 
C)  both bonds are the same 
D)  both bonds are double bonds 
E)  there are 20 valence electrons 
A)  one bond is a double bond and the other is a single bond 
B)  both bonds are single bonds 
C)  both bonds are the same 
D)  both bonds are double bonds 
E)  there are 20 valence electrons

Question 10

The Lewis structure of AsH3 shows nonbonding electron pair(s) on As.

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  This cannot be determined from the data given. 
A)  0 
B)  1 
C)  2 
D)  3 
E)  This cannot be determined from the data given.

Question 11

The diagram below is the Born- huber cycle for the formation of crystalline potassium fluoride.  
-Which energy change corresponds to the first ionization energy of potassium?

Accepted Answer

A)  6 
B)  3 
C)  2 
D)  4 
E)  5 
A)  6 
B)  3 
C)  2 
D)  4 
E)  5

Question 12

The formal charge on carbon in the molecule below is .

Accepted Answer

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

Question 13

Lattice energy is .

Accepted Answer

A)  the energy required to produce one mole of an ionic compound from its constituent elements in their standard states 
B)  the energy required to convert a mole of ionic solid into its constituent ions in the gas phase 
C)  the sum of electron affinities of the components in an ionic solid 
D)  the energy given off when gaseous ions combine to form one mole of an ionic solid 
E)  the sum of ionization energies of the components in an ionic solid 
A)  the energy required to produce one mole of an ionic compound from its constituent elements in their standard states 
B)  the energy required to convert a mole of ionic solid into its constituent ions in the gas phase 
C)  the sum of electron affinities of the components in an ionic solid 
D)  the energy given off when gaseous ions combine to form one mole of an ionic solid 
E)  the sum of ionization energies of the components in an ionic solid

Question 14

The Lewis structure of N2H2 shows .

Accepted Answer

A)  each hydrogen has one nonbonding electron pair 
B)  a nitrogen- nitrogen single bond 
C)  each nitrogen has two nonbinding electron pairs 
D)  a nitrogen- nitrogen triple bond 
E)  each nitrogen has one nonbinding electron pair 
A)  each hydrogen has one nonbonding electron pair 
B)  a nitrogen- nitrogen single bond 
C)  each nitrogen has two nonbinding electron pairs 
D)  a nitrogen- nitrogen triple bond 
E)  each nitrogen has one nonbinding electron pair

Question 15

When a metal gains an electron, the process is endothermic.

Accepted Answer

A) True 
 B)False

Question 16

How many hydrogen atoms must bond to silicon to give it an octet of valence electrons?

Accepted Answer

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

Question 17

Alternative but equivalent Lewis structures are called _ _ .

Accepted Answer

resonance

Question 18

The halogens, alkali metals, and alkaline earth metals have valence electrons, respectively.

Accepted Answer

A)  1, 5, and 7 
B)  7, 4, and 6 
C)  8, 2, and 3 
D)  7, 1, and 2 
E)  2, 7, and 4 
A)  1, 5, and 7 
B)  7, 4, and 6 
C)  8, 2, and 3 
D)  7, 1, and 2 
E)  2, 7, and 4

Question 19

The Lewis structure of PF3 shows that the central phosphorus atom has nonbonding and bonding electron pairs.

Accepted Answer

A)  3, 1 
B)  1, 2 
C)  1, 3 
D)  3, 3 
E)  2, 2 
A)  3, 1 
B)  1, 2 
C)  1, 3 
D)  3, 3 
E)  2, 2

Question 20

Based on the octet rule, iodine most likely forms an _ ion.

Accepted Answer

A)  I4-  
B)  I2+  
C)  I+  
D)  I4+  
E)  I- 
A)  I4-  
B)  I2+  
C)  I+  
D)  I4+  
E)  I-

Exam 8: Basic Concepts of Chemical Bonding

In the Lewis structure of ClF, the formal charge on Cl is _ and the formal charge on F is

The Lewis structure of HCN (H bonded to C) shows that has nonbonding electron pairs.

Elements from opposite sides of the periodic table tend to form .

Dynamite .

To convert from one resonance structure to another, .

The only noble gas without eight valence electrons is .

Determining lattice energy from Born- Haber cycle data requires the use of .

A valid Lewis structure of _ _ cannot be drawn without violating the octet rule.

In the nitrite ion (NO2- ), .

The Lewis structure of AsH3 shows nonbonding electron pair(s) on As.

The diagram below is the Born- huber cycle for the formation of crystalline potassium fluoride. -Which energy change corresponds to the first ionization energy of potassium?

The formal charge on carbon in the molecule below is .

Lattice energy is .

The Lewis structure of N2H2 shows .

When a metal gains an electron, the process is endothermic.

How many hydrogen atoms must bond to silicon to give it an octet of valence electrons?

Alternative but equivalent Lewis structures are called _ _ .

The halogens, alkali metals, and alkaline earth metals have valence electrons, respectively.

The Lewis structure of PF3 shows that the central phosphorus atom has nonbonding and bonding electron pairs.

Based on the octet rule, iodine most likely forms an _ ion.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Electronic Structure of Atoms

Periodic Properties of the Elements

Gases

Intermolecular Forces, Liquids, and Solids

Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Chemistry of Coordination Compounds

The Chemistry of Life: Organic and Biological Chemistry

Filters

In the nitrite ion (NO₂^-), .

The Lewis structure of AsH₃shows nonbonding electron pair(s) on As.

The Lewis structure of N₂H₂shows .

The Lewis structure of PF₃shows that the central phosphorus atom has nonbonding and bonding electron pairs.