Question 1

A covalent bond between the same two atoms is the longest.

Accepted Answer

A)  triple 
B)  single 
C)  double 
D)  They are all the same length. 
E)  strong 
A)  triple 
B)  single 
C)  double 
D)  They are all the same length. 
E)  strong

Question 2

Based on the octet rule, phosphorus most likely forms a _ ion.

Accepted Answer

A)  P5-  
B)  P3+  
C)  P3-  
D)  P+  
E)  P5+ 
A)  P5-  
B)  P3+  
C)  P3-  
D)  P+  
E)  P5+

Question 3

In some molecules and polyatomic ions, the sum of the valence electrons is odd and as a result the octet rule fails.

Accepted Answer

A) True 
 B)False

Question 4

Using the table of bond dissociation energies, the OH for the following reaction is kJ.

Accepted Answer

A)  - 359 
B)  - 223 
C)  359 
D)  208 
E)  223 
A)  - 359 
B)  - 223 
C)  359 
D)  208 
E)  223

Question 5

Most explosives are compounds that decompose rapidly to produce products and a great deal of .

Accepted Answer

A)  solid, gas 
B)  liquid, heat 
C)  gaseous, gases 
D)  gaseous, heat 
E)  soluble, heat 
A)  solid, gas 
B)  liquid, heat 
C)  gaseous, gases 
D)  gaseous, heat 
E)  soluble, heat

Question 6

A double bond consists of pairs of electrons shared between two atoms.

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  6 
A)  1 
B)  2 
C)  3 
D)  4 
E)  6

Question 7

Based on the octet rule, magnesium most likely forms a _ ion.

Accepted Answer

A)  Mg6-  
B)  Mg2+  
C)  Mg2-  
D)  Mg-  
E)  Mg6+ 
A)  Mg6-  
B)  Mg2+  
C)  Mg2-  
D)  Mg-  
E)  Mg6+

Question 8

The formal charge on nitrogen in NO3- is _ .

Accepted Answer

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

Question 9

The greater the lattice energy, the greater the charges on the participatory ions and the smaller their radii.

Accepted Answer

A) True 
 B)False

Question 10

What is the maximum number of double bonds that a hydrogen atom can form?

Accepted Answer

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

Question 11

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

Accepted Answer

A)  1 
B)  5 
C)  4 
D)  2 
E)  6 
A)  1 
B)  5 
C)  4 
D)  2 
E)  6

Question 12

Using the Born- Haber cycle, the OHf° of KBr is equal to _ _.

Accepted Answer

A)  OHf°[K (g)] + OHf°[Br (g)] - I1 - E(Br) + OHlattice 
B)  OHf°[K (g)] + OHf°[Br (g)] + I1(K) + E(Br) + OHlattice 
C)  OHf°[K (g)] - OHf°[Br (g)] + I1(K) - E(Br) + OHlattice 
D)  OHf°[K (g)] + OHf°[Br (g)] + I1(K) + E(Br) - OHlattice 
E)  OHf°[K (g)] - OHf°[Br (g)] - I1(K) - E(Br) - OHlattice 
A)  OHf°[K (g)] + OHf°[Br (g)] - I1 - E(Br) + OHlattice 
B)  OHf°[K (g)] + OHf°[Br (g)] + I1(K) + E(Br) + OHlattice 
C)  OHf°[K (g)] - OHf°[Br (g)] + I1(K) - E(Br) + OHlattice 
D)  OHf°[K (g)] + OHf°[Br (g)] + I1(K) + E(Br) - OHlattice 
E)  OHf°[K (g)] - OHf°[Br (g)] - I1(K) - E(Br) - OHlattice

Question 13

For the questions that follow, consider the BEST Lewis structures of the following ox_yanions:
(i) NOS1U1B12S1U1B0S1U1P1-S1S1P0S1U1P1 S1S1P0
(ii) NOS1U1B13S1U1B0S1U1P1-S1S1P0S1U1P1 S1S1P0
(iii) SOS1U1B13S1U1B0S1U1P12S1S1P0S1U1P1-S1S1P0S1U1P1 S1S1P0
(iv) SOS1U1B14S1U1B0S1U1P12S1S1P0S1U1P1-S1S1P0S1U1P1 S1S1P0
(v) BrOS1U1B13S1U1B0S1U1P1-S1S1P0
-In which of the ions do all X- O bonds (X indicates the central atom) have the same length?

Accepted Answer

A)  none 
B)  all 
C)  (i) and (ii) 
D)  (iii) and (v) 
E)  (iii), (iv), and (v) 
A)  none 
B)  all 
C)  (i) and (ii) 
D)  (iii) and (v) 
E)  (iii), (iv), and (v)

Question 14

How many unpaired electrons are there in the Lewis structures of a N3- ion?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  This cannot be predicted. 
A)  0 
B)  1 
C)  2 
D)  3 
E)  This cannot be predicted.

Question 15

Which of the following has eight valence electrons?

Accepted Answer

A)  Cl- 
B)  Kr 
C)  Ti4+ 
D)  Na+ 
E)  all of the above 
A)  Cl- 
B)  Kr 
C)  Ti4+ 
D)  Na+ 
E)  all of the above

Question 16

Which of the following does not have eight valence electrons?

Accepted Answer

A)  Xe 
B)  Rb+ 
C)  Ca+ 
D)  Br- 
E)  All of the above have eight valence electrons. 
A)  Xe 
B)  Rb+ 
C)  Ca+ 
D)  Br- 
E)  All of the above have eight valence electrons.

A covalent bond between the same two atoms is the longest.

Based on the octet rule, phosphorus most likely forms a _ ion.

In some molecules and polyatomic ions, the sum of the valence electrons is odd and as a result the octet rule fails.

Using the table of bond dissociation energies, the OH for the following reaction is kJ.

Most explosives are compounds that decompose rapidly to produce products and a great deal of .

A double bond consists of pairs of electrons shared between two atoms.

Based on the octet rule, magnesium most likely forms a _ ion.

The formal charge on nitrogen in NO₃^-is _ .

The greater the lattice energy, the greater the charges on the participatory ions and the smaller their radii.

What is the maximum number of double bonds that a hydrogen atom can form?

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

Using the Born- Haber cycle, the OH_f° of KBr is equal to _ _.

For the questions that follow, consider the BEST Lewis structures of the following ox_yanions: (i) NO₂^- (ii) NO₃^- (iii) SO₃²^- (iv) SO₄²^- (v) BrO₃^- -In which of the ions do all X- O bonds (X indicates the central atom) have the same length?

How many unpaired electrons are there in the Lewis structures of a N³^-ion?

Which of the following has eight valence electrons?

Which of the following does not have eight valence electrons?

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

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Exam 8: Basic Concepts of Chemical Bonding

A covalent bond between the same two atoms is the longest.

Based on the octet rule, phosphorus most likely forms a _ ion.

In some molecules and polyatomic ions, the sum of the valence electrons is odd and as a result the octet rule fails.

Using the table of bond dissociation energies, the OH for the following reaction is kJ.

Most explosives are compounds that decompose rapidly to produce products and a great deal of .

A double bond consists of pairs of electrons shared between two atoms.

Based on the octet rule, magnesium most likely forms a _ ion.

The formal charge on nitrogen in NO3- is _ .

The greater the lattice energy, the greater the charges on the participatory ions and the smaller their radii.

What is the maximum number of double bonds that a hydrogen atom can form?

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

Using the Born- Haber cycle, the OHf° of KBr is equal to _ _.

For the questions that follow, consider the BEST Lewis structures of the following ox_yanions: (i) NO2- (ii) NO3- (iii) SO32- (iv) SO42- (v) BrO3- -In which of the ions do all X- O bonds (X indicates the central atom) have the same length?

How many unpaired electrons are there in the Lewis structures of a N3- ion?

Which of the following has eight valence electrons?

Which of the following does not have eight valence electrons?

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

The formal charge on nitrogen in NO₃^-is _ .

Using the Born- Haber cycle, the OH_f° of KBr is equal to _ _.

For the questions that follow, consider the BEST Lewis structures of the following ox_yanions: (i) NO₂^- (ii) NO₃^- (iii) SO₃²^- (iv) SO₄²^- (v) BrO₃^- -In which of the ions do all X- O bonds (X indicates the central atom) have the same length?

How many unpaired electrons are there in the Lewis structures of a N³^-ion?