Question 1

The Lewis structure of which of the following formula violates the octet rule?

Accepted Answer

A)  SF6 
B)  NF3 
C)  OF2 
D)  HF 
E)  SiF4 
A)  SF6 
B)  NF3 
C)  OF2 
D)  HF 
E)  SiF4

Question 2

When you draw the Lewis structure for PF2Cl3,how many single bonds,double bonds,and lone pair electrons reside on the central phosphorus atom?

Accepted Answer

A)  5 single bonds,0 double bonds,0 lone pairs 
B)  4 single bonds,1 double bond,0 lone pairs 
C)  5 single bonds,0 double bonds,1 lone pair 
D)  4 single bonds,1 double bond,1 lone pair 
E)  3 single bonds,2 double bonds,0 lone pairs 
A)  5 single bonds,0 double bonds,0 lone pairs 
B)  4 single bonds,1 double bond,0 lone pairs 
C)  5 single bonds,0 double bonds,1 lone pair 
D)  4 single bonds,1 double bond,1 lone pair 
E)  3 single bonds,2 double bonds,0 lone pairs

Question 3

Which of the following elements is most likely to form a molecular structure that disobeys the octet rule?

Accepted Answer

A)  B 
B)  C 
C)  N 
D)  O 
E)  F 
A)  B 
B)  C 
C)  N 
D)  O 
E)  F

Question 4

Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of boron tribromide,BBr3.

Accepted Answer

A)  The electron-pair geometry is trigonal-pyramidal,the molecular geometry is trigonal-pyramidal. 
B)  The electron-pair geometry is trigonal-planar,the molecular geometry is trigonal-planar. 
C)  The electron-pair geometry is trigonal-planar,the molecular geometry is bent. 
D)  The electron-pair geometry is tetrahedral,the molecular geometry is trigonal-pyramidal. 
E)  The electron-pair geometry is trigonal-pyramidal,the molecular geometry is t-shaped. 
A)  The electron-pair geometry is trigonal-pyramidal,the molecular geometry is trigonal-pyramidal. 
B)  The electron-pair geometry is trigonal-planar,the molecular geometry is trigonal-planar. 
C)  The electron-pair geometry is trigonal-planar,the molecular geometry is bent. 
D)  The electron-pair geometry is tetrahedral,the molecular geometry is trigonal-pyramidal. 
E)  The electron-pair geometry is trigonal-pyramidal,the molecular geometry is t-shaped.

Question 5

How many lone pairs of electrons are assigned to the iodine atom in ICl?

Accepted Answer

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

Question 6

Use VSEPR theory to predict the molecular geometry around either carbon atom in acetylene,C2H2.

Accepted Answer

A)  linear 
B)  bent 
C)  trigonal-planar 
D)  tetrahedral 
E)  octahedral 
A)  linear 
B)  bent 
C)  trigonal-planar 
D)  tetrahedral 
E)  octahedral

Question 7

If two or more species have the same number of electrons,resulting in similar Lewis structures,they are said to be ____.

Accepted Answer

A)  isoelectronic 
B)  resonant structures 
C)  ionic 
D)  neutral 
E)  covalent 
A)  isoelectronic 
B)  resonant structures 
C)  ionic 
D)  neutral 
E)  covalent

Question 8

What is the bond order of O22+?

Accepted Answer

A)  1 
B)  1.5 
C)  2 
D)  2.5 
E)  3 
A)  1 
B)  1.5 
C)  2 
D)  2.5 
E)  3

Question 9

Which combination of atoms is most likely to produce a compound with covalent bonds?

Accepted Answer

A)  K and Br 
B)  Al and S 
C)  S and Cl 
D)  Sn and F 
E)  Li and I 
A)  K and Br 
B)  Al and S 
C)  S and Cl 
D)  Sn and F 
E)  Li and I

Question 10

What are the approximate O-S-O bond angles in SO32-?

Accepted Answer

A)  90S1U1P1$\circ$S1S1P0 
B)  109.5S1U1P1$\circ$S1S1P0 
C)  120S1U1P1$\circ$S1S1P0 
D)  180S1U1P1$\circ$S1S1P0 
E)  90S1U1P1$\circ$S1S1P0 and 180S1U1P1$\circ$S1S1P0 
A)  90S1U1P1$\circ$S1S1P0 
B)  109.5S1U1P1$\circ$S1S1P0 
C)  120S1U1P1$\circ$S1S1P0 
D)  180S1U1P1$\circ$S1S1P0 
E)  90S1U1P1$\circ$S1S1P0 and 180S1U1P1$\circ$S1S1P0

Question 11

Which of the following elements is able to form a molecular structure that exceeds the octet rule?

Accepted Answer

A)  F 
B)  N 
C)  C 
D)  B 
E)  Sb 
A)  F 
B)  N 
C)  C 
D)  B 
E)  Sb

Question 12

Which of the following has an incomplete octet in its Lewis structure?

Accepted Answer

A)  SO2 
B)  F2 
C)  NO2 
D)  ICl 
E)  CO2 
A)  SO2 
B)  F2 
C)  NO2 
D)  ICl 
E)  CO2

Question 13

How many hydrogen atoms are needed to complete the following hydrocarbon structure?

Accepted Answer

A)  4 
B)  6 
C)  2 
D)  8 
E)  3 
A)  4 
B)  6 
C)  2 
D)  8 
E)  3

Question 14

Use the bond energies provided to complete the following statement.________ when all of the bonds in acetic acid (CH3COOH)are formed.

Accepted Answer

A)  3153 kJ/mol of energy is released 
B)  3153 kJ/mol of energy is consumed 
C)  2805 kJ/mol of energy is released 
D)  2805 kJ/mol of energy is consumed 
E)  2766 kJ/mol of energy is consumed 
A)  3153 kJ/mol of energy is released 
B)  3153 kJ/mol of energy is consumed 
C)  2805 kJ/mol of energy is released 
D)  2805 kJ/mol of energy is consumed 
E)  2766 kJ/mol of energy is consumed

Question 15

Which of the following species will have a Lewis structure most like that of IF4-?

Accepted Answer

A)  XeF4 
B)  SO42- 
C)  PF4+ 
D)  SF4 
E)  IO4- 
A)  XeF4 
B)  SO42- 
C)  PF4+ 
D)  SF4 
E)  IO4-

Question 16

Which combination of atoms is most likely to produce a compound with ionic bonds?

Accepted Answer

A)  B and C 
B)  S and O 
C)  N and F 
D)  Si and Cl 
E)  Mg and O 
A)  B and C 
B)  S and O 
C)  N and F 
D)  Si and Cl 
E)  Mg and O

Question 17

In which pair do $\underline{\text{ both }}$  compounds exhibit predominantly ionic bonding?

Accepted Answer

A)  KI and O3 
B)  NaF and H2O 
C)  PCl3 and HF 
D)  Na2SO3 and CH4 
E)  RbBr and CaO 
A)  KI and O3 
B)  NaF and H2O 
C)  PCl3 and HF 
D)  Na2SO3 and CH4 
E)  RbBr and CaO

Question 18

What is the formal charge on each atom in dichloromethane,CH2Cl2?

Accepted Answer

A)  C atom = 0,each H atom = 0,and each Cl atom = 0 
B)  C atom = -2,each H atom = +1,and two Cl atoms = 0 
C)  C atom = +4,each H = -1,and each Cl atom = -1 
D)  C atom = +4,each H = +1,and each Cl atom = -1 
E)  C atom = -4,each H = +1,and each Cl atom = +1 
A)  C atom = 0,each H atom = 0,and each Cl atom = 0 
B)  C atom = -2,each H atom = +1,and two Cl atoms = 0 
C)  C atom = +4,each H = -1,and each Cl atom = -1 
D)  C atom = +4,each H = +1,and each Cl atom = -1 
E)  C atom = -4,each H = +1,and each Cl atom = +1

Question 19

Which of the following is a correct Lewis structure for sulfate ion?

Accepted Answer

A)  
  
B)  
  
C)  
  
D)  
  
E)  
  
A)  
  
B)  
  
C)  
  
D)  
  
E)

Question 20

What are the approximate F-Br-F bond angles in BrF5?

Accepted Answer

A)  90S1U1P1$\circ$S1S1P0 and 180S1U1P1$\circ$S1S1P0 
B)  109.5S1U1P1$\circ$S1S1P0 
C)  90S1U1P1$\circ$S1S1P0 and 120S1U1P1$\circ$S1S1P0 
D)  120S1U1P1$\circ$S1S1P0 
E)  180S1U1P1$\circ$S1S1P0 
A)  90S1U1P1$\circ$S1S1P0 and 180S1U1P1$\circ$S1S1P0 
B)  109.5S1U1P1$\circ$S1S1P0 
C)  90S1U1P1$\circ$S1S1P0 and 120S1U1P1$\circ$S1S1P0 
D)  120S1U1P1$\circ$S1S1P0 
E)  180S1U1P1$\circ$S1S1P0

Exam 9: Bonding and Molecular Structure

The Lewis structure of which of the following formula violates the octet rule?

When you draw the Lewis structure for PF2Cl3,how many single bonds,double bonds,and lone pair electrons reside on the central phosphorus atom?

Which of the following elements is most likely to form a molecular structure that disobeys the octet rule?

Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of boron tribromide,BBr3.

How many lone pairs of electrons are assigned to the iodine atom in ICl?

Use VSEPR theory to predict the molecular geometry around either carbon atom in acetylene,C2H2.

If two or more species have the same number of electrons,resulting in similar Lewis structures,they are said to be ____.

What is the bond order of O22+?

Which combination of atoms is most likely to produce a compound with covalent bonds?

What are the approximate O-S-O bond angles in SO32-?

Which of the following elements is able to form a molecular structure that exceeds the octet rule?

Which of the following has an incomplete octet in its Lewis structure?

How many hydrogen atoms are needed to complete the following hydrocarbon structure?

Use the bond energies provided to complete the following statement.________ when all of the bonds in acetic acid (CH3COOH)are formed.

Which of the following species will have a Lewis structure most like that of IF4-?

Which combination of atoms is most likely to produce a compound with ionic bonds?

In which pair do both ‾\underline{\text{ both }} both ​ compounds exhibit predominantly ionic bonding?

What is the formal charge on each atom in dichloromethane,CH2Cl2?

Which of the following is a correct Lewis structure for sulfate ion?

What are the approximate F-Br-F bond angles in BrF5?

Basic Concepts of Chemistry

Mathlets Review: The Tools of Quantitative Chemistry

Atoms, molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure: Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Chemistry of Solids

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Reactivity: Chemical Equilibria

The Chemistry of Acids and Bases

Principles of Reactivity: Other Aspects of Aqueous Equilibria

Entropy and Free Energy

Principles of Reactivity: Electron Transfer Reactions

Environmental Chemistry Earths Environment,energy,and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

When you draw the Lewis structure for PF₂Cl₃,how many single bonds,double bonds,and lone pair electrons reside on the central phosphorus atom?

Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of boron tribromide,BBr₃.

Use VSEPR theory to predict the molecular geometry around either carbon atom in acetylene,C₂H₂.

What is the bond order of O₂²⁺?

What are the approximate O-S-O bond angles in SO₃^2-?

Use the bond energies provided to complete the following statement.________ when all of the bonds in acetic acid (CH₃COOH)are formed.

Which of the following species will have a Lewis structure most like that of IF₄^-?

In which pair do $\underline{\text{ both }}$ compounds exhibit predominantly ionic bonding?

What is the formal charge on each atom in dichloromethane,CH₂Cl₂?

What are the approximate F-Br-F bond angles in BrF₅?