Question 1

Identify the compound with atoms that have an incomplete octet.

Accepted Answer

A)  ICl5 
B)  CO2 
C)  BF3 
D)  Cl2 
E)  CO 
A)  ICl5 
B)  CO2 
C)  BF3 
D)  Cl2 
E)  CO

Question 2

Place the following elements in order of decreasing electronegativity. S F Te

Accepted Answer

A)  Te > S > F 
B)  F > Te > S 
C)  Te > F > S 
D)  S > F > Te 
E)  F > S > Te 
A)  Te > S > F 
B)  F > Te > S 
C)  Te > F > S 
D)  S > F > Te 
E)  F > S > Te

Question 3

Choose the best Lewis structure for CH2Cl2.

Accepted Answer

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

Question 4

Which of the following elements can form compounds with an expanded octet?

Accepted Answer

A)  As 
B)  C 
C)  Li 
D)  F 
E)  All of the above elements can form compounds with an expanded octet. 
A)  As 
B)  C 
C)  Li 
D)  F 
E)  All of the above elements can form compounds with an expanded octet.

Question 5

Rank the following molecules in decreasing bond energy. Cl2 Br2 F2 I2

Accepted Answer

A)  I2 > Br2 > Cl2 > F2 
B)  Cl2 > Br2 > F2 > I2 
C)  I2 > Cl2 > Br2 > F2 
D)  Cl2 > I2 > F2 > Br2 
A)  I2 > Br2 > Cl2 > F2 
B)  Cl2 > Br2 > F2 > I2 
C)  I2 > Cl2 > Br2 > F2 
D)  Cl2 > I2 > F2 > Br2

Question 6

Which of the following resonance structures for OCN⁻ will contribute most to the correct structure of OCN⁻?

Accepted Answer

A)  O(2 lone pairs)   C   N (2 lone pairs) 
B)  O(1 lone pair)   C-N(3 lone pairs) 
C)  O(1 lone pair)   C(2 lone pairs)   N(1 lone pair) 
D)  O(3 lone pairs)-C   N(with 1 lone pair) 
E)  They all contribute equally to the correct structure of OCN⁻. 
A)  O(2 lone pairs)   C   N (2 lone pairs) 
B)  O(1 lone pair)   C-N(3 lone pairs) 
C)  O(1 lone pair)   C(2 lone pairs)   N(1 lone pair) 
D)  O(3 lone pairs)-C   N(with 1 lone pair) 
E)  They all contribute equally to the correct structure of OCN⁻.

Question 7

Determine the electron geometry (eg)and molecular geometry (mg)of NCl3.

Accepted Answer

A)  eg = tetrahedral, mg = tetrahedral 
B)  eg = linear, mg = trigonal planar 
C)  eg = trigonal planar, mg = bent 
D)  eg = linear, mg = linear 
E)  eg = tetrahedral, mg = trigonal pyramidal 
A)  eg = tetrahedral, mg = tetrahedral 
B)  eg = linear, mg = trigonal planar 
C)  eg = trigonal planar, mg = bent 
D)  eg = linear, mg = linear 
E)  eg = tetrahedral, mg = trigonal pyramidal

Question 8

Identify the number of electron groups around a molecule with an octahedral shape.

Accepted Answer

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

Question 9

Draw the best Lewis structure for the free radical,NO2.What is the formal charge on the N?

Accepted Answer

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

Question 10

Give the number of valence electrons for CH2Cl2.

Accepted Answer

A)  16 
B)  18 
C)  20 
D)  22 
E)  12 
A)  16 
B)  18 
C)  20 
D)  22 
E)  12

Question 11

Of the following elements,which has the highest electronegativity?

Accepted Answer

A)  P 
B)  S 
C)  Ti 
D)  As 
A)  P 
B)  S 
C)  Ti 
D)  As

Question 12

Which molecule or compound below contains a pure covalent bond?

Accepted Answer

A)  Li2CO3 
B)  SCl6 
C)  Cl2 
D)  P Br3 
E)  Li F 
A)  Li2CO3 
B)  SCl6 
C)  Cl2 
D)  P Br3 
E)  Li F

Question 13

Draw the best Lewis structure for CH3-1.What is the formal charge on the C?

Accepted Answer

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

Question 14

Place the following in order of increasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. HCN H2O H3O⁺

Accepted Answer

A)  HCN 2O 3O⁺ 
B)  H3O⁺ 2O 3O⁺ 2O 
D)  H2O 3O⁺ 
E)  H2O 3O⁺ < HCN 
A)  HCN 2O 3O⁺ 
B)  H3O⁺ 2O 3O⁺ 2O 
D)  H2O 3O⁺ 
E)  H2O 3O⁺ < HCN

Question 15

Identify the shortest bond.

Accepted Answer

A)  single covalent bond 
B)  double covalent bond 
C)  triple covalent bond 
D)  All of the above bonds are the same length. 
A)  single covalent bond 
B)  double covalent bond 
C)  triple covalent bond 
D)  All of the above bonds are the same length.

Question 16

Match between columns
                        Premises: C=N
Cs-I
Ca-O
Sr-Sr
Se-I

Accepted Answer

The Answer of longest covalent bond and metallic bond and is...

Question 17

Describe a covalent bond.

Accepted Answer

a bond for

Question 18

Place the following in order of decreasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. N2O NCl3 NO2⁻

Accepted Answer

A)  NCl3 > NO2⁻ > N2O 
B)  NO2⁻ > N2O > NCl3 
C)  N2O > NO2⁻ > NCl3 
D)  NCl3 > N2O > NO2⁻ 
E)  N2O > NCl3 > NO2⁻ 
A)  NCl3 > NO2⁻ > N2O 
B)  NO2⁻ > N2O > NCl3 
C)  N2O > NO2⁻ > NCl3 
D)  NCl3 > N2O > NO2⁻ 
E)  N2O > NCl3 > NO2⁻

Question 19

Determine the electron geometry (eg)and molecular geometry (mg)of XeF4.

Accepted Answer

A)  eg = tetrahedral, mg = tetrahedral 
B)  eg = linear, eg = linear 
C)  eg = tetrahedral, mg = bent 
D)  eg = trigonal bipyramidal, mg = tetrahedral 
E)  eg = octahedral, mg = square planar 
A)  eg = tetrahedral, mg = tetrahedral 
B)  eg = linear, eg = linear 
C)  eg = tetrahedral, mg = bent 
D)  eg = trigonal bipyramidal, mg = tetrahedral 
E)  eg = octahedral, mg = square planar

Question 20

Choose the best Lewis structure for OCl2.

Accepted Answer

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

Exam 6: Chemical Bonding I

Identify the compound with atoms that have an incomplete octet.

Place the following elements in order of decreasing electronegativity. S F Te

Choose the best Lewis structure for CH2Cl2.

Which of the following elements can form compounds with an expanded octet?

Rank the following molecules in decreasing bond energy. Cl2 Br2 F2 I2

Which of the following resonance structures for OCN⁻ will contribute most to the correct structure of OCN⁻?

Determine the electron geometry (eg)and molecular geometry (mg)of NCl3.

Identify the number of electron groups around a molecule with an octahedral shape.

Draw the best Lewis structure for the free radical,NO2.What is the formal charge on the N?

Give the number of valence electrons for CH2Cl2.

Of the following elements,which has the highest electronegativity?

Which molecule or compound below contains a pure covalent bond?

Draw the best Lewis structure for CH3-1.What is the formal charge on the C?

Place the following in order of increasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. HCN H2O H3O⁺

Identify the shortest bond.

Describe a covalent bond.

Place the following in order of decreasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. N2O NCl3 NO2⁻

Determine the electron geometry (eg)and molecular geometry (mg)of XeF4.

Choose the best Lewis structure for OCl2.

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

Choose the best Lewis structure for CH₂Cl₂.

Rank the following molecules in decreasing bond energy. Cl₂ Br₂ F₂ I₂

Determine the electron geometry (eg)and molecular geometry (mg)of NCl₃.

Draw the best Lewis structure for the free radical,NO₂.What is the formal charge on the N?

Give the number of valence electrons for CH₂Cl₂.

Draw the best Lewis structure for CH₃^-1.What is the formal charge on the C?

Place the following in order of increasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. HCN H₂O H₃O⁺

Place the following in order of decreasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. N₂O NCl₃ NO₂⁻

Determine the electron geometry (eg)and molecular geometry (mg)of XeF₄.

Choose the best Lewis structure for OCl₂.