Question 1

Which of the following has the bonds correctly arranged in order of increasing polarity?

Accepted Answer

A)  N-F, Be-F, Mg-F, O-F 
B)  Be-F, Mg-F, N-F, O-F 
C)  O-F, N-F, Be-F, Mg-F 
D)  Mg-F, Be-F, N-F, O-F 
E)  O-F, Be-F, Mg-F, N-F 
A)  N-F, Be-F, Mg-F, O-F 
B)  Be-F, Mg-F, N-F, O-F 
C)  O-F, N-F, Be-F, Mg-F 
D)  Mg-F, Be-F, N-F, O-F 
E)  O-F, Be-F, Mg-F, N-F

Question 2

How many unpaired electrons are there in an O2- 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 3

The principal quantum number of the electrons that are lost when tungsten forms a caton is

Accepted Answer

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

Question 4

The ion NO- has _ valence electrons.

Accepted Answer

A)  12 
B)  15 
C)  14 
D)  10 
E)  16 
A)  12 
B)  15 
C)  14 
D)  10 
E)  16

Question 5

Of the atoms below, is the least electronegative.

Accepted Answer

A)  Rb 
B)  F 
C)  Ca 
D)  Cl 
E)  Si 
A)  Rb 
B)  F 
C)  Ca 
D)  Cl 
E)  Si

Question 6

There are paired and unpaired electrons in the Lewis symbol for a phosphorus atom.

Accepted Answer

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

Question 7

Using the table of bond dissociation energies, the OH for the following gas- phase reaction is
KJ)

Accepted Answer

A)  - 44 
B)  - 38 
C)  304 
D)  38 
E)  2134 
A)  - 44 
B)  - 38 
C)  304 
D)  38 
E)  2134

Question 8

Which one of the following species has the electron configuration [Ar]3d4?

Accepted Answer

A)  Fe3+  
B)  Mn2+  
C)  V3+  
D)  Cr2+  
E)  K+ 
A)  Fe3+  
B)  Mn2+  
C)  V3+  
D)  Cr2+  
E)  K+

Question 9

The electron configuration of the phosph?ide ion (P3- ) is .

Accepted Answer

A)  [Ne]3s23p6 
B)  [Ne]3s23p1 
C)  [Ne]3s2 
D)  [Ne]3p2 
E)  [Ne]3s23p3 
A)  [Ne]3s23p6 
B)  [Ne]3s23p1 
C)  [Ne]3s2 
D)  [Ne]3p2 
E)  [Ne]3s23p3

Question 10

Which of the elements below has the largest electronegativity?

Accepted Answer

A)  P 
B)  Mg 
C)  Na 
D)  Si 
E)  S 
A)  P 
B)  Mg 
C)  Na 
D)  Si 
E)  S

Question 11

The strength of a covalent bond is measured by its .

Accepted Answer

The answer of The strength of a covalent bond is...

Question 12

Why don't we draw double bonds between the Be atom and the Cl atoms in BeCl2?

Accepted Answer

A)  That would give positive formal charges to the chlorine atoms and a negative formal charge to the beryllium atom. 
B)  That would result in more than eight electrons around each chlorine atom. 
C)  That would result in the formal charges not adding up to zero. 
D)  There aren't enough electrons. 
E)  That would result in more than eight electrons around beryllium. 
A)  That would give positive formal charges to the chlorine atoms and a negative formal charge to the beryllium atom. 
B)  That would result in more than eight electrons around each chlorine atom. 
C)  That would result in the formal charges not adding up to zero. 
D)  There aren't enough electrons. 
E)  That would result in more than eight electrons around beryllium.

Question 13

In the resonance form of ozone shown below, the formal charge on the central oxygen atom is

Accepted Answer

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

Question 14

Write the balanced chemical equation for the reaction for which OH°rxn is the lattice energy for potassium bromide.

Accepted Answer

KBr (s) -K

Question 15

Electron affinity is a measure of how strongly an atom can attract additional electrons.

Accepted Answer

A) True 
 B)False

Question 16

A nonpolar bond will form between two _ _ atoms of electronegativity.

Accepted Answer

A)  identical, equal 
B)  similar, different 
C)  different, opposite 
D)  different, different 
E)  identical, different 
A)  identical, equal 
B)  similar, different 
C)  different, opposite 
D)  different, different 
E)  identical, different

Question 17

How many different types of resonance structures can be drawn for the ion SO32- where all atoms satisfy the octet rule ?

Accepted Answer

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

Question 18

Draw the Lewis structure of ICl2+.

Accepted Answer

Question 19

The formula of palladium(IV) sulfide is .

Accepted Answer

A)  Pd2S2  
B)  Pd2S4  
C)  PdS4  
D)  Pd4S 
E)  PdS2 
A)  Pd2S2  
B)  Pd2S4  
C)  PdS4  
D)  Pd4S 
E)  PdS2

Question 20

Of the atoms below, is the most electronegative.

Accepted Answer

A)  Rb 
B)  Cl 
C)  Si 
D)  Ca 
E)  S 
A)  Rb 
B)  Cl 
C)  Si 
D)  Ca 
E)  S

Exam 8: Basic Concepts of Chemical Bonding

Which of the following has the bonds correctly arranged in order of increasing polarity?

How many unpaired electrons are there in an O2- ion?

The principal quantum number of the electrons that are lost when tungsten forms a caton is

The ion NO- has _ valence electrons.

Of the atoms below, is the least electronegative.

There are paired and unpaired electrons in the Lewis symbol for a phosphorus atom.

Using the table of bond dissociation energies, the OH for the following gas- phase reaction is KJ)

Which one of the following species has the electron configuration [Ar]3d4?

The electron configuration of the phosph?ide ion (P3- ) is .

Which of the elements below has the largest electronegativity?

The strength of a covalent bond is measured by its .

Why don't we draw double bonds between the Be atom and the Cl atoms in BeCl2?

In the resonance form of ozone shown below, the formal charge on the central oxygen atom is

Write the balanced chemical equation for the reaction for which OH°rxn is the lattice energy for potassium bromide.

Electron affinity is a measure of how strongly an atom can attract additional electrons.

A nonpolar bond will form between two _ _ atoms of electronegativity.

How many different types of resonance structures can be drawn for the ion SO32- where all atoms satisfy the octet rule ?

Draw the Lewis structure of ICl2+.

The formula of palladium(IV) sulfide is .

Of the atoms below, is the most electronegative.

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

How many unpaired electrons are there in an O²^-ion?

The ion NO^-has _ valence electrons.

Which one of the following species has the electron configuration [Ar]3d⁴?

The electron configuration of the phosph?ide ion (P³^-) is .

Why don't we draw double bonds between the Be atom and the Cl atoms in BeCl₂?

Write the balanced chemical equation for the reaction for which OH°_rxnis the lattice energy for potassium bromide.

How many different types of resonance structures can be drawn for the ion SO₃²^-where all atoms satisfy the octet rule ?

Draw the Lewis structure of ICl₂⁺.