Question 1

Using the table of bond dissociation energies,the ΔH for the reverse of following gas-phase reaction is ________ kJ.

Accepted Answer

A) +57 
B) +291 
C) 2017 
D) -57 
E) -291 
A) +57 
B) +291 
C) 2017 
D) -57 
E) -291

Question 2

To convert from one resonance structure to another,________.

Accepted Answer

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

Question 3

Based on the octet rule,aluminum most likely forms an ________ ion.

Accepted Answer

A) Al3+ 
B) Al4+ 
C) Al4- 
D) Al+ 
E) Al- 
A) Al3+ 
B) Al4+ 
C) Al4- 
D) Al+ 
E) Al-

Question 4

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 5

Of the possible bonds between carbon atoms (single,double,and triple),________.

Accepted Answer

A) a triple bond is longer than a single bond 
B) a double bond is stronger than a triple bond 
C) a single bond is stronger than a triple bond 
D) a double bond is longer than a triple bond 
E) a single bond is stronger than a double bond 
A) a triple bond is longer than a single bond 
B) a double bond is stronger than a triple bond 
C) a single bond is stronger than a triple bond 
D) a double bond is longer than a triple bond 
E) a single bond is stronger than a double bond

Question 6

What species has the electron configuration [Ar]3d4?

Accepted Answer

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

Question 7

There can be two equivalent best resonance structures of ________.

Accepted Answer

A) (i) 
B) (ii) 
C) (iii) 
D) (iv) 
E) (v) 
A) (i) 
B) (ii) 
C) (iii) 
D) (iv) 
E) (v)

Question 8

Which of the following does not have eight valence electrons?

Accepted Answer

A) Cl- 
B) Xe 
C) Ti+4 
D) Rb+ 
E) Sr+ 
A) Cl- 
B) Xe 
C) Ti+4 
D) Rb+ 
E) Sr+

Question 9

The oxide of which of the following metals should have the greatest lattice energy?

Accepted Answer

A) calcium 
B) strontium 
C) magnesium 
D) beryllium 
E) barium 
A) calcium 
B) strontium 
C) magnesium 
D) beryllium 
E) barium

Question 10

Which of the following species does the noble gas electron configuration [Kr]4d10 represent?

Accepted Answer

A) Cd 
B) Cd+ 
C) Ag+ 
D) Ag2+ 
E) Sr2+ 
A) Cd 
B) Cd+ 
C) Ag+ 
D) Ag2+ 
E) Sr2+

Question 11

The electron configuration of the phosphide ion (P3-)is ________.

Accepted Answer

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

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

How many single covalent bonds must a chlorine atom form to have a complete octet in its valence shell?

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

Electronegativity ________ from left to right within a period and ________ from top to bottom within a group.

Accepted Answer

A) decreases, increases 
B) increases, increases 
C) increases, decreases 
D) stays the same, increases 
E) increases, stays the same 
A) decreases, increases 
B) increases, increases 
C) increases, decreases 
D) stays the same, increases 
E) increases, stays the same

Question 16

The ion NO- has ________ valence electrons.

Accepted Answer

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

Question 17

Calculate the bond energy of C-F given that the heat of atomization of CHFClBr is 1502 kJ/mol,and that the bond energies of C-H,C-Br,and C-Cl are 413,276,and 328 kJ/mol,respectively.

Accepted Answer

ΔH_atomization = [D(C-H)+ D(C-F)+ D(C-Cl)+

Question 18

The type of compound that is most likely to contain a covalent bond is ________.

Accepted Answer

A) one that is composed of a metal from the far left of the periodic table and a nonmetal from the far right of the periodic table 
B) a solid metal 
C) one that is composed of only nonmetals 
D) held together by the electrostatic forces between oppositely charged ions 
E) There is no general rule to predict covalency in bonds. 
A) one that is composed of a metal from the far left of the periodic table and a nonmetal from the far right of the periodic table 
B) a solid metal 
C) one that is composed of only nonmetals 
D) held together by the electrostatic forces between oppositely charged ions 
E) There is no general rule to predict covalency in bonds.

Question 19

Which energy change corresponds to the electron affinity of fluorine?

Accepted Answer

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

Question 20

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

Exam 8: Basic Concepts of Chemical Bonding

Using the table of bond dissociation energies,the ΔH for the reverse of following gas-phase reaction is ________ kJ.

To convert from one resonance structure to another,________.

Based on the octet rule,aluminum most likely forms an ________ ion.

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

Of the possible bonds between carbon atoms (single,double,and triple),________.

What species has the electron configuration [Ar]3d4?

There can be two equivalent best resonance structures of ________.

Which of the following does not have eight valence electrons?

The oxide of which of the following metals should have the greatest lattice energy?

Which of the following species does the noble gas electron configuration [Kr]4d10 represent?

The electron configuration of the phosphide ion (P3-)is ________.

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

How many single covalent bonds must a chlorine atom form to have a complete octet in its valence shell?

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

Electronegativity ________ from left to right within a period and ________ from top to bottom within a group.

The ion NO- has ________ valence electrons.

Calculate the bond energy of C-F given that the heat of atomization of CHFClBr is 1502 kJ/mol,and that the bond energies of C-H,C-Br,and C-Cl are 413,276,and 328 kJ/mol,respectively.

The type of compound that is most likely to contain a covalent bond is ________.

Which energy change corresponds to the electron affinity of fluorine?

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

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

What species has the electron configuration [Ar]3d⁴?

Which of the following species does the noble gas electron configuration [Kr]4d¹⁰ represent?

The electron configuration of the phosphide ion (P^3-)is ________.

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

Electronegativity from left to right within a period and from top to bottom within a group.

The ion NO^- has ________ valence electrons.

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