Question 1

As the number of covalent bonds between two atoms increases, the distance between the atoms __________ and the strength of the bond between them __________.

Accepted Answer

A) increases, increases 
B) decreases, decreases 
C) increases, decreases 
D) decreases, increases 
E) is unpredictable 
A) increases, increases 
B) decreases, decreases 
C) increases, decreases 
D) decreases, increases 
E) is unpredictable D

Question 2

Dynamite __________.

Accepted Answer

A) was invented by Alfred Nobel 
B) is made of nitroglycerine and an absorbent such as diatomaceous earth 
C) is a much safer explosive than pure nitroglycerine 
D) is an explosive 
E) all of the above 
A) was invented by Alfred Nobel 
B) is made of nitroglycerine and an absorbent such as diatomaceous earth 
C) is a much safer explosive than pure nitroglycerine 
D) is an explosive 
E) all of the above E

Question 3

Elements from opposite sides of the periodic table tend to form __________.

Accepted Answer

A) covalent compounds 
B) ionic compounds 
C) compounds that are gaseous at room temperature 
D) homonuclear diatomic compounds 
E) covalent compounds that are gaseous at room temperature 
A) covalent compounds 
B) ionic compounds 
C) compounds that are gaseous at room temperature 
D) homonuclear diatomic compounds 
E) covalent compounds that are gaseous at room temperature B

Question 4

Which two bonds are least similar in polarity?

Accepted Answer

A) Al-Cl and I-Br 
B) O-F and Cl-F 
C) B-F and Cl-F 
D) I-Br and Si-Cl 
E) C-Cl and Ge-Cl 
A) Al-Cl and I-Br 
B) O-F and Cl-F 
C) B-F and Cl-F 
D) I-Br and Si-Cl 
E) C-Cl and Ge-Cl

Question 5

Given that the average bond energies for C-H and C-Br bonds are 413 and 276 kJ/mol, respectively, the heat of atomization of bromoform (CHBr3)is __________ kJ/mol.

Accepted Answer

A) 1241 
B) 689 
C) -689 
D) 1378 
E) -1378 
A) 1241 
B) 689 
C) -689 
D) 1378 
E) -1378

Question 6

How many equivalent resonance structures can be drawn for the molecule of SO3 without having to violate the octet rule on the sulfur atom?

Accepted Answer

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

Question 7

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 8

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 9

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

Accepted Answer

A) [Ne]3s2 
B) [Ne]3s23Pl 
C) [Ne]3s23P3 
D) [Ne]3P2 
E) [Ne]3s23P6 
A) [Ne]3s2 
B) [Ne]3s23Pl 
C) [Ne]3s23P3 
D) [Ne]3P2 
E) [Ne]3s23P6

Question 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

In ionic bond formation, the lattice energy of ions ________ as the magnitude of the ion charges _______ and the radii __________.

Accepted Answer

A) increases, decrease, increase 
B) increases, increase, increase 
C) decreases, increase, increase 
D) increases, increase, decrease 
E) increases, decrease, decrease 
A) increases, decrease, increase 
B) increases, increase, increase 
C) decreases, increase, increase 
D) increases, increase, decrease 
E) increases, decrease, decrease

Question 13

Resonance structures differ by __________.

Accepted Answer

A) number and placement of electrons 
B) number of electrons only 
C) placement of atoms only 
D) number of atoms only 
E) placement of electrons only 
A) number and placement of electrons 
B) number of electrons only 
C) placement of atoms only 
D) number of atoms only 
E) placement of electrons only

Question 14

A valid Lewis structure of __________ cannot be drawn without violating the octet rule.

Accepted Answer

A) NF3 
B) BeH2 
C) SO2 
D) CF4 
E) SO32- 
A) NF3 
B) BeH2 
C) SO2 
D) CF4 
E) SO32-

Question 15

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 16

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

Accepted Answer

A) True 
 B)False

Question 17

What species has the electron configuration [Ar]3d2?

Accepted Answer

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

Question 18

Benzene is an __________ compound with __________ equivalent Lewis structures.

Accepted Answer

The answer of Benzene is an __________ compound with __________...

Question 19

The formal charge on nitrogen in NO3- is __________.

Accepted Answer

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

Question 20

Bond enthalpy can be positive or negative.

Accepted Answer

A) True 
 B)False

Exam 8: Basic Concepts of Chemical Bonding

As the number of covalent bonds between two atoms increases, the distance between the atoms __________ and the strength of the bond between them __________.

Dynamite __________.

Elements from opposite sides of the periodic table tend to form __________.

Which two bonds are least similar in polarity?

Given that the average bond energies for C-H and C-Br bonds are 413 and 276 kJ/mol, respectively, the heat of atomization of bromoform (CHBr3)is __________ kJ/mol.

How many equivalent resonance structures can be drawn for the molecule of SO3 without having to violate the octet rule on the sulfur atom?

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

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

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

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

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

In ionic bond formation, the lattice energy of ions ________ as the magnitude of the ion charges _______ and the radii __________.

Resonance structures differ by __________.

A valid Lewis structure of __________ cannot be drawn without violating the octet rule.

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

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

What species has the electron configuration [Ar]3d2?

Benzene is an __________ compound with __________ equivalent Lewis structures.

The formal charge on nitrogen in NO3- is __________.

Bond enthalpy can be positive or negative.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

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

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As the number of covalent bonds between two atoms increases, the distance between the atoms and the strength of the bond between them .

Given that the average bond energies for C-H and C-Br bonds are 413 and 276 kJ/mol, respectively, the heat of atomization of bromoform (CHBr₃)is __________ kJ/mol.

How many equivalent resonance structures can be drawn for the molecule of SO₃ without having to violate the octet rule on the sulfur atom?

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

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

In ionic bond formation, the lattice energy of ions ____ as the magnitude of the ion charges _ and the radii ________.

What species has the electron configuration [Ar]3d²?

Benzene is an compound with equivalent Lewis structures.

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