Question 1

How many equivalent resonance forms can be drawn for CO32-? (Carbon is the central atom.)

Accepted Answer

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

Question 2

If more than one Lewis structure can be drawn then the molecule or ion is said to have ________ forms.

Accepted Answer

The answer of If more than one Lewis structure can...

Question 3

________ is an explosive made of nitroglycerine and an absorbent such as diatomaceous earth.

Accepted Answer

A) KOH 
B) TNT 
C) C-4 
D) KBr 
E) CFC 
A) KOH 
B) TNT 
C) C-4 
D) KBr 
E) CFC

Question 4

The electron configuration of the S2- ion is ________.

Accepted Answer

A) [Ar]3s23p6 
B) [Ar]3s23p2 
C) [Ne]3s23p2 
D) [Ne]3s23p6 
E) [Kr]3s22p6 
A) [Ar]3s23p6 
B) [Ar]3s23p2 
C) [Ne]3s23p2 
D) [Ne]3s23p6 
E) [Kr]3s22p6

Question 5

The formal charge on nitrogen in NO3- is ________,where the Lewis structure of the ion is:

Accepted Answer

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

Question 6

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

Question 7

Using the Born-Haber cycle,the ΔH°f of KBr is equal to ________.

Accepted Answer

A) ΔH°f [K (g)] + ΔH°f [Br (g)] + I1(K)+ E(Br)+ ΔHlattice 
B) ΔH°f [K (g)] - ΔH°f [Br (g)] - I1(K)- E(Br)- ΔHlattice 
C) ΔH°f [K (g)] - ΔH°f [Br (g)] + I1(K)- E(Br)+ ΔHlattice 
D) ΔH°f [K (g)] + ΔH°f [Br (g)] - I1 - E(Br)+ ΔHlattice 
E) ΔH°f [K (g)] + ΔH°f [Br (g)] + I1(K)+ E(Br)- ΔHlattice 
A) ΔH°f [K (g)] + ΔH°f [Br (g)] + I1(K)+ E(Br)+ ΔHlattice 
B) ΔH°f [K (g)] - ΔH°f [Br (g)] - I1(K)- E(Br)- ΔHlattice 
C) ΔH°f [K (g)] - ΔH°f [Br (g)] + I1(K)- E(Br)+ ΔHlattice 
D) ΔH°f [K (g)] + ΔH°f [Br (g)] - I1 - E(Br)+ ΔHlattice 
E) ΔH°f [K (g)] + ΔH°f [Br (g)] + I1(K)+ E(Br)- ΔHlattice

Question 8

For a given arrangement of ions,the lattice energy increases as ionic radius ________ and as ionic charge ________.

Accepted Answer

A) decreases, increases 
B) increases, decreases 
C) increases, increases 
D) decreases, decreases 
E) This cannot be predicted. 
A) decreases, increases 
B) increases, decreases 
C) increases, increases 
D) decreases, decreases 
E) This cannot be predicted.

Question 9

Dynamite consists of nitroglycerine mixed with diatomaceous earth or cellulose.What is another name for dynamite?

Accepted Answer

A) KBr 
B) KOH 
C) TNT 
D) C-4 
E) CFC 
A) KBr 
B) KOH 
C) TNT 
D) C-4 
E) CFC

Question 10

The central atom in ________ violates the octet rule.

Accepted Answer

A) PF5 
B) SF2 
C) Cl2 
D) Br2CO 
E) FCN 
A) PF5 
B) SF2 
C) Cl2 
D) Br2CO 
E) FCN

Question 11

The only noble gas without eight valence electrons is ________.

Accepted Answer

A) Ar 
B) Ne 
C) He 
D) Kr 
E) All noble gases have eight valence electrons. 
A) Ar 
B) Ne 
C) He 
D) Kr 
E) All noble gases have eight valence electrons.

Question 12

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

Accepted Answer

A) NF3 
B) IF3 
C) PF3 
D) SbF3 
E) SO42- 
A) NF3 
B) IF3 
C) PF3 
D) SbF3 
E) SO42-

Question 13

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

Question 14

Which of the following does not have eight valence electrons?

Accepted Answer

A) Ca+ 
B) Rb+ 
C) Xe 
D) Br- 
E) All of the above have eight valence electrons. 
A) Ca+ 
B) Rb+ 
C) Xe 
D) Br- 
E) All of the above have eight valence electrons.

Question 15

How many resonance forms exist for benzene?

Accepted Answer

The answer of How many resonance forms exist for benzene?...

Question 16

How many equivalent resonance forms can be drawn for the nitrate ion?

Accepted Answer

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

Question 17

The oxidation number of phosphorus in PF5 is ________.

Accepted Answer

A) +5 
B) +3 
C) +1 
D) -5 
E) 0 
A) +5 
B) +3 
C) +1 
D) -5 
E) 0

Question 18

For ________ forms of a molecule or ion,the observed structure is an average of the ________ forms.

Accepted Answer

A) resonance, covalent 
B) resonance, resonance 
C) ionic, resonance 
D) resonance, ionic 
E) resonance, metallic 
A) resonance, covalent 
B) resonance, resonance 
C) ionic, resonance 
D) resonance, ionic 
E) resonance, metallic

Question 19

Using the table of average bond energies below,the ΔH for the reaction is ________ kJ.   Bond: C≡C C-C H-I C-I C-H D (kJ/mol): 839 348 299 240 413

Accepted Answer

A) +160 
B) -160 
C) -217 
D) -63 
E) +63 
A) +160 
B) -160 
C) -217 
D) -63 
E) +63

Question 20

Give the electron configuration of Zn2+.

Accepted Answer

Exam 8: Basic Concepts of Chemical Bonding

How many equivalent resonance forms can be drawn for CO32-? (Carbon is the central atom.)

If more than one Lewis structure can be drawn then the molecule or ion is said to have ________ forms.

________ is an explosive made of nitroglycerine and an absorbent such as diatomaceous earth.

The electron configuration of the S2- ion is ________.

The formal charge on nitrogen in NO3- is ________,where the Lewis structure of the ion is:

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

Using the Born-Haber cycle,the ΔH°f of KBr is equal to ________.

For a given arrangement of ions,the lattice energy increases as ionic radius ________ and as ionic charge ________.

Dynamite consists of nitroglycerine mixed with diatomaceous earth or cellulose.What is another name for dynamite?

The central atom in ________ violates the octet rule.

The only noble gas without eight valence electrons is ________.

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

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

Which of the following does not have eight valence electrons?

How many resonance forms exist for benzene?

How many equivalent resonance forms can be drawn for the nitrate ion?

The oxidation number of phosphorus in PF5 is ________.

For ________ forms of a molecule or ion,the observed structure is an average of the ________ forms.

Using the table of average bond energies below,the ΔH for the reaction is ________ kJ. Bond: C≡C C-C H-I C-I C-H D (kJ/mol): 839 348 299 240 413

Give the electron configuration of Zn2+.

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

How many equivalent resonance forms can be drawn for CO₃^2-? (Carbon is the central atom.)

The electron configuration of the S^2- ion is ________.

The formal charge on nitrogen in NO₃^- is ________,where the Lewis structure of the ion is:

Using the Born-Haber cycle,the ΔH°_f of KBr is equal to ________.

For a given arrangement of ions,the lattice energy increases as ionic radius and as ionic charge .

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

The oxidation number of phosphorus in PF₅ is ________.

For forms of a molecule or ion,the observed structure is an average of the forms.

Give the electron configuration of Zn²⁺.