Question 1

The number of resonance structures for the nitrate ion that satisfy the octet rule is

Accepted Answer

A) 1. 
B) 2. 
C) 3. 
D) 4. 
E) none of these 
A) 1. 
B) 2. 
C) 3. 
D) 4. 
E) none of these C

Question 2

What is the formal charge on phosphorus in a Lewis structure for the phosphate ion that satisfies the octet rule?

Accepted Answer

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

Question 3

All of the following molecules contain only single bonds except

Accepted Answer

A) H2O2. 
B) Cl2. 
C) CH4. 
D) H2O. 
E) SO2. 
A) H2O2. 
B) Cl2. 
C) CH4. 
D) H2O. 
E) SO2. E

Question 4

Describe in brief how electronegativity values can be used to predict the percent ionic character of a bond between two atoms.

Accepted Answer

Take the electronegativity difference (Δ

Question 5

In the Lewis structure of the iodate ion,IO3-,that satisfies the octet rule,the formal charge on the central iodine atom is

Accepted Answer

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

Question 6

How many dots does the Lewis dot symbol for chlorine have around it?

Accepted Answer

A) 1 
B) 2 
C) 5 
D) 7 
E) 17 
A) 1 
B) 2 
C) 5 
D) 7 
E) 17

Question 7

In which of the following species does the central atom violate the octet rule?

Accepted Answer

A) CH4 
B) SF4 
C) PCl4+ 
D) CCl3+ 
E) NH3 
A) CH4 
B) SF4 
C) PCl4+ 
D) CCl3+ 
E) NH3

Question 8

Which of the following represents the most polar bond?

Accepted Answer

A) B-C 
B) S-O 
C) C-O 
D) B-O 
E) C-C 
A) B-C 
B) S-O 
C) C-O 
D) B-O 
E) C-C

Question 9

What is the formal charge on the fluorine in ClF2+?

Accepted Answer

A) -1 
B) +1 
C) 0 
D) -2 
E) -3 
A) -1 
B) +1 
C) 0 
D) -2 
E) -3

Question 10

In the following Lewis structure for ClO3F,chlorine has a formal charge of ____ and an oxidation number of ____.

Accepted Answer

A) 7,7 
B) 7,-1 
C) 1,1 
D) 1,-1 
E) 1,7 
A) 7,7 
B) 7,-1 
C) 1,1 
D) 1,-1 
E) 1,7

Question 11

How many single bonds are bonded to sulfur in SF6?

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 7 
E) 8 
A) 2 
B) 4 
C) 6 
D) 7 
E) 8

Question 12

In which one of the following structures does the central atom have a formal charge of +2?

Accepted Answer

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

Question 13

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s).What does the dot or dots represent?

Accepted Answer

A) Electron configuration 
B) Valence electrons 
C) Atomic number 
D) Atomic mass 
E) Core electrons 
A) Electron configuration 
B) Valence electrons 
C) Atomic number 
D) Atomic mass 
E) Core electrons

Question 14

A triple bond arises when two atoms share ___________ pairs of electrons.

Accepted Answer

The answer of A triple bond arises when two atoms...

Question 15

How many dots does the Lewis dot symbol for sodium have around it?

Accepted Answer

A) 1 
B) 2 
C) 0 
D) 3 
E) 7 
A) 1 
B) 2 
C) 0 
D) 3 
E) 7

Question 16

Ionic compounds may carry a net positive or net negative charge.

Accepted Answer

A) True 
 B)False

Question 17

Describe,with appropriate explanations,the key factors which affect the magnitude of the lattice energy of an ionic substance.

Accepted Answer

By Coulomb's law,the energy of two elect

Question 18

A double bond cannot exist between a carbon atom and an oxygen atom.

Accepted Answer

A) True 
 B)False

Question 19

Identify the correct equation to calculate the formal charge on an atom.

Accepted Answer

A) formal charge = valence electrons - lone pair electrons 
B) formal charge = valence electrons - associated electrons 
C) formal charge = valence electrons - bonding electrons 
D) formal charge = bonding electrons + lone pair electrons 
E) formal charge = valence electrons - bonding electrons + lone pair electrons 
A) formal charge = valence electrons - lone pair electrons 
B) formal charge = valence electrons - associated electrons 
C) formal charge = valence electrons - bonding electrons 
D) formal charge = bonding electrons + lone pair electrons 
E) formal charge = valence electrons - bonding electrons + lone pair electrons

Question 20

Which one of the following Lewis structures is definitely incorrect?

Accepted Answer

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

Exam 8: Chemical Bonding I Basic Concepts

The number of resonance structures for the nitrate ion that satisfy the octet rule is

What is the formal charge on phosphorus in a Lewis structure for the phosphate ion that satisfies the octet rule?

All of the following molecules contain only single bonds except

Describe in brief how electronegativity values can be used to predict the percent ionic character of a bond between two atoms.

In the Lewis structure of the iodate ion,IO3-,that satisfies the octet rule,the formal charge on the central iodine atom is

How many dots does the Lewis dot symbol for chlorine have around it?

In which of the following species does the central atom violate the octet rule?

Which of the following represents the most polar bond?

What is the formal charge on the fluorine in ClF2+?

In the following Lewis structure for ClO3F,chlorine has a formal charge of ____ and an oxidation number of ____.

How many single bonds are bonded to sulfur in SF6?

In which one of the following structures does the central atom have a formal charge of +2?

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s).What does the dot or dots represent?

A triple bond arises when two atoms share ___________ pairs of electrons.

How many dots does the Lewis dot symbol for sodium have around it?

Ionic compounds may carry a net positive or net negative charge.

Describe,with appropriate explanations,the key factors which affect the magnitude of the lattice energy of an ionic substance.

A double bond cannot exist between a carbon atom and an oxygen atom.

Identify the correct equation to calculate the formal charge on an atom.

Which one of the following Lewis structures is definitely incorrect?

Chemistry: the Central Science

Atoms Molecules and Ions

Stoichiometry Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding Ii Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

In the Lewis structure of the iodate ion,IO₃^-,that satisfies the octet rule,the formal charge on the central iodine atom is

What is the formal charge on the fluorine in ClF₂⁺?

In the following Lewis structure for ClO₃F,chlorine has a formal charge of and an oxidation number of .

How many single bonds are bonded to sulfur in SF₆?