Question 1

What is the maximum number of triple bonds that a carbon atom can form?

Accepted Answer

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

Question 2

The electron configuration of the P3- ion is ________.

Accepted Answer

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

Question 3

The ion PO43- has ________ valence electrons.

Accepted Answer

A) 14 
B) 24 
C) 27 
D) 29 
E) 32 
A) 14 
B) 24 
C) 27 
D) 29 
E) 32

Question 4

Which of the following atoms may have an expansion to the octet?

Accepted Answer

A) P 
B) C 
C) H 
D) O 
E) B 
A) P 
B) C 
C) H 
D) O 
E) B

Question 5

There are ________ valence electrons in the Lewis structure of CH3Cl.

Accepted Answer

A) 14 
B) 16 
C) 18 
D) 20 
E) 22 
A) 14 
B) 16 
C) 18 
D) 20 
E) 22

Question 6

Which of the following Lewis structures would be an expansion to the octet rule?

Accepted Answer

A) PH3 
B) PCl3 
C) CCl4 
D) CO2 
E) SO3 
A) PH3 
B) PCl3 
C) CCl4 
D) CO2 
E) SO3

Question 7

When a metal gains an electron,the process is endothermic.

Accepted Answer

A) True 
 B)False

Question 8

How many electrons are in the Lewis structure of a nitrite ion (NO2-)?

Accepted Answer

A) 18 
B) 17 
C) 16 
D) 23 
E) 24 
A) 18 
B) 17 
C) 16 
D) 23 
E) 24

Question 9

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 10

Which of the following would have to lose three electrons in order to achieve a noble gas electron configuration?
Si Mg Al Cl P

Accepted Answer

A) Si, P 
B) Al 
C) P 
D) Cl 
E) Mg, Al, P 
A) Si, P 
B) Al 
C) P 
D) Cl 
E) Mg, Al, P

Question 11

Write the balanced chemical equation for the reaction for which △H°rxn is the lattice energy for sodium chloride.

Accepted Answer

NaCl (s)→

Question 12

The Lewis structure of N2H2 shows ________.

Accepted Answer

A) a nitrogen-nitrogen triple bond 
B) a nitrogen-nitrogen single bond 
C) each nitrogen has one nonbonding electron pair 
D) each nitrogen has two nonbonding electron pairs 
E) each hydrogen has one nonbonding electron pair 
A) a nitrogen-nitrogen triple bond 
B) a nitrogen-nitrogen single bond 
C) each nitrogen has one nonbonding electron pair 
D) each nitrogen has two nonbonding electron pairs 
E) each hydrogen has one nonbonding electron pair

Question 13

The ion ICl4- has ________ valence electrons.

Accepted Answer

A) 34 
B) 35 
C) 36 
D) 28 
E) 8 
A) 34 
B) 35 
C) 36 
D) 28 
E) 8

Question 14

Which of the following Lewis structures would be an incomplete octet?

Accepted Answer

A) NF3 
B) SO2 
C) BCl3 
D) CF4 
E) SO32- 
A) NF3 
B) SO2 
C) BCl3 
D) CF4 
E) SO32-

Question 15

Of the molecules below,the bond in ________ is the most polar.

Accepted Answer

A) HBr 
B) HI 
C) HCl 
D) HF 
E) H2 
A) HBr 
B) HI 
C) HCl 
D) HF 
E) H2

Question 16

The reaction below is used to produce methanol: CO (g)+ 2H2 (g)→ CH3OH (l)△Hrxn = -128 kJ
(a)Calculate the C-H bond energy given the following data:   (b)The tabulated value of the (C-H)bond energy is 413 kJ/mol.Explain why there is a difference between the number you have calculated in (a)and the tabulated value.

Accepted Answer

(A)△H_RXN= D(C≡O)+ 2 D(H-H)- [3 D(C-H)+ D(C-

Question 17

From the information given below,calculate the heat of combustion of methane.Start by writing the balanced equation.

Accepted Answer

The answer of From the information given below,calculate the heat...

Question 18

Which of the following has eight valence electrons?

Accepted Answer

A) Ti4+ 
B) Kr 
C) Cl- 
D) Na+ 
E) all of the above 
A) Ti4+ 
B) Kr 
C) Cl- 
D) Na+ 
E) all of the above

Question 19

Most transition metals do not form ions with a noble gas configuration.

Accepted Answer

A) True 
 B)False

Question 20

How many valence electrons are in the Lewis structure of CH3OCH3.?

Accepted Answer

A) 16 
B) 18 
C) 20 
D) 24 
E) 22 
A) 16 
B) 18 
C) 20 
D) 24 
E) 22

Exam 8: Basic Concepts of Chemical Bonding

What is the maximum number of triple bonds that a carbon atom can form?

The electron configuration of the P3- ion is ________.

The ion PO43- has ________ valence electrons.

Which of the following atoms may have an expansion to the octet?

There are ________ valence electrons in the Lewis structure of CH3Cl.

Which of the following Lewis structures would be an expansion to the octet rule?

When a metal gains an electron,the process is endothermic.

How many electrons are in the Lewis structure of a nitrite ion (NO2-)?

Resonance structures differ by ________.

Which of the following would have to lose three electrons in order to achieve a noble gas electron configuration? Si Mg Al Cl P

Write the balanced chemical equation for the reaction for which △H°rxn is the lattice energy for sodium chloride.

The Lewis structure of N2H2 shows ________.

The ion ICl4- has ________ valence electrons.

Which of the following Lewis structures would be an incomplete octet?

Of the molecules below,the bond in ________ is the most polar.

From the information given below,calculate the heat of combustion of methane.Start by writing the balanced equation.

Which of the following has eight valence electrons?

Most transition metals do not form ions with a noble gas configuration.

How many valence electrons are in the Lewis structure of CH3OCH3.?

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

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

The ion PO₄^3-has ________ valence electrons.

There are ________ valence electrons in the Lewis structure of CH₃Cl.

How many electrons are in the Lewis structure of a nitrite ion (NO₂^-)?

Write the balanced chemical equation for the reaction for which △H°_rxn is the lattice energy for sodium chloride.

The Lewis structure of N₂H₂ shows ________.

The ion ICl₄^- has ________ valence electrons.

How many valence electrons are in the Lewis structure of CH₃OCH₃.?