Question 1

Which of the following ions is a polyatomic ion?

Accepted Answer

A)  NH4+ 
B)  Mg2+ 
C)  O2- 
D)  O2 
E)  C2H6 
A)  NH4+ 
B)  Mg2+ 
C)  O2- 
D)  O2 
E)  C2H6

Question 2

Which bonds in caffeine are polar covalent bonds?

Accepted Answer

A)  All of them 
B)  the C-N bonds only 
C)  the C=C, C-C and C-H bonds 
D)  the C-N, C=O, and C=N bonds 
E)  the O-H bonds 
A)  All of them 
B)  the C-N bonds only 
C)  the C=C, C-C and C-H bonds 
D)  the C-N, C=O, and C=N bonds 
E)  the O-H bonds

Question 3

An important part of writing a formula unit for an ionic compound is to make sure that

Accepted Answer

A)  the charges of the ions add up to zero. 
B)  there is never more than one type of cation and one type of anion in the formula. 
C)  the ionic compound actually exists in nature. 
D)  the anion is written first, followed by the cation. 
E)  the ratio of cation to anion is 1:1. 
A)  the charges of the ions add up to zero. 
B)  there is never more than one type of cation and one type of anion in the formula. 
C)  the ionic compound actually exists in nature. 
D)  the anion is written first, followed by the cation. 
E)  the ratio of cation to anion is 1:1.

Question 4

Which of the following molecules contains polar bonds but is nonpolar overall?

Accepted Answer

A)  Cl2 
B)  CF4 
C)  H2O 
D)  N2 
E)  NH3 
A)  Cl2 
B)  CF4 
C)  H2O 
D)  N2 
E)  NH3

Question 5

Nonmetals typically ______ and metals typically ______.

Accepted Answer

A)  donate electrons; accept electrons 
B)  accept electrons; donate electrons 
C)  donate protons; accept protons 
D)  accept protons; donate protons 
E)  donate neutrons; accept neutrons 
A)  donate electrons; accept electrons 
B)  accept electrons; donate electrons 
C)  donate protons; accept protons 
D)  accept protons; donate protons 
E)  donate neutrons; accept neutrons

Question 6

Antiestrogens are one type of molecule that can be used to treat breast cancer. Which of the following characteristics should be included in the design of a novel antiestrogen?

Accepted Answer

A)  The molecule should bind to the estrogen receptor on breast cancer cells. 
B)  The molecule should not interfere with the normal role of estrogen. 
C)  The molecule should prevent the activation of genes in breast cancer cells. 
D)  The molecule should not have negative side effects. 
E)  All of the above are design considerations. 
A)  The molecule should bind to the estrogen receptor on breast cancer cells. 
B)  The molecule should not interfere with the normal role of estrogen. 
C)  The molecule should prevent the activation of genes in breast cancer cells. 
D)  The molecule should not have negative side effects. 
E)  All of the above are design considerations.

Question 7

Does chloroform (CHCl3) contain polar bonds?

Accepted Answer

A)  Yes, all of the bonds in chloroform are polar. 
B)  Yes, the C-Cl bond in chloroform is polar. 
C)  Yes, the C-H bond in chloroform is polar. 
D)  Yes, all atoms in chloroform are highly electronegative. 
E)  No, all bonds in chloroform are nonpolar. 
A)  Yes, all of the bonds in chloroform are polar. 
B)  Yes, the C-Cl bond in chloroform is polar. 
C)  Yes, the C-H bond in chloroform is polar. 
D)  Yes, all atoms in chloroform are highly electronegative. 
E)  No, all bonds in chloroform are nonpolar.

Question 8

What are the charges on the ions that make up this lattice of lithium (the larger spheres) and oxygen (the smaller spheres) in Li2O?

Accepted Answer

A)  Li has a F1F1F1S1F1F1F101 charge and O has a +1 charge. 
B)  Li has a +1 charge and O has a F1F1F1S1F1F1F101 charge. 
C)  Li has a F1F1F1S1F1F1F101 charge and O has a +2 charge. 
D)  Li has a +1 charge and O has a F1F1F1S1F1F1F102 charge. 
E)  Neither lithium nor oxygen is charged. 
A)  Li has a F1F1F1S1F1F1F101 charge and O has a +1 charge. 
B)  Li has a +1 charge and O has a F1F1F1S1F1F1F101 charge. 
C)  Li has a F1F1F1S1F1F1F101 charge and O has a +2 charge. 
D)  Li has a +1 charge and O has a F1F1F1S1F1F1F102 charge. 
E)  Neither lithium nor oxygen is charged.

Question 9

How many nonbonding electrons are in the chloroethylene molecule (C2H3Cl)?

Accepted Answer

A)  None 
B)  6 
C)  8 
D)  10 
E)  18 
A)  None 
B)  6 
C)  8 
D)  10 
E)  18

Question 10

Which of the following statements best describes the behavior of period 2 elements in a covalent molecule?

Accepted Answer

A)  Period 2 elements lose electrons. 
B)  Period 2 elements gain electrons. 
C)  The nonmetals in period 2 form bonds so that they have a valence shell with eight electrons. 
D)  The nonmetals in period 2 form bonds so that they have a valence shell with two electrons. 
E)  Period 2 elements are not alike in any way. 
A)  Period 2 elements lose electrons. 
B)  Period 2 elements gain electrons. 
C)  The nonmetals in period 2 form bonds so that they have a valence shell with eight electrons. 
D)  The nonmetals in period 2 form bonds so that they have a valence shell with two electrons. 
E)  Period 2 elements are not alike in any way.

Question 11

Formaldehyde is used as a preservative and in disinfection. It has the structure shown below. What is the strongest type of intermolecular interaction attracting molecules of formaldehyde together?

Accepted Answer

A)  ionic bonding 
B)  covalent bonding 
C)  dispersion forces 
D)  dipole-dipole forces 
E)  hydrogen bonding forces 
A)  ionic bonding 
B)  covalent bonding 
C)  dispersion forces 
D)  dipole-dipole forces 
E)  hydrogen bonding forces

Question 12

Ethylene is used as a starting material in making plastics. It has a molecular formula of C2H4. Which of the following structures is the correct Lewis dot structure for ethylene?

Accepted Answer

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

Question 13

What ionic compound has the formula Na2O?

Accepted Answer

A)  disodium oxide 
B)  sodium oxide 
C)  sodium dioxide 
D)  sodium oxygen 
E)  disodium oxygen 
A)  disodium oxide 
B)  sodium oxide 
C)  sodium dioxide 
D)  sodium oxygen 
E)  disodium oxygen

Question 14

What is the electron geometry of the oxygen in methanol, shown below?

Accepted Answer

A)  linear 
B)  bent 
C)  trigonal planar 
D)  trigonal pyramidal 
E)  tetrahedral 
A)  linear 
B)  bent 
C)  trigonal planar 
D)  trigonal pyramidal 
E)  tetrahedral

Question 15

Magnesium chloride is sometimes administered orally to suppress premature labor. Which of the following is a valid ionic formula for magnesium chloride?

Accepted Answer

A)  Mg2Cl2 
B)  Mg2Cl 
C)  MgCl 
D)  MgCl2 
E)  None of the above choices are magnesium chloride. 
A)  Mg2Cl2 
B)  Mg2Cl 
C)  MgCl 
D)  MgCl2 
E)  None of the above choices are magnesium chloride.

Question 16

Which elements have the highest electronegativity and why?

Accepted Answer

A)  The nonmetals, because they accept electrons in order to attain an octet 
B)  The metals, because they accept electrons in order to attain an octet 
C)  The nonmetals, because they donate electrons in order to attain an octet 
D)  The metals, because they donate electrons in order to attain an octet 
E)  The transition metals, because they can have different charges 
A)  The nonmetals, because they accept electrons in order to attain an octet 
B)  The metals, because they accept electrons in order to attain an octet 
C)  The nonmetals, because they donate electrons in order to attain an octet 
D)  The metals, because they donate electrons in order to attain an octet 
E)  The transition metals, because they can have different charges

Question 17

Why are there many different ways to model and draw molecules?

Accepted Answer

A)  There is no reason for this except to confuse students. 
B)  Each type of model and way of drawing communicates different characteristics of an actual molecule. 
C)  In different parts of the world, molecules are drawn differently. 
D)  As our understanding of the atom changed over time, we developed more accurate ways of drawing atoms and molecules. 
E)  Actually, there is currently only one correct way to draw or model a molecule. 
A)  There is no reason for this except to confuse students. 
B)  Each type of model and way of drawing communicates different characteristics of an actual molecule. 
C)  In different parts of the world, molecules are drawn differently. 
D)  As our understanding of the atom changed over time, we developed more accurate ways of drawing atoms and molecules. 
E)  Actually, there is currently only one correct way to draw or model a molecule.

Question 18

What is the charge on each chlorine in an ionic compound composed of calcium and chlorine?

Accepted Answer

A)  +1 
B)  (F1F1F1S1F1F1F101) 
C)  +2 
D)  (F1F1F1S1F1F1F102) 
E)  +3 
A)  +1 
B)  (F1F1F1S1F1F1F101) 
C)  +2 
D)  (F1F1F1S1F1F1F102) 
E)  +3

Question 19

In this diagram showing the boiling of liquid water, Arrow A points to

Accepted Answer

A)  a covalent bond. 
B)  a hydrogen bonding force. 
C)  a dispersion force. 
D)  a molecule. 
E)  heat. 
A)  a covalent bond. 
B)  a hydrogen bonding force. 
C)  a dispersion force. 
D)  a molecule. 
E)  heat.

Question 20

Which of the following elements is the most electronegative?

Accepted Answer

A)  fluorine 
B)  bromine 
C)  chlorine 
D)  iodine 
E)  boron 
A)  fluorine 
B)  bromine 
C)  chlorine 
D)  iodine 
E)  boron

Which of the following ions is a polyatomic ion?

Which bonds in caffeine are polar covalent bonds?

An important part of writing a formula unit for an ionic compound is to make sure that

Which of the following molecules contains polar bonds but is nonpolar overall?

Nonmetals typically and metals typically .

Antiestrogens are one type of molecule that can be used to treat breast cancer. Which of the following characteristics should be included in the design of a novel antiestrogen?

Does chloroform (CHCl₃) contain polar bonds?

What are the charges on the ions that make up this lattice of lithium (the larger spheres) and oxygen (the smaller spheres) in Li₂O?

How many nonbonding electrons are in the chloroethylene molecule (C₂H₃Cl)?

Which of the following statements best describes the behavior of period 2 elements in a covalent molecule?

Formaldehyde is used as a preservative and in disinfection. It has the structure shown below. What is the strongest type of intermolecular interaction attracting molecules of formaldehyde together?

Ethylene is used as a starting material in making plastics. It has a molecular formula of C₂H₄. Which of the following structures is the correct Lewis dot structure for ethylene?

What ionic compound has the formula Na₂O?

What is the electron geometry of the oxygen in methanol, shown below?

Magnesium chloride is sometimes administered orally to suppress premature labor. Which of the following is a valid ionic formula for magnesium chloride?

Which elements have the highest electronegativity and why?

Why are there many different ways to model and draw molecules?

What is the charge on each chlorine in an ionic compound composed of calcium and chlorine?

In this diagram showing the boiling of liquid water, Arrow A points to

Which of the following elements is the most electronegative?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Exam 3: Compounds and Molecules

Which of the following ions is a polyatomic ion?

Which bonds in caffeine are polar covalent bonds?

An important part of writing a formula unit for an ionic compound is to make sure that

Which of the following molecules contains polar bonds but is nonpolar overall?

Nonmetals typically ______ and metals typically ______.

Antiestrogens are one type of molecule that can be used to treat breast cancer. Which of the following characteristics should be included in the design of a novel antiestrogen?

Does chloroform (CHCl3) contain polar bonds?

What are the charges on the ions that make up this lattice of lithium (the larger spheres) and oxygen (the smaller spheres) in Li2O?

How many nonbonding electrons are in the chloroethylene molecule (C2H3Cl)?

Which of the following statements best describes the behavior of period 2 elements in a covalent molecule?

Formaldehyde is used as a preservative and in disinfection. It has the structure shown below. What is the strongest type of intermolecular interaction attracting molecules of formaldehyde together?

Ethylene is used as a starting material in making plastics. It has a molecular formula of C2H4. Which of the following structures is the correct Lewis dot structure for ethylene?

What ionic compound has the formula Na2O?

What is the electron geometry of the oxygen in methanol, shown below?

Magnesium chloride is sometimes administered orally to suppress premature labor. Which of the following is a valid ionic formula for magnesium chloride?

Which elements have the highest electronegativity and why?

Why are there many different ways to model and draw molecules?

What is the charge on each chlorine in an ionic compound composed of calcium and chlorine?

In this diagram showing the boiling of liquid water, Arrow A points to

Which of the following elements is the most electronegative?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Nonmetals typically and metals typically .

Does chloroform (CHCl₃) contain polar bonds?

What are the charges on the ions that make up this lattice of lithium (the larger spheres) and oxygen (the smaller spheres) in Li₂O?

How many nonbonding electrons are in the chloroethylene molecule (C₂H₃Cl)?

Ethylene is used as a starting material in making plastics. It has a molecular formula of C₂H₄. Which of the following structures is the correct Lewis dot structure for ethylene?

What ionic compound has the formula Na₂O?