Question 1

What is the molecular shape of the carbon indicated with arrow I in this structure of caffeine?

Accepted Answer

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

Question 2

The only interactions between two or more molecules of a nonpolar material such as methane (CH4) are _______ because these molecules do not have permanent dipoles.

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 3

In this covalent molecule of methane,

Accepted Answer

A)  carbon is sharing its four electrons with the hydrogens. 
B)  carbon has donated four electrons to hydrogen, leaving it with a charge of +4. 
C)  hydrogen has eight electrons in its valence shell. 
D)  carbon is very unstable. 
E)  carbon does not have an octet of electrons. 
A)  carbon is sharing its four electrons with the hydrogens. 
B)  carbon has donated four electrons to hydrogen, leaving it with a charge of +4. 
C)  hydrogen has eight electrons in its valence shell. 
D)  carbon is very unstable. 
E)  carbon does not have an octet of electrons.

Question 4

The following ionic formula is not valid. Which of the following statements best describes what's wrong with this formula? AlCl2

Accepted Answer

A)  It does not include both a nonmetal and a metal. 
B)  The ratio of cations to anions is not 1:1. 
C)  The anion is written first, followed by the cation. 
D)  This compound does not exist in nature. 
E)  The charges do not add up to zero. 
A)  It does not include both a nonmetal and a metal. 
B)  The ratio of cations to anions is not 1:1. 
C)  The anion is written first, followed by the cation. 
D)  This compound does not exist in nature. 
E)  The charges do not add up to zero.

Question 5

Iron(II) is an example of a(n) ________.

Accepted Answer

A)  cation 
B)  anion 
C)  ionic bond 
D)  covalent bond 
E)  salt 
A)  cation 
B)  anion 
C)  ionic bond 
D)  covalent bond 
E)  salt

Question 6

What is the name of Na2SO3, a preservative in many foods and drinks?

Accepted Answer

A)  sodium sulfite 
B)  sodium sulfate 
C)  disodium sulfur trioxide 
D)  sodium sulfur trioxide 
E)  disodium trisulfite 
A)  sodium sulfite 
B)  sodium sulfate 
C)  disodium sulfur trioxide 
D)  sodium sulfur trioxide 
E)  disodium trisulfite

Question 7

Which of the following is not a valid ionic formula?

Accepted Answer

A)  NaF 
B)  MgO 
C)  KCl2 
D)  CaF2 
E)  Na2O 
A)  NaF 
B)  MgO 
C)  KCl2 
D)  CaF2 
E)  Na2O

Question 8

An atom, X, has a tetrahedral electron geometry but a trigonal pyramidal molecular shape. How many atoms is atom X bonded to?

Accepted Answer

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

Question 9

Which of the following molecules exhibits the strongest intermolecular forces of attraction?

Accepted Answer

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

Question 10

Which of the following elements is the most electronegative?

Accepted Answer

A)  nitrogen 
B)  carbon 
C)  oxygen 
D)  sulfur 
E)  selenium 
A)  nitrogen 
B)  carbon 
C)  oxygen 
D)  sulfur 
E)  selenium

Question 11

Which Lewis dot structure is the same molecule as 2-methylbutane, shown below in its ball-and-stick model?

Accepted Answer

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

Question 12

Below are two ions (not drawn to scale). What will they do when in close proximity to one another?

Accepted Answer

A)  They will attract one another, forming an ionic compound. 
B)  They will attract one another, forming a covalent bond. 
C)  The sodium ion will transfer a proton to chloride. 
D)  The chloride ion will transfer an electron to sodium. 
E)  They will do nothing. 
A)  They will attract one another, forming an ionic compound. 
B)  They will attract one another, forming a covalent bond. 
C)  The sodium ion will transfer a proton to chloride. 
D)  The chloride ion will transfer an electron to sodium. 
E)  They will do nothing.

Question 13

Which of the following statements best describes the meaning of an expanded octet?

Accepted Answer

A)  "Expanded octets" are molecules in which an element expands its valence shell to gain an octet of electrons. 
B)  "Expanded octets" is a term that describes atoms that have more than eight electrons in their valence shells. 
C)  "Expanded octets" refers to atoms that, when bonded, must be larger than normal. 
D)  "Expanded octets" is used to describe elements that do not normally form an octet when bonded and would therefore have to expand to form the octet. 
E)  "Expanded octets" is used to describe how atoms accept electrons to attain a full valence shell. 
A)  "Expanded octets" are molecules in which an element expands its valence shell to gain an octet of electrons. 
B)  "Expanded octets" is a term that describes atoms that have more than eight electrons in their valence shells. 
C)  "Expanded octets" refers to atoms that, when bonded, must be larger than normal. 
D)  "Expanded octets" is used to describe elements that do not normally form an octet when bonded and would therefore have to expand to form the octet. 
E)  "Expanded octets" is used to describe how atoms accept electrons to attain a full valence shell.

Question 14

An ion that has more electrons than protons is a(n) ________.

Accepted Answer

A)  cation 
B)  anion 
C)  ionic bond 
D)  covalent bond 
E)  salt 
A)  cation 
B)  anion 
C)  ionic bond 
D)  covalent bond 
E)  salt

Question 15

In which of the structures are six electrons being shared between two atoms?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 16

What is the most likely connectivity of the atoms in chloroethylene (C2H3Cl)?

Accepted Answer

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

Question 17

Which of these structures is a diatomic molecule?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 18

Which of the following bonds is nonpolar?

Accepted Answer

A)  C-O 
B)  O-F 
C)  C-F 
D)  C-H 
E)  H-F 
A)  C-O 
B)  O-F 
C)  C-F 
D)  C-H 
E)  H-F

Question 19

In addition to single bonds, which of the following electron groups are on the nitrogen of methylamine (CH5N)?

Accepted Answer

A)  a double bond 
B)  a triple bond 
C)  a single electron 
D)  a lone pair of electrons 
E)  None of the above 
A)  a double bond 
B)  a triple bond 
C)  a single electron 
D)  a lone pair of electrons 
E)  None of the above

Question 20

Another name for an ionic compound is a(n) ________.

Accepted Answer

A)  cation 
B)  anion 
C)  ionic bond 
D)  covalent bond 
E)  salt 
A)  cation 
B)  anion 
C)  ionic bond 
D)  covalent bond 
E)  salt

What is the molecular shape of the carbon indicated with arrow I in this structure of caffeine?

The only interactions between two or more molecules of a nonpolar material such as methane (CH₄) are _______ because these molecules do not have permanent dipoles.

In this covalent molecule of methane,

The following ionic formula is not valid. Which of the following statements best describes what's wrong with this formula? AlCl₂

Iron(II) is an example of a(n) ________.

What is the name of Na₂SO₃, a preservative in many foods and drinks?

Which of the following is not a valid ionic formula?

An atom, X, has a tetrahedral electron geometry but a trigonal pyramidal molecular shape. How many atoms is atom X bonded to?

Which of the following molecules exhibits the strongest intermolecular forces of attraction?

Which of the following elements is the most electronegative?

Which Lewis dot structure is the same molecule as 2-methylbutane, shown below in its ball-and-stick model?

Below are two ions (not drawn to scale). What will they do when in close proximity to one another?

Which of the following statements best describes the meaning of an expanded octet?

An ion that has more electrons than protons is a(n) ________.

In which of the structures are six electrons being shared between two atoms?

What is the most likely connectivity of the atoms in chloroethylene (C₂H₃Cl)?

Which of these structures is a diatomic molecule?

Which of the following bonds is nonpolar?

In addition to single bonds, which of the following electron groups are on the nitrogen of methylamine (CH₅N)?

Another name for an ionic compound is a(n) ________.

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

What is the molecular shape of the carbon indicated with arrow I in this structure of caffeine?

The only interactions between two or more molecules of a nonpolar material such as methane (CH4) are _______ because these molecules do not have permanent dipoles.

In this covalent molecule of methane,

The following ionic formula is not valid. Which of the following statements best describes what's wrong with this formula? AlCl2

Iron(II) is an example of a(n) ________.

What is the name of Na2SO3, a preservative in many foods and drinks?

Which of the following is not a valid ionic formula?

An atom, X, has a tetrahedral electron geometry but a trigonal pyramidal molecular shape. How many atoms is atom X bonded to?

Which of the following molecules exhibits the strongest intermolecular forces of attraction?

Which of the following elements is the most electronegative?

Which Lewis dot structure is the same molecule as 2-methylbutane, shown below in its ball-and-stick model?

Below are two ions (not drawn to scale). What will they do when in close proximity to one another?

Which of the following statements best describes the meaning of an expanded octet?

An ion that has more electrons than protons is a(n) ________.

In which of the structures are six electrons being shared between two atoms?

What is the most likely connectivity of the atoms in chloroethylene (C2H3Cl)?

Which of these structures is a diatomic molecule?

Which of the following bonds is nonpolar?

In addition to single bonds, which of the following electron groups are on the nitrogen of methylamine (CH5N)?

Another name for an ionic compound is a(n) ________.

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

The only interactions between two or more molecules of a nonpolar material such as methane (CH₄) are _______ because these molecules do not have permanent dipoles.

The following ionic formula is not valid. Which of the following statements best describes what's wrong with this formula? AlCl₂

What is the name of Na₂SO₃, a preservative in many foods and drinks?

What is the most likely connectivity of the atoms in chloroethylene (C₂H₃Cl)?

In addition to single bonds, which of the following electron groups are on the nitrogen of methylamine (CH₅N)?