Question 1

A chemical bond formed when two atoms share two pairs of electrons is a ________ bond; it is best described as ________.

Accepted Answer

A) double; covalent 
B) double; ionic 
C) single; covalent 
D) single; ionic 
E) triple; covalent 
A) double; covalent 
B) double; ionic 
C) single; covalent 
D) single; ionic 
E) triple; covalent

Question 2

For the dot structure shown the most likely elements are X =________ and Y = ________.

Accepted Answer

A) carbon; hydrogen 
B) carbon; fluorine 
C) carbon; oxygen 
D) hydrogen; carbon 
E) fluorine; carbon 
A) carbon; hydrogen 
B) carbon; fluorine 
C) carbon; oxygen 
D) hydrogen; carbon 
E) fluorine; carbon

Question 3

Match the following.
-sulfur dioxide

Accepted Answer

A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3 
A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3

Question 4

What is the systematic name of ICl3?

Accepted Answer

A) iodine chloride 
B) iodine(III)chloride 
C) triiodine chloride 
D) iodine trichloride 
E) tri(iodine chloride) 
A) iodine chloride 
B) iodine(III)chloride 
C) triiodine chloride 
D) iodine trichloride 
E) tri(iodine chloride)

Question 5

Which group contains only elements which normally exist as diatomic molecules?

Accepted Answer

A) nitrogen; sulfur,bromine 
B) helium; neon,argon 
C) nitrogen; oxygen,fluorine 
D) hydrogen; lithium,sodium 
E) oxygen; phosphorus,germanium 
A) nitrogen; sulfur,bromine 
B) helium; neon,argon 
C) nitrogen; oxygen,fluorine 
D) hydrogen; lithium,sodium 
E) oxygen; phosphorus,germanium

Question 6

The VSEPR model or molecular structure requires a knowledge of ________ to predict the geometry of an atom in a molecule.

Accepted Answer

A) the number of atoms bonded to the atom of interest 
B) the total number of atoms in the molecule 
C) the number of electron pairs on the atom of interest 
D) both A and C 
E) none of the above 
A) the number of atoms bonded to the atom of interest 
B) the total number of atoms in the molecule 
C) the number of electron pairs on the atom of interest 
D) both A and C 
E) none of the above

Question 7

Match the following.
-bromine pentafluoride

Accepted Answer

A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3 
A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3

Question 8

The formula for phosphorus pentafluoride is ________.

Accepted Answer

A) PhF5 
B) PF5 
C) P5F 
D) (PF)5 
E) P5F5 
A) PhF5 
B) PF5 
C) P5F 
D) (PF)5 
E) P5F5

Question 9

A section of the Periodic Table containing main group elements is shown.If the elements W,X,Y,and Z have electronegativity values of 1.0,2.0,2.5,and 3.5,respectively,which bond is the least polar?

Accepted Answer

A) WX 
B) WZ 
C) XY 
D) XZ 
E) YZ 
A) WX 
B) WZ 
C) XY 
D) XZ 
E) YZ

Question 10

In forming covalent bonds where the octet rule is obeyed,sulfur usually forms ________ bonds and chlorine usually forms ________ bonds.

Accepted Answer

A) one; one 
B) two; two 
C) one; two 
D) two; one 
E) six; seven 
A) one; one 
B) two; two 
C) one; two 
D) two; one 
E) six; seven

Question 11

A bond where the electrons are shared unequally is called a(an)________ bond.

Accepted Answer

A) polar covalent 
B) coordinate covalent 
C) nonpolar covalent 
D) ionic 
E) none of the above 
A) polar covalent 
B) coordinate covalent 
C) nonpolar covalent 
D) ionic 
E) none of the above

Question 12

Match the following.
-methane

Accepted Answer

A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3 
A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3

Question 13

Match the following.
-dinitrogen tetroxide

Accepted Answer

A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3 
A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3

Question 14

Which set of properties would identify an unknown white solid as a molecular compound?
I.Contains a metal.
II.Has a definite crystal structure.
III.Dissolves in water,but not in organic liquids.
IV.Melts at 80 degrees Celsius.
V.Does not conduct electricity when melted.

Accepted Answer

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

Question 15

Which property could describe a covalent compound?

Accepted Answer

A) It conducts electricity when melted. 
B) It is a gas at room temperature. 
C) It is composed of a non-metal and a metal. 
D) It conducts electricity when dissolved in water. 
E) none of the above 
A) It conducts electricity when melted. 
B) It is a gas at room temperature. 
C) It is composed of a non-metal and a metal. 
D) It conducts electricity when dissolved in water. 
E) none of the above

Question 16

Explain why it is unlikely that an organic molecule would have an odd number of valence electrons.

Accepted Answer

In most molecules,the Lewis dot structur

Question 17

According to VSEPR theory,a molecule with three charge clouds including one lone pair would have a ________ shape.

Accepted Answer

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

Question 18

The smallest possible unit of a covalent compound is a(an)

Accepted Answer

A) atom. 
B) cation. 
C) formula unit. 
D) molecule. 
E) polyatomic ion. 
A) atom. 
B) cation. 
C) formula unit. 
D) molecule. 
E) polyatomic ion.

Question 19

A chemical bond formed when two atoms share six electrons is a ________ bond; it is best described as ________.

Accepted Answer

A) double; covalent 
B) double; ionic 
C) single; covalent 
D) single; ionic 
E) triple; covalent 
A) double; covalent 
B) double; ionic 
C) single; covalent 
D) single; ionic 
E) triple; covalent

Question 20

The total number of valence electrons in a molecule of SOF2 is ________.

Accepted Answer

A) 26 
B) 24 
C) 18 
D) 20 
E) 22 
A) 26 
B) 24 
C) 18 
D) 20 
E) 22

Exam 4: Molecular Compounds

A chemical bond formed when two atoms share two pairs of electrons is a ________ bond; it is best described as ________.

For the dot structure shown the most likely elements are X =________ and Y = ________.

Match the following. -sulfur dioxide

What is the systematic name of ICl3?

Which group contains only elements which normally exist as diatomic molecules?

The VSEPR model or molecular structure requires a knowledge of ________ to predict the geometry of an atom in a molecule.

Match the following. -bromine pentafluoride

The formula for phosphorus pentafluoride is ________.

A section of the Periodic Table containing main group elements is shown.If the elements W,X,Y,and Z have electronegativity values of 1.0,2.0,2.5,and 3.5,respectively,which bond is the least polar?

In forming covalent bonds where the octet rule is obeyed,sulfur usually forms ________ bonds and chlorine usually forms ________ bonds.

A bond where the electrons are shared unequally is called a(an)________ bond.

Match the following. -methane

Match the following. -dinitrogen tetroxide

Which set of properties would identify an unknown white solid as a molecular compound? I.Contains a metal. II.Has a definite crystal structure. III.Dissolves in water,but not in organic liquids. IV.Melts at 80 degrees Celsius. V.Does not conduct electricity when melted.

Which property could describe a covalent compound?

Explain why it is unlikely that an organic molecule would have an odd number of valence electrons.

According to VSEPR theory,a molecule with three charge clouds including one lone pair would have a ________ shape.

The smallest possible unit of a covalent compound is a(an)

A chemical bond formed when two atoms share six electrons is a ________ bond; it is best described as ________.

The total number of valence electrons in a molecule of SOF2 is ________.

Matter and Measurements

Atoms and the Periodic Table

Ionic Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

A chemical bond formed when two atoms share two pairs of electrons is a bond; it is best described as .

For the dot structure shown the most likely elements are X = and Y = .

What is the systematic name of ICl₃?

In forming covalent bonds where the octet rule is obeyed,sulfur usually forms bonds and chlorine usually forms bonds.

A chemical bond formed when two atoms share six electrons is a bond; it is best described as .

The total number of valence electrons in a molecule of SOF₂ is ________.