Question 1

Which element is most likely to form three covalent bonds?

Accepted Answer

A) C 
B) Si 
C) P 
D) S 
E) Se 
A) C 
B) Si 
C) P 
D) S 
E) Se

Question 2

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 3

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 ionic?

Accepted Answer

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

Question 4

Draw the Lewis structure for the a molecule of ethylamine,CH3CH2NH2.

Accepted Answer

Question 5

The molecule SiCl4 has a ________ shape.

Accepted Answer

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

Question 6

Consider a bent molecule,such as H2Se,in which the central atom has two lone pairs of electrons.The electronegativities of H and Se are 2.1 and 2.4,respectively.Based on these values and on consideration of molecular geometry,the H-Se bond can be considered almost ________ and the molecule is ________.

Accepted Answer

A) polar;polar 
B) nonpolar;nonpolar 
C) polar;nonpolar 
D) nonpolar;polar 
E) none of the above 
A) polar;polar 
B) nonpolar;nonpolar 
C) polar;nonpolar 
D) nonpolar;polar 
E) none of the above

Question 7

Match the following.
-carbon tetrachloride

Accepted Answer

A) ICl 
B) C   
C) N   
D) PC   
E)     
F)CO
G)S  
H)S  
I)O  
J)Br  
K)CC  
L)I   
A) ICl 
B) C   
C) N   
D) PC   
E)     
F)CO
G)S  
H)S  
I)O  
J)Br  
K)CC  
L)I

Question 8

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 9

When a non-metal atom bonds with another non-metal atom,an ionic bond is formed.

Accepted Answer

A) True 
 B)False

Question 10

The compound BrF3 would be called

Accepted Answer

A) boron trifluoride. 
B) triboron fluoride. 
C) tri (bromine fluoride). 
D) tribromine fluoride. 
E) bromine trifluoride. 
A) boron trifluoride. 
B) triboron fluoride. 
C) tri (bromine fluoride). 
D) tribromine fluoride. 
E) bromine trifluoride.

Question 11

Match the following.
-dinitrogen tetroxide

Accepted Answer

A) ICl 
B) C   
C) N   
D) PC   
E)     
F)CO
G)S  
H)S  
I)O  
J)Br  
K)CC  
L)I   
A) ICl 
B) C   
C) N   
D) PC   
E)     
F)CO
G)S  
H)S  
I)O  
J)Br  
K)CC  
L)I

Question 12

Which property is most closely associated with covalent molecules?

Accepted Answer

A) It is a gas at room temperature. 
B) It conducts electricity when dissolved in water. 
C) It has a very high melting point. 
D) It is composed of a metal and a nonmetal. 
E) none of these. 
A) It is a gas at room temperature. 
B) It conducts electricity when dissolved in water. 
C) It has a very high melting point. 
D) It is composed of a metal and a nonmetal. 
E) none of these.

Question 13

Match the following.
-phosphorus trichloride

Accepted Answer

A) ICl 
B) C   
C) N   
D) PC   
E)     
F)CO
G)S  
H)S  
I)O  
J)Br  
K)CC  
L)I   
A) ICl 
B) C   
C) N   
D) PC   
E)     
F)CO
G)S  
H)S  
I)O  
J)Br  
K)CC  
L)I

Question 14

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 15

Which element listed is the most electronegative?

Accepted Answer

A) aluminum 
B) bromine 
C) chlorine 
D) iodine 
E) sodium 
A) aluminum 
B) bromine 
C) chlorine 
D) iodine 
E) sodium

Question 16

Match the following.
-ammonia

Accepted Answer

A) ICl 
B) C   
C) N   
D) PC   
E)     
F)CO
G)S  
H)S  
I)O  
J)Br  
K)CC  
L)I   
A) ICl 
B) C   
C) N   
D) PC   
E)     
F)CO
G)S  
H)S  
I)O  
J)Br  
K)CC  
L)I

Question 17

The element least likely to obey the octet rule in forming chemical bonds is

Accepted Answer

A) boron. 
B) carbon. 
C) nitrogen. 
D) oxygen. 
E) fluorine. 
A) boron. 
B) carbon. 
C) nitrogen. 
D) oxygen. 
E) fluorine.

Question 18

Match the following.
-iodine heptafluoride

Accepted Answer

A) ICl 
B) C   
C) N   
D) PC   
E)     
F)CO
G)S  
H)S  
I)O  
J)Br  
K)CC  
L)I   
A) ICl 
B) C   
C) N   
D) PC   
E)     
F)CO
G)S  
H)S  
I)O  
J)Br  
K)CC  
L)I

Exam 4: Molecular Compounds

Which element is most likely to form three covalent bonds?

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.

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 ionic?

Draw the Lewis structure for the a molecule of ethylamine,CH3CH2NH2.

The molecule SiCl4 has a ________ shape.

Match the following. -carbon tetrachloride

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

When a non-metal atom bonds with another non-metal atom,an ionic bond is formed.

The compound BrF3 would be called

Match the following. -dinitrogen tetroxide

Which property is most closely associated with covalent molecules?

Match the following. -phosphorus trichloride

What is the systematic name of ICl3?

Which element listed is the most electronegative?

Match the following. -ammonia

The element least likely to obey the octet rule in forming chemical bonds is

Match the following. -iodine heptafluoride

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

Aldehydes and Ketones

Amines

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

Carbohydrates

The Generation of Biochemical Energy

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Protein and Amino Acid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

Draw the Lewis structure for the a molecule of ethylamine,CH₃CH₂NH_2.

The molecule SiCl₄ has a ________ shape.

The compound BrF₃ would be called

What is the systematic name of ICl₃?