Question 1

The NO molecule can never satisfy the octet rule.

Accepted Answer

A) True 
 B)False

Question 2

What kind of bond results when electron transfer occurs between atoms of two different elements?

Accepted Answer

A) ionic 
B) covalent 
C) nonpolar 
D) single 
E) double 
A) ionic 
B) covalent 
C) nonpolar 
D) single 
E) double

Question 3

In what region on the periodic table are elements with the lowest electronegativity values found?

Accepted Answer

A) upper right corner 
B) bottom right corner 
C) upper left corner 
D) bottom left corner 
E) middle 
A) upper right corner 
B) bottom right corner 
C) upper left corner 
D) bottom left corner 
E) middle

Question 4

What is the name of the compound whose formula is CCl4?

Accepted Answer

A) carbon tetrachloride 
B) carbon(IV) chloride 
C) carbon chloride 
D) carbotetrachloride 
E) carbonate tetrachloride 
A) carbon tetrachloride 
B) carbon(IV) chloride 
C) carbon chloride 
D) carbotetrachloride 
E) carbonate tetrachloride

Question 5

Which of the following bonds would be the most polar?

Accepted Answer

A) P-F 
B) N-F 
C) S-Cl 
D) Br-Br 
E) F-F 
A) P-F 
B) N-F 
C) S-Cl 
D) Br-Br 
E) F-F

Question 6

A covalent bond is formed when

Accepted Answer

A) two metals share a pair of electrons. 
B) a metal and a nonmetal share a pair of electrons. 
C) a nonmetal donates an electron to a metal. 
D) cations and anions join as an ion pair. 
E) two nonmetals share a pair of electrons. 
A) two metals share a pair of electrons. 
B) a metal and a nonmetal share a pair of electrons. 
C) a nonmetal donates an electron to a metal. 
D) cations and anions join as an ion pair. 
E) two nonmetals share a pair of electrons.

Question 7

Which Lewis symbol for an ion is incorrect?

Accepted Answer

A) [Na]+ 
B) [Ca]2+ 
C) [Sn]4+ 
D)    
E)    
A) [Na]+ 
B) [Ca]2+ 
C) [Sn]4+ 
D)    
E)

Question 8

There are three atoms of iodine represented in the formula NaIO3.

Accepted Answer

A) True 
 B)False

Question 9

What is the Lewis structure of methanethiol, CH3SH?

Accepted Answer

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

Question 10

Which statement about general bonding characteristics is FALSE?

Accepted Answer

A) Bond energy is the amount of energy required to break a bond holding two atoms together. 
B) Bond length is the distance of separation of two nuclei in a covalent bond. 
C) Triple bonds have higher bond energies than double bonds. 
D) Single bonds are easier to break than double bonds. 
E) A triple bond is longer than a single bond. 
A) Bond energy is the amount of energy required to break a bond holding two atoms together. 
B) Bond length is the distance of separation of two nuclei in a covalent bond. 
C) Triple bonds have higher bond energies than double bonds. 
D) Single bonds are easier to break than double bonds. 
E) A triple bond is longer than a single bond.

Question 11

Assuming reactions between the following pairs of elements, which pair is most likely to form an ionic compound?

Accepted Answer

A) copper and tin 
B) chlorine and oxygen 
C) cesium and iodine 
D) carbon and chlorine 
E) fluorine and iodine 
A) copper and tin 
B) chlorine and oxygen 
C) cesium and iodine 
D) carbon and chlorine 
E) fluorine and iodine

Question 12

In Lewis symbols, the chemical symbol of an element represents both the nucleus and the lower energy (nonvalence) electrons.

Accepted Answer

A) True 
 B)False

Question 13

Which element has the greatest electronegativity?

Accepted Answer

A) H 
B) Cl 
C) O 
D) F 
E) Na 
A) H 
B) Cl 
C) O 
D) F 
E) Na

Question 14

As a rule, ionic compounds tend to have lower melting and boiling points than covalent compounds consisting of small molecules.

Accepted Answer

A) True 
 B)False

Question 15

What is the formula of iron(III) bromide?

Accepted Answer

A) Fe(Br2)3 
B) Fe3Br 
C) Fe3Br3 
D) FeBr3 
E) Fe2Br3 
A) Fe(Br2)3 
B) Fe3Br 
C) Fe3Br3 
D) FeBr3 
E) Fe2Br3

Question 16

In the molecule BeF2, the beryllium atom is an exception to the octet rule.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following would NOT describe the Lewis structure of PF3?

Accepted Answer

A) The Lewis structure has a double bond between phosphorus and one of the fluorine atoms. 
B) No resonance structures can be drawn. 
C) The molecule has a lone pair (nonbonding pair) on the central atom. 
D) The Lewis structure has 26 valence electrons. 
E) The Lewis structure is not an exception to the octet rule. 
A) The Lewis structure has a double bond between phosphorus and one of the fluorine atoms. 
B) No resonance structures can be drawn. 
C) The molecule has a lone pair (nonbonding pair) on the central atom. 
D) The Lewis structure has 26 valence electrons. 
E) The Lewis structure is not an exception to the octet rule.

Question 18

Which properly represents the Lewis structure of hydrogen sulfide, H2S?

Accepted Answer

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

Question 19

Predict the formula of the compound formed when ions of sodium and sulfur combine.

Accepted Answer

A) Na2S 
B) NaS2 
C) NaS 
D) Na2S2 
E) Na3S 
A) Na2S 
B) NaS2 
C) NaS 
D) Na2S2 
E) Na3S

Question 20

Which formula represents ammonia?

Accepted Answer

A) Al3 
B) AlH3 
C) NH4+ 
D) NH3 
E) AN4 
A) Al3 
B) AlH3 
C) NH4+ 
D) NH3 
E) AN4

Exam 3: Structure and Properties of Ionic and Covalent Compounds

The NO molecule can never satisfy the octet rule.

What kind of bond results when electron transfer occurs between atoms of two different elements?

In what region on the periodic table are elements with the lowest electronegativity values found?

What is the name of the compound whose formula is CCl4?

Which of the following bonds would be the most polar?

A covalent bond is formed when

Which Lewis symbol for an ion is incorrect?

There are three atoms of iodine represented in the formula NaIO3.

What is the Lewis structure of methanethiol, CH3SH?

Which statement about general bonding characteristics is FALSE?

Assuming reactions between the following pairs of elements, which pair is most likely to form an ionic compound?

In Lewis symbols, the chemical symbol of an element represents both the nucleus and the lower energy (nonvalence) electrons.

Which element has the greatest electronegativity?

As a rule, ionic compounds tend to have lower melting and boiling points than covalent compounds consisting of small molecules.

What is the formula of iron(III) bromide?

In the molecule BeF2, the beryllium atom is an exception to the octet rule.

Which of the following would NOT describe the Lewis structure of PF3?

Which properly represents the Lewis structure of hydrogen sulfide, H2S?

Predict the formula of the compound formed when ions of sodium and sulfur combine.

Which formula represents ammonia?

Chemistry:methods and Measurement

The Structure of the Atom and the Periodic Table

Calculations, Chemical Changes, and the Chemical Equation

States of Matter- Gases, Liquids, and Solids

Solutions

Energy, Rate and Equilibrium

Acids and Bases

The Nucleus, Radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry- the Saturated Hydrocarbons

The Unsaturated Hydrocarbons- Alkenes, Alkynes, and Aromatics

Alcohols, Phenols, Thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

Filters

What is the name of the compound whose formula is CCl₄?

There are three atoms of iodine represented in the formula NaIO₃.

What is the Lewis structure of methanethiol, CH₃SH?

In the molecule BeF₂, the beryllium atom is an exception to the octet rule.

Which of the following would NOT describe the Lewis structure of PF₃?

Which properly represents the Lewis structure of hydrogen sulfide, H₂S?