Question 1

List the following bonds in order of increasing polarity.

Accepted Answer

A) N-O < N-N < N-F < H-F 
B) N-N < N-O < N-F < H-F 
C) H-F < N-F < N-O < N-N 
D) N-N < N-O < H-F < N-F 
A) N-O < N-N < N-F < H-F 
B) N-N < N-O < N-F < H-F 
C) H-F < N-F < N-O < N-N 
D) N-N < N-O < H-F < N-F

Question 2

Which of the following statements best describes a relatively polar bond?

Accepted Answer

A) a very electronegative atom and a weakly electronegative atom are covalently bound 
B) two very electronegative atoms are covalently bound 
C) two very electronegative atoms undergo ionic bonding 
D) two weakly electronegative atoms undergo ionic bonding 
E) none of the above 
A) a very electronegative atom and a weakly electronegative atom are covalently bound 
B) two very electronegative atoms are covalently bound 
C) two very electronegative atoms undergo ionic bonding 
D) two weakly electronegative atoms undergo ionic bonding 
E) none of the above

Question 3

How many oxide ions (O-2)are needed to balance the positive charge of a titanium ion (Ti+4)?

Accepted Answer

A) 2 
B) 1 
C) 3 
D) 4 
E) 6 
A) 2 
B) 1 
C) 3 
D) 4 
E) 6

Question 4

Which would you expect to have a higher melting point: sodium chloride,NaCl,or cesium chloride,CsCl? Why?

Accepted Answer

A) The cesium chloride has a higher melting point because larger ions of the same charge are able to attract more ions of the opposite charge. 
B) The cesium chloride has a higher melting point because its ions are smaller,which makes the charges more dense. 
C) The sodium chloride has a higher melting point because of the greater charges of the ions,and hence the greater force of attractions between them. 
D) The sodium chloride has a higher melting point because its ions are smaller,which allows oppositely charged ions to get closer. 
A) The cesium chloride has a higher melting point because larger ions of the same charge are able to attract more ions of the opposite charge. 
B) The cesium chloride has a higher melting point because its ions are smaller,which makes the charges more dense. 
C) The sodium chloride has a higher melting point because of the greater charges of the ions,and hence the greater force of attractions between them. 
D) The sodium chloride has a higher melting point because its ions are smaller,which allows oppositely charged ions to get closer.

Question 5

Which of the following molecules is most likely to show a dipole-dipole interaction?

Accepted Answer

A) H2S 
B) CO2 
C) CH4 
D) H-C   C-H 
E) none of the above 
A) H2S 
B) CO2 
C) CH4 
D) H-C   C-H 
E) none of the above

Question 6

Which molecule is most polar?

Accepted Answer

A) S=C=S 
B) O=C=O 
C) O=C=S 
D) These all have the same polarity. 
A) S=C=S 
B) O=C=O 
C) O=C=S 
D) These all have the same polarity.

Question 7

The neon atom tends not to gain any additional electrons because

Accepted Answer

A) its nuclear charge is not great enough. 
B) that would result in a positive ion. 
C) of the repulsions they would experience with electrons in the same shell. 
D) there is no more room available in its outermost occupied shell. 
A) its nuclear charge is not great enough. 
B) that would result in a positive ion. 
C) of the repulsions they would experience with electrons in the same shell. 
D) there is no more room available in its outermost occupied shell.

Question 8

The boiling point of 1,4-butanediol is 230°C.Would you expect this compound to be soluble or insoluble in room-temperature water?

Accepted Answer

A) Since there are no polar areas on this molecule,it is insoluble in water at room temperature. 
B) A high boiling point means that the substance interacts with itself quite strongly.Therefore this molecule is not soluble in water. 
C) Since there are polar areas on this molecule,it is insoluble in water at room temperature. 
D) Water would be attracted to both ends of 1,4 butanediol,and it is infinitely soluble in water. 
A) Since there are no polar areas on this molecule,it is insoluble in water at room temperature. 
B) A high boiling point means that the substance interacts with itself quite strongly.Therefore this molecule is not soluble in water. 
C) Since there are polar areas on this molecule,it is insoluble in water at room temperature. 
D) Water would be attracted to both ends of 1,4 butanediol,and it is infinitely soluble in water.

Question 9

If the following generic atom were to undergo ionization,what would the most likely product be?

Accepted Answer

A) +1 
B) -2 
C) -3 
D) +4 
E) would probably not ionize 
A) +1 
B) -2 
C) -3 
D) +4 
E) would probably not ionize

Question 10

Which of the following would be a negative ion with a single charge?

Accepted Answer

A) an atom with 11 protons and 12 electrons 
B) an atom with 11 protons and 11 electrons 
C) an atom with 12 protons and 11 electrons 
D) an atom with 10 protons and 12 electrons 
E) none of the above 
A) an atom with 11 protons and 12 electrons 
B) an atom with 11 protons and 11 electrons 
C) an atom with 12 protons and 11 electrons 
D) an atom with 10 protons and 12 electrons 
E) none of the above

Question 11

Which of the following elements has two valence electrons?

Accepted Answer

A) Na 
B) Mg 
C) H 
D) Ne 
E) Li 
A) Na 
B) Mg 
C) H 
D) Ne 
E) Li

Question 12

There is more gold in 1 km3 of the ocean than the amount of gold mined in all of recorded history.How come we do not mine the oceans?

Accepted Answer

A) It is too dilute to separate. 
B) It would take too much energy. 
C) It would cost too much. 
D) all of the above 
E) none of the above 
A) It is too dilute to separate. 
B) It would take too much energy. 
C) It would cost too much. 
D) all of the above 
E) none of the above

Question 13

Atoms of nonmetallic elements form covalent bonds,but they can also form ionic bonds.How is this possible?

Accepted Answer

A) This happens when one of the bonded nonmetallic elements has a strong electronegativity. 
B) It happens when one of the nonmetallic elements loses an electron to become a positive ion. 
C) An ionic bond results when a nonmetallic elements loses an electron to a metallic element. 
D) An ionic bond results when a nonmetallic elements gains an electron from a metallic element. 
A) This happens when one of the bonded nonmetallic elements has a strong electronegativity. 
B) It happens when one of the nonmetallic elements loses an electron to become a positive ion. 
C) An ionic bond results when a nonmetallic elements loses an electron to a metallic element. 
D) An ionic bond results when a nonmetallic elements gains an electron from a metallic element.

Question 14

Which of the following molecules is most likely to show the strongest hydrogen bonding?

Accepted Answer

A) CH3OH 
B) CH3SH 
C) CH4 
D) H-C   C-H 
E) A,B and C 
A) CH3OH 
B) CH3SH 
C) CH4 
D) H-C   C-H 
E) A,B and C

Question 15

Which of the following elements will most likely form an ion with a +1 charge?

Accepted Answer

A) Na 
B) Mg 
C) Al 
D) Si 
E) Cl 
A) Na 
B) Mg 
C) Al 
D) Si 
E) Cl

Question 16

Which bond is most polar?

Accepted Answer

A) H-N 
B) N-C 
C) C-C 
D) O-H 
A) H-N 
B) N-C 
C) C-C 
D) O-H

Question 17

Is an ionic compound an example of a chemical compound,or is a chemical compound an example of an ionic compound?

Accepted Answer

A) An chemical compound is an example of a ionic compound. 
B) Neither is an example of the other. 
C) Each is an example of the other. 
D) An ionic compound is an example of a chemical compound. 
A) An chemical compound is an example of a ionic compound. 
B) Neither is an example of the other. 
C) Each is an example of the other. 
D) An ionic compound is an example of a chemical compound.

Question 18

How many covalent bonds would the following atom usually form?

Accepted Answer

A) 3 
B) 2 
C) 1 
D) 5 
E) would usually not form any covalent bonds 
A) 3 
B) 2 
C) 1 
D) 5 
E) would usually not form any covalent bonds

Question 19

Ammonia,NH3,is more polar than is borane,B H3 because it

Accepted Answer

A) has a lone pair of electrons. 
B) is less symmetrical than borane. 
C) its hydrogens are not exactly opposite one another. 
D) all of the above 
A) has a lone pair of electrons. 
B) is less symmetrical than borane. 
C) its hydrogens are not exactly opposite one another. 
D) all of the above

Question 20

Which would you expect to have a higher melting point: sodium chloride,NaCl,or aluminum oxide, AL2O3?

Accepted Answer

A) The aluminum oxide has a higher melting point because it is a larger molecule and has a greater number of molecular interactions. 
B) NaCl has a higher melting point because it is a solid at room temperature. 
C) The aluminum oxide has a higher melting point because of the greater charges of the ions,and hence the greater force of attractions between them. 
D) The aluminum oxide has a higher melting point because of the covalent bonds within the molecule. 
A) The aluminum oxide has a higher melting point because it is a larger molecule and has a greater number of molecular interactions. 
B) NaCl has a higher melting point because it is a solid at room temperature. 
C) The aluminum oxide has a higher melting point because of the greater charges of the ions,and hence the greater force of attractions between them. 
D) The aluminum oxide has a higher melting point because of the covalent bonds within the molecule.

Exam 15: How Atoms Bond and Molecules Attract

List the following bonds in order of increasing polarity.

Which of the following statements best describes a relatively polar bond?

How many oxide ions (O-2)are needed to balance the positive charge of a titanium ion (Ti+4)?

Which would you expect to have a higher melting point: sodium chloride,NaCl,or cesium chloride,CsCl? Why?

Which of the following molecules is most likely to show a dipole-dipole interaction?

Which molecule is most polar?

The neon atom tends not to gain any additional electrons because

The boiling point of 1,4-butanediol is 230°C.Would you expect this compound to be soluble or insoluble in room-temperature water?

If the following generic atom were to undergo ionization,what would the most likely product be?

Which of the following would be a negative ion with a single charge?

Which of the following elements has two valence electrons?

There is more gold in 1 km3 of the ocean than the amount of gold mined in all of recorded history.How come we do not mine the oceans?

Atoms of nonmetallic elements form covalent bonds,but they can also form ionic bonds.How is this possible?

Which of the following molecules is most likely to show the strongest hydrogen bonding?

Which of the following elements will most likely form an ion with a +1 charge?

Which bond is most polar?

Is an ionic compound an example of a chemical compound,or is a chemical compound an example of an ionic compound?

How many covalent bonds would the following atom usually form?

Ammonia,NH3,is more polar than is borane,B H3 because it

Which would you expect to have a higher melting point: sodium chloride,NaCl,or aluminum oxide, AL2O3?

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Time - Reading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

The Structure of Space and Time

Prologue: The Nature of Science

Filters

How many oxide ions (O^-2)are needed to balance the positive charge of a titanium ion (Ti⁺⁴)?

There is more gold in 1 km³ of the ocean than the amount of gold mined in all of recorded history.How come we do not mine the oceans?

Ammonia,NH₃,is more polar than is borane,B H₃ because it

Which would you expect to have a higher melting point: sodium chloride,NaCl,or aluminum oxide, AL₂O₃?