Question 1

How many chloride ions (Cl-1)are needed to balance the positive charge of a barium ion (Ba+2)?

Accepted Answer

A) 2 
B) 1 
C) -2 
D) -1 
E) 3 
A) 2 
B) 1 
C) -2 
D) -1 
E) 3

Question 2

Many of the macroscopic properties of a compound depend on

Accepted Answer

A) how the atoms of the molecules are held together. 
B) the mass of the constituent atoms. 
C) the number of nucleons present in the sample. 
D) the size of the sample. 
E) how the atoms absorb light and the shape of the orbitals. 
A) how the atoms of the molecules are held together. 
B) the mass of the constituent atoms. 
C) the number of nucleons present in the sample. 
D) the size of the sample. 
E) how the atoms absorb light and the shape of the orbitals.

Question 3

Which of the following molecules would you expect to be the most strongly attracted to a Cl- ion?

Accepted Answer

A) H-F 
B) H3C-CH3 
C) Cl-Cl 
D) F-F 
E) CCl4 
A) H-F 
B) H3C-CH3 
C) Cl-Cl 
D) F-F 
E) CCl4

Question 4

Which of the following molecules is polar?

Accepted Answer

A) a 
B) b 
C) c 
D) All are polar. 
E) Only A and C are polar. 
A) a 
B) b 
C) c 
D) All are polar. 
E) Only A and C are polar.

Question 5

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

Accepted Answer

A) +3 
B) -3 
C) -5 
D) 8 
E) would probably not ionize 
A) +3 
B) -3 
C) -5 
D) 8 
E) would probably not ionize

Question 6

Which of the following compounds contains ionic bonds?

Accepted Answer

A)  CH4 
B)  K2 O 
C)  Cl2 
D)  OF2 
E) none of the above 
A)  CH4 
B)  K2 O 
C)  Cl2 
D)  OF2 
E) none of the above

Question 7

What is one role of unpaired valance electrons?

Accepted Answer

A) They take part in the formation of different types of bonds. 
B) They keep the paired electrons separated to minimize interaction. 
C) They are the nonbonding electrons. 
D) They provide the number of Lewis dots. 
E) They tell us which Lewis dot structure is correct. 
A) They take part in the formation of different types of bonds. 
B) They keep the paired electrons separated to minimize interaction. 
C) They are the nonbonding electrons. 
D) They provide the number of Lewis dots. 
E) They tell us which Lewis dot structure is correct.

Question 8

If carbonic acid (H2CO3)were to undergo ionization,what would one of the products be?

Accepted Answer

A) H- 
B) CO2 
C) H2O 
D) CO3-1 
E) CO3-2 
A) H- 
B) CO2 
C) H2O 
D) CO3-1 
E) CO3-2

Question 9

Which of the following would have the smallest number of induced dipole-induced dipole interactions?

Accepted Answer

A) C6H14 
B) C8H18 
C) C10H22 
D) C12H26 
E) not enough information given 
A) C6H14 
B) C8H18 
C) C10H22 
D) C12H26 
E) not enough information given

Question 10

If a neutral atom loses one electron,what is the electrical charge of the atom?

Accepted Answer

A) -1 
B) +1 
C) -2 
D) +2 
E) neutral 
A) -1 
B) +1 
C) -2 
D) +2 
E) neutral

Question 11

Which of the following molecules has the highest boiling point?

Accepted Answer

A) BH3 
B) NH3 
C) CH4 
D) All of the above should have the same boiling point. 
A) BH3 
B) NH3 
C) CH4 
D) All of the above should have the same boiling point.

Question 12

If a neutral atom gains two electrons,what is the electrical charge of the atom?

Accepted Answer

A) -1 
B) +1 
C) -2 
D) +2 
E) neutral 
A) -1 
B) +1 
C) -2 
D) +2 
E) neutral

Question 13

Water, H2O,and methane,C H4 ,have about the same mass and differ by only one type of atom.Why is the boiling point of water so much higher than that of methane?

Accepted Answer

A) The water molecule is less symmetrical than is the methane molecule. 
B) The oxygen of a water molecule has two lone pairs of electrons. 
C) The electronegativity difference between oxygen and hydrogen is greater than the electronegativity difference between carbon and hydrogen. 
D) all of the above 
A) The water molecule is less symmetrical than is the methane molecule. 
B) The oxygen of a water molecule has two lone pairs of electrons. 
C) The electronegativity difference between oxygen and hydrogen is greater than the electronegativity difference between carbon and hydrogen. 
D) all of the above

Question 14

Why is it better to recycle metals than to mine more?

Accepted Answer

A) It takes far less energy to recycle. 
B) Mining is less expensive than recycling but not environmentally friendly. 
C) Ores contain toxic elements. 
D) all of the above 
E) none of the above 
A) It takes far less energy to recycle. 
B) Mining is less expensive than recycling but not environmentally friendly. 
C) Ores contain toxic elements. 
D) all of the above 
E) none of the above

Question 15

An atom loses an electron to another atom.Is this an example of a physical or chemical change?

Accepted Answer

A) physical change involving the formation of negative ions 
B) chemical change involving the formation of neutral atoms 
C) physical change involving the formation of positive ions 
D) chemical change involving the formation of ions 
A) physical change involving the formation of negative ions 
B) chemical change involving the formation of neutral atoms 
C) physical change involving the formation of positive ions 
D) chemical change involving the formation of ions

Question 16

How is the number of unpaired valence electrons in an atom related to the number of bonds that the atom can form?

Accepted Answer

A) There is no defined relationship between the number of unpaired valence electrons and number of bonds that the atom can form. 
B) The number of unpaired valence electrons in an atom is one-half the number of bonds that the atom can form. 
C) The number of unpaired valence electrons in an atom is twice the number of bonds that the atom can form. 
D) The number of unpaired valence electrons in an atom is the same as the number of bonds that the atom can form. 
A) There is no defined relationship between the number of unpaired valence electrons and number of bonds that the atom can form. 
B) The number of unpaired valence electrons in an atom is one-half the number of bonds that the atom can form. 
C) The number of unpaired valence electrons in an atom is twice the number of bonds that the atom can form. 
D) The number of unpaired valence electrons in an atom is the same as the number of bonds that the atom can form.

Question 17

What is the name for the following polyatomic ion? CH3CO2-1

Accepted Answer

A) acetate 
B) monocarboxylate 
C) carboxylic 
D) acidic 
E) acetic 
A) acetate 
B) monocarboxylate 
C) carboxylic 
D) acidic 
E) acetic

Question 18

Which of the following would be an ion with a double positive charge?

Accepted Answer

A) an Mg atom that gains two electrons 
B) an Mg atom that gains one electron 
C) an Mg atom that loses two electrons 
D) an Mg atom that loses one electron 
E) none of the above 
A) an Mg atom that gains two electrons 
B) an Mg atom that gains one electron 
C) an Mg atom that loses two electrons 
D) an Mg atom that loses one electron 
E) none of the above

Question 19

How many valence electrons does gallium (Ga,atomic no.= 31)have?

Accepted Answer

A) 1 
B) 6 
C) 3 
D) 31 
E) 70 
A) 1 
B) 6 
C) 3 
D) 31 
E) 70

Question 20

Why are ion-dipole attractions stronger than dipole-dipole attractions?

Accepted Answer

A) The chemical bond in an ion-dipole molecule is similar also a covalent bond. 
B) The magnitude of the electric charge associated with an ion is much greater. 
C) Dipole areas are subject to changing from positive to negative regions on the molecule. 
D) Like charge (dipole)does not attract like charge (another dipole). 
A) The chemical bond in an ion-dipole molecule is similar also a covalent bond. 
B) The magnitude of the electric charge associated with an ion is much greater. 
C) Dipole areas are subject to changing from positive to negative regions on the molecule. 
D) Like charge (dipole)does not attract like charge (another dipole).

Exam 15: How Atoms Bond and Molecules Attract

How many chloride ions (Cl-1)are needed to balance the positive charge of a barium ion (Ba+2)?

Many of the macroscopic properties of a compound depend on

Which of the following molecules would you expect to be the most strongly attracted to a Cl- ion?

Which of the following molecules is polar?

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

Which of the following compounds contains ionic bonds?

What is one role of unpaired valance electrons?

If carbonic acid (H2CO3)were to undergo ionization,what would one of the products be?

Which of the following would have the smallest number of induced dipole-induced dipole interactions?

If a neutral atom loses one electron,what is the electrical charge of the atom?

Which of the following molecules has the highest boiling point?

If a neutral atom gains two electrons,what is the electrical charge of the atom?

Water, H2O,and methane,C H4 ,have about the same mass and differ by only one type of atom.Why is the boiling point of water so much higher than that of methane?

Why is it better to recycle metals than to mine more?

An atom loses an electron to another atom.Is this an example of a physical or chemical change?

How is the number of unpaired valence electrons in an atom related to the number of bonds that the atom can form?

What is the name for the following polyatomic ion? CH3CO2-1

Which of the following would be an ion with a double positive charge?

How many valence electrons does gallium (Ga,atomic no.= 31)have?

Why are ion-dipole attractions stronger than dipole-dipole attractions?

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 chloride ions (Cl^-1)are needed to balance the positive charge of a barium ion (Ba⁺²)?

Which of the following molecules would you expect to be the most strongly attracted to a Cl^- ion?

If carbonic acid (H₂CO₃)were to undergo ionization,what would one of the products be?

Water, H₂O,and methane,C H₄ ,have about the same mass and differ by only one type of atom.Why is the boiling point of water so much higher than that of methane?

What is the name for the following polyatomic ion? CH₃CO₂^-1