Question 1

A cat strolls across your back yard. An hour later, a dog with its nose to the ground follows the trail of the cat. Explain what is going on from a molecular point of view.

Accepted Answer

A) The dog is following the areas of increased density of the earth. 
B) The dog is smelling atoms from the cat. 
C) The dog is smelling molecules from the cat. 
D) The cat is leading the dog into a trap. 
A) The dog is following the areas of increased density of the earth. 
B) The dog is smelling atoms from the cat. 
C) The dog is smelling molecules from the cat. 
D) The cat is leading the dog into a trap. C

Question 2

Which covalent bond is more polar: a sulfur-bromine (S-Br)bond or a selenium-chlorine (Se-Cl)bond?

Accepted Answer

A) A selenium-chlorine bond should be more polar because of a greater difference in effective nuclear charge. 
B) A selenium-chlorine bond should be more polar because of a smaller difference in effective nuclear charge. 
C) A sulfur-bromine bond should be more polar because of a greater difference in effective nuclear charge. 
D) A sulfur-bromine bond should be more polar because of a smaller difference in effective nuclear charge. 
A) A selenium-chlorine bond should be more polar because of a greater difference in effective nuclear charge. 
B) A selenium-chlorine bond should be more polar because of a smaller difference in effective nuclear charge. 
C) A sulfur-bromine bond should be more polar because of a greater difference in effective nuclear charge. 
D) A sulfur-bromine bond should be more polar because of a smaller difference in effective nuclear charge. A

Question 3

A substance consisting of which molecule shown below should have a higher boiling point?

Accepted Answer

A) The molecule on the left, CO   , because it has a fewer number of atoms. 
B) The molecule on the right,     Cl, because it has a greater number of atoms. 
C) The molecule on the left, CO   , because it is less symmetrical. 
D) The molecule on the right,     Cl, because of electronegativity considerations. 
A) The molecule on the left, CO   , because it has a fewer number of atoms. 
B) The molecule on the right,     Cl, because it has a greater number of atoms. 
C) The molecule on the left, CO   , because it is less symmetrical. 
D) The molecule on the right,     Cl, because of electronegativity considerations. D

Question 4

Which of the following is a negative ion?

Accepted Answer

A) Na+ 
B) Na 
C) O2- 
D) O 
E) all of the above 
A) Na+ 
B) Na 
C) O2- 
D) O 
E) all of the above

Question 5

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 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

Which of the following is not a property of metal?

Accepted Answer

A) does not conduct heat well 
B) conducts electricity 
C) is shiny 
D) is strong, but can be bent 
E) All of the above are properties of metals. 
A) does not conduct heat well 
B) conducts electricity 
C) is shiny 
D) is strong, but can be bent 
E) All of the above are properties of metals.

Question 8

Which of the following molecules has a molecular shape that is linear?

Accepted Answer

A)  H2O 
B) CO2 
C) SO3 
D)  O3 
E) all of the above 
A)  H2O 
B) CO2 
C) SO3 
D)  O3 
E) all of the above

Question 9

Which of the following statements describes a polar molecule?

Accepted Answer

A) The electrons in the molecule are distributed evenly throughout the molecule. 
B) The molecules are usually not attracted to one another very strongly. 
C) Polar molecules have the weakest intermolecular interactions with ionic compounds. 
D) The molecules have a high degree of symmetry. 
E) None of these statements describe polar molecules. 
A) The electrons in the molecule are distributed evenly throughout the molecule. 
B) The molecules are usually not attracted to one another very strongly. 
C) Polar molecules have the weakest intermolecular interactions with ionic compounds. 
D) The molecules have a high degree of symmetry. 
E) None of these statements describe polar molecules.

Question 10

Three kids sitting equally apart around a table are sharing jelly beans. One of the kids named Billy, however, tends only to take jelly beans and only rarely gives one away. If each jelly bean represents an electron, who ends up being slightly negative? Who ends up being slightly positive?

Accepted Answer

A) Billy ends up being slightly negative, while the two other kids are both slightly positive. 
B) Billy ends up being slightly positive, while the two other kids are both slightly negative. 
C) One of the two kids other than Billy ends up slightly negative, but Billy and the third kid will both end up slightly positive. 
D) One of the two kids other than Billy ends up slightly positive, but Billy and the third kid will both end up slightly negative. 
A) Billy ends up being slightly negative, while the two other kids are both slightly positive. 
B) Billy ends up being slightly positive, while the two other kids are both slightly negative. 
C) One of the two kids other than Billy ends up slightly negative, but Billy and the third kid will both end up slightly positive. 
D) One of the two kids other than Billy ends up slightly positive, but Billy and the third kid will both end up slightly negative.

Question 11

Which of the following best describes how a metal atom behaves within a bulk of metal?

Accepted Answer

A) The metal ion shares its outermost electrons freely with its neighbors. 
B) The metal atoms have limited interaction with neighboring atoms. 
C) The metal atom shares its electrons in a very directional manner. 
D) The metal atom shares its electrons with only one other atom. 
E) none of the above 
A) The metal ion shares its outermost electrons freely with its neighbors. 
B) The metal atoms have limited interaction with neighboring atoms. 
C) The metal atom shares its electrons in a very directional manner. 
D) The metal atom shares its electrons with only one other atom. 
E) none of the above

Question 12

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 13

Ammonia, N   , is more polar than is borane, B   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 14

Which of the following compounds would be ionic?

Accepted Answer

A) CS2 
B) CF4 
C) SO2 
D) CaCl2 
E) SF5 
A) CS2 
B) CF4 
C) SO2 
D) CaCl2 
E) SF5

Question 15

What it the main difference between an ionic and a covalent bond?

Accepted Answer

A) One is the sharing of a pair of electrons, the other is the transfer of at least one electron. 
B) One involves electrons, the other does not involve any electrons. 
C) The electrons in both types of bonding undergo an exchange. 
D) The electrons are traded between the two atoms and this keeps the atoms close. 
E) Both bonds are the same, but named different to describe different atoms involved. 
A) One is the sharing of a pair of electrons, the other is the transfer of at least one electron. 
B) One involves electrons, the other does not involve any electrons. 
C) The electrons in both types of bonding undergo an exchange. 
D) The electrons are traded between the two atoms and this keeps the atoms close. 
E) Both bonds are the same, but named different to describe different atoms involved.

Question 16

What drives an atom to form a covalent bond: its nuclear charge or the need to have a filled outer shell?

Accepted Answer

A) its nuclear charge 
B) its need to have a filled outer shell 
C) both 
D) neither 
A) its nuclear charge 
B) its need to have a filled outer shell 
C) both 
D) neither

Question 17

Which of the above substances would have the lowest boiling point?

Accepted Answer

A) a 
B) b 
C) c 
D) All boil at the same temperature. 
E) All are gases. 
A) a 
B) b 
C) c 
D) All boil at the same temperature. 
E) All are gases.

Question 18

Why doesn't the sodium atom gain seven electrons so that its third shell becomes the filled outermost shell?

Accepted Answer

A) It would be too difficult for another atom to lose seven electrons. 
B) Only six additional electrons are required to fill the outermost shell of sodium. 
C) In gaining seven more electrons, sodium's fourth outer shell becomes filled. 
D) Sodium's nuclear charge is not strong enough to hold that many more electrons. 
A) It would be too difficult for another atom to lose seven electrons. 
B) Only six additional electrons are required to fill the outermost shell of sodium. 
C) In gaining seven more electrons, sodium's fourth outer shell becomes filled. 
D) Sodium's nuclear charge is not strong enough to hold that many more electrons.

Question 19

Which of the following statements is true?

Accepted Answer

A) The valence electrons are only from s and p orbitals in the valence shell. 
B) All of the electrons in the valence shell are valence electrons. 
C) The valence electrons are always paired in the valence shell. 
D) Paired valence electrons are more unstable than unpaired valence electrons. 
E) Nonbonding electrons are not found in the valence shell. 
A) The valence electrons are only from s and p orbitals in the valence shell. 
B) All of the electrons in the valence shell are valence electrons. 
C) The valence electrons are always paired in the valence shell. 
D) Paired valence electrons are more unstable than unpaired valence electrons. 
E) Nonbonding electrons are not found in the valence shell.

Question 20

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

Accepted Answer

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

A cat strolls across your back yard. An hour later, a dog with its nose to the ground follows the trail of the cat. Explain what is going on from a molecular point of view.

Which covalent bond is more polar: a sulfur-bromine (S-Br)bond or a selenium-chlorine (Se-Cl)bond?

A substance consisting of which molecule shown below should have a higher boiling point?

Which of the following is a negative ion?

Which bond is most polar?

Which molecule is most polar?

Which of the following is not a property of metal?

Which of the following molecules has a molecular shape that is linear?

Which of the following statements describes a polar molecule?

Three kids sitting equally apart around a table are sharing jelly beans. One of the kids named Billy, however, tends only to take jelly beans and only rarely gives one away. If each jelly bean represents an electron, who ends up being slightly negative? Who ends up being slightly positive?

Which of the following best describes how a metal atom behaves within a bulk of metal?

Which of the following elements has two valence electrons?

Ammonia, N , is more polar than is borane, B because it ________.

Which of the following compounds would be ionic?

What it the main difference between an ionic and a covalent bond?

What drives an atom to form a covalent bond: its nuclear charge or the need to have a filled outer shell?

Which of the above substances would have the lowest boiling point?

Why doesn't the sodium atom gain seven electrons so that its third shell becomes the filled outermost shell?

Which of the following statements is true?

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

About Science

Particles of Matter

Elements of Chemistry

Subatomic Particles

The Atomic Nucleus

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

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Exam 6: How Atoms Bond

A cat strolls across your back yard. An hour later, a dog with its nose to the ground follows the trail of the cat. Explain what is going on from a molecular point of view.

Which covalent bond is more polar: a sulfur-bromine (S-Br)bond or a selenium-chlorine (Se-Cl)bond?

A substance consisting of which molecule shown below should have a higher boiling point?

Which of the following is a negative ion?

Which bond is most polar?

Which molecule is most polar?

Which of the following is not a property of metal?

Which of the following molecules has a molecular shape that is linear?

Which of the following statements describes a polar molecule?

Three kids sitting equally apart around a table are sharing jelly beans. One of the kids named Billy, however, tends only to take jelly beans and only rarely gives one away. If each jelly bean represents an electron, who ends up being slightly negative? Who ends up being slightly positive?

Which of the following best describes how a metal atom behaves within a bulk of metal?

Which of the following elements has two valence electrons?

Ammonia, N , is more polar than is borane, B because it ________.

Which of the following compounds would be ionic?

What it the main difference between an ionic and a covalent bond?

What drives an atom to form a covalent bond: its nuclear charge or the need to have a filled outer shell?

Which of the above substances would have the lowest boiling point?

Why doesn't the sodium atom gain seven electrons so that its third shell becomes the filled outermost shell?

Which of the following statements is true?

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

About Science

Particles of Matter

Elements of Chemistry

Subatomic Particles

The Atomic Nucleus

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

Filters

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