Question 1

Molecular solids consist of atoms or molecules held together by ________.

Accepted Answer

A) dipole-dipole forces only 
B) Metallic bonds only 
C) London dispersion forces and hydrogen bonds only 
D) hydrogen bonds only 
E) dipole-dipole forces, London dispersion forces, and/or hydrogen bonds 
A) dipole-dipole forces only 
B) Metallic bonds only 
C) London dispersion forces and hydrogen bonds only 
D) hydrogen bonds only 
E) dipole-dipole forces, London dispersion forces, and/or hydrogen bonds

Question 2

NaCl crystallizes in a face-centered cubic cell.What is the total number of ions (Na+ ions and Cl- ions)that lie within a unit cell of NaCl?

Accepted Answer

A) 2 
B) 4 
C) 8 
D) 6 
E) 5 
A) 2 
B) 4 
C) 8 
D) 6 
E) 5

Question 3

KF crystallizes in a face-centered cubic cell.What is the total number of ions (K+ ions and F- ions)that lie within a unit cell of KF?

Accepted Answer

A) 2 
B) 8 
C) 6 
D) 5 
E) 4 
A) 2 
B) 8 
C) 6 
D) 5 
E) 4

Question 4

________ have properties that depend on the manner in which the solid is formed.

Accepted Answer

A) Pure metals 
B) Heterogeneous alloys 
C) Homogeneous alloys 
D) Pure alloys 
A) Pure metals 
B) Heterogeneous alloys 
C) Homogeneous alloys 
D) Pure alloys

Question 5

CsCl crystallizes in a unit cell that contains a Cs+ ion at the center of a cube and a Cl- ion at each corner.The unit cell of CsCl is ________.

Accepted Answer

A) close packed 
B) body-centered cubic 
C) face-centered cubic 
D) amorphous 
E) primitive cubic 
A) close packed 
B) body-centered cubic 
C) face-centered cubic 
D) amorphous 
E) primitive cubic

Question 6

What two primary metals are alloyed to produce bronze?

Accepted Answer

The answer of What two primary metals are alloyed to...

Question 7

Crystalline solids differ from amorphous solids in that crystalline solids have ________.

Accepted Answer

A) appreciable intermolecular attractive forces 
B) a long-range repeating pattern of atoms, molecules, or ions 
C) atoms, molecules, or ions that are close together 
D) much larger atoms, molecules, or ions 
E) no orderly structure 
A) appreciable intermolecular attractive forces 
B) a long-range repeating pattern of atoms, molecules, or ions 
C) atoms, molecules, or ions that are close together 
D) much larger atoms, molecules, or ions 
E) no orderly structure

Question 8

Natural rubber is too soft and chemically reactive for practical applications.________ of natural rubber entails crosslinking reactive polymer chains with sulfur atoms.

Accepted Answer

A) Addition 
B) Conversion 
C) Vulcanization 
D) Condensation 
E) Polymerization 
A) Addition 
B) Conversion 
C) Vulcanization 
D) Condensation 
E) Polymerization

Question 9

All of the following are polymers except ________.

Accepted Answer

A) nylon 
B) cellulose 
C) bronze 
D) starch 
E) protein 
A) nylon 
B) cellulose 
C) bronze 
D) starch 
E) protein

Question 10

Which of the following can be used as an elemental semiconductor?

Accepted Answer

A) Au 
B) H 
C) Ge 
D) Li 
E) Ne 
A) Au 
B) H 
C) Ge 
D) Li 
E) Ne

Question 11

What portion of the volume of each atom or ion on the face of a unit cell is actually within the unit cell?

Accepted Answer

A) 1/2 
B) 1/4 
C) 3/4 
D) all of it 
E) none of it 
A) 1/2 
B) 1/4 
C) 3/4 
D) all of it 
E) none of it

Question 12

If the electronic structure of a solid substance consists of a valence band that is completely filled with electrons and there is a large energy gap to the next set of orbitals,then this substance will be a(n)________.

Accepted Answer

A) alloy 
B) insulator 
C) conductor 
D) semiconductor 
E) nonmetal 
A) alloy 
B) insulator 
C) conductor 
D) semiconductor 
E) nonmetal

Question 13

Consider the following statements about crystalline solids: (i)Molecules or atoms in molecular solids are held together via ionic bonds.
(ii)Metallic solids have atoms in the points of the crystal lattice.
(iii)Ionic solids have formula units in the point of the crystal lattice.
(iv)Molecules in covalent-network solids are connected via a network of covalent bonds.
Which of the statements is true?

Accepted Answer

A) (i) 
B) (ii) 
C) (iii) 
D) (iv) 
E) none 
A) (i) 
B) (ii) 
C) (iii) 
D) (iv) 
E) none

Question 14

What happens to a polymer as it becomes more crystalline?

Accepted Answer

A) its melting point decreases 
B) its density decreases 
C) its yield stress decreases 
D) its stiffness decreases 
E) None of the above is correct. 
A) its melting point decreases 
B) its density decreases 
C) its yield stress decreases 
D) its stiffness decreases 
E) None of the above is correct.

Question 15

CsCl crystallizes in a unit cell that contains the Cs+ ion at the center of a cube that has a Cl- at each corner.Each unit cell contains ________ Cs+ ion(s)and ________ Cl- ion(s),respectively.

Accepted Answer

A) 1, 8 
B) 2, 1 
C) 1, 1 
D) 2, 2 
E) 2, 4 
A) 1, 8 
B) 2, 1 
C) 1, 1 
D) 2, 2 
E) 2, 4

Question 16

What is the percent gold in a 6 karat gold link?

Accepted Answer

A) 94 
B) 6.0 
C) 75 
D) 25 
E) 1.0 × 102 
A) 94 
B) 6.0 
C) 75 
D) 25 
E) 1.0 × 102

Question 17

Of the following,________ may be added to steel to modify its properties.

Accepted Answer

A) carbon only 
B) carbon and nickel 
C) nickel only 
D) copper only 
E) none of the above 
A) carbon only 
B) carbon and nickel 
C) nickel only 
D) copper only 
E) none of the above

Question 18

All of the following can form a solid with a lattice structure similar to that of sodium chloride except ________.

Accepted Answer

A) NaF 
B) CuBr2 
C) LiCl 
D) KI 
E) MgO 
A) NaF 
B) CuBr2 
C) LiCl 
D) KI 
E) MgO

Question 19

A metallic material that is composed of two or more elements is called a(n)________.

Accepted Answer

A) homogeneous mixture 
B) pure metal 
C) nonmetal 
D) alloy 
E) mineral 
A) homogeneous mixture 
B) pure metal 
C) nonmetal 
D) alloy 
E) mineral

Question 20

All of the following are natural polymers except ________.

Accepted Answer

A) silk 
B) starch 
C) nylon 
D) protein 
E) cellulose 
A) silk 
B) starch 
C) nylon 
D) protein 
E) cellulose

Exam 12: Solids and Modern Materials

Molecular solids consist of atoms or molecules held together by ________.

NaCl crystallizes in a face-centered cubic cell.What is the total number of ions (Na+ ions and Cl- ions)that lie within a unit cell of NaCl?

KF crystallizes in a face-centered cubic cell.What is the total number of ions (K+ ions and F- ions)that lie within a unit cell of KF?

________ have properties that depend on the manner in which the solid is formed.

CsCl crystallizes in a unit cell that contains a Cs+ ion at the center of a cube and a Cl- ion at each corner.The unit cell of CsCl is ________.

What two primary metals are alloyed to produce bronze?

Crystalline solids differ from amorphous solids in that crystalline solids have ________.

Natural rubber is too soft and chemically reactive for practical applications.________ of natural rubber entails crosslinking reactive polymer chains with sulfur atoms.

All of the following are polymers except ________.

Which of the following can be used as an elemental semiconductor?

What portion of the volume of each atom or ion on the face of a unit cell is actually within the unit cell?

If the electronic structure of a solid substance consists of a valence band that is completely filled with electrons and there is a large energy gap to the next set of orbitals,then this substance will be a(n)________.

What happens to a polymer as it becomes more crystalline?

CsCl crystallizes in a unit cell that contains the Cs+ ion at the center of a cube that has a Cl- at each corner.Each unit cell contains ________ Cs+ ion(s)and ________ Cl- ion(s),respectively.

What is the percent gold in a 6 karat gold link?

Of the following,________ may be added to steel to modify its properties.

All of the following can form a solid with a lattice structure similar to that of sodium chloride except ________.

A metallic material that is composed of two or more elements is called a(n)________.

All of the following are natural polymers except ________.

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

NaCl crystallizes in a face-centered cubic cell.What is the total number of ions (Na⁺ ions and Cl^- ions)that lie within a unit cell of NaCl?

KF crystallizes in a face-centered cubic cell.What is the total number of ions (K⁺ ions and F^- ions)that lie within a unit cell of KF?

CsCl crystallizes in a unit cell that contains a Cs⁺ ion at the center of a cube and a Cl^- ion at each corner.The unit cell of CsCl is ________.

CsCl crystallizes in a unit cell that contains the Cs⁺ ion at the center of a cube that has a Cl^- at each corner.Each unit cell contains Cs⁺ ion(s)and Cl^- ion(s),respectively.