Question 1

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 2

How many atoms are contained in a face-centered cubic unit cell?

Accepted Answer

The answer of How many atoms are contained in a...

Question 3

What is the typical effect of the addition of an interstitial element on the properties of a metal?

Accepted Answer

A) increase in malleability and corrosion resistance 
B) increase in hardness and strength, decrease in ductility 
C) decrease in melting point and increase in ductility 
D) decrease in conductivity and increase in brittleness 
E) increased surface luster 
A) increase in malleability and corrosion resistance 
B) increase in hardness and strength, decrease in ductility 
C) decrease in melting point and increase in ductility 
D) decrease in conductivity and increase in brittleness 
E) increased surface luster

Question 4

Of the following, only ________ is a condensation polymer.

Accepted Answer

A) Nylon 6,6 
B) polyethylene 
C) polypropylene 
D) polystyrene 
E) polyvinyl chloride 
A) Nylon 6,6 
B) polyethylene 
C) polypropylene 
D) polystyrene 
E) polyvinyl chloride

Question 5

Polymers formed from two different monomers are called ________.

Accepted Answer

The answer of Polymers formed from two different monomers are...

Question 6

The empirical formula of an addition polymer ________.

Accepted Answer

A) is the same as that of the monomer from which it is formed except that 2 H and 1 O have been added 
B) is the same as that of the monomer from which it is formed except that 2 H and 1 O have been subtracted 
C) is the same as that of the monomer from which it is formed 
D) is the same as that of the monomer from which it is formed except that 2 H and 1 C have been added 
E) is the same as that of the monomer from which it is formed except that 2 H and 1 C have been subtracted 
A) is the same as that of the monomer from which it is formed except that 2 H and 1 O have been added 
B) is the same as that of the monomer from which it is formed except that 2 H and 1 O have been subtracted 
C) is the same as that of the monomer from which it is formed 
D) is the same as that of the monomer from which it is formed except that 2 H and 1 C have been added 
E) is the same as that of the monomer from which it is formed except that 2 H and 1 C have been subtracted

Question 7

Intermetallic compounds are examples of

Accepted Answer

A) homogeneous alloys. 
B) heterogeneous alloys. 
C) interstitial alloys. 
D) solution alloys. 
E) ionic compounds. 
A) homogeneous alloys. 
B) heterogeneous alloys. 
C) interstitial alloys. 
D) solution alloys. 
E) ionic compounds.

Question 8

The process of doping can produce a(n)________, which can greatly ________ intrinsic conductivity.

Accepted Answer

A) n-type semiconductor, increase 
B) p-type semiconductor, decrease 
C) non-metal, increase 
D) non-metal, decrease 
E) allotrope, diminish 
A) n-type semiconductor, increase 
B) p-type semiconductor, decrease 
C) non-metal, increase 
D) non-metal, decrease 
E) allotrope, diminish

Question 9

When the size of a semiconductor particle or crystal ________, the band gap energy ________.

Accepted Answer

A) decreases, decreases 
B) decreases, remains the same 
C) increases, increases 
D) decreases, increases 
E) decreases, goes to zero 
A) decreases, decreases 
B) decreases, remains the same 
C) increases, increases 
D) decreases, increases 
E) decreases, goes to zero

Question 10

12 karat gold contains ________% gold.

Accepted Answer

A) 12 
B) 25 
C) 50. 
D) 75 
E) 1.0 × 102 
A) 12 
B) 25 
C) 50. 
D) 75 
E) 1.0 × 102

Question 11

For a substitutional alloy to form, the two metals combined must have similar

Accepted Answer

A) ionization potential and electron affinity. 
B) number of valance electrons and electronegativity. 
C) reduction potential and size. 
D) atomic radii and chemical bonding properties. 
E) band gap and reactivity. 
A) ionization potential and electron affinity. 
B) number of valance electrons and electronegativity. 
C) reduction potential and size. 
D) atomic radii and chemical bonding properties. 
E) band gap and reactivity.

Question 12

Heterogeneous alloys

Accepted Answer

A) have properties that depend on composition. 
B) have properties that depend on the manner in which the melt is solidified. 
C) have properties that depend on the manner in which the solid is formed. 
D) All of the above are true. 
A) have properties that depend on composition. 
B) have properties that depend on the manner in which the melt is solidified. 
C) have properties that depend on the manner in which the solid is formed. 
D) All of the above are true.

Question 13

A sample of natural rubber (200.0 g)is vulcanized, with the complete consumption of 4.8 g of sulfur. Natural rubber is a polymer of isoprene (C5H8). Four sulfur atoms are used in each crosslink connection. What percent of the isoprene units will be crosslinked?

Accepted Answer

A) 7.6 
B) 5.1 
C) 2.5 
D) 9.4 
E) 1.3 
A) 7.6 
B) 5.1 
C) 2.5 
D) 9.4 
E) 1.3

Question 14

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 15

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 16

A material that contains more than one element and has the characteristic properties of metals is called a(n)________.

Accepted Answer

The answer of A material that contains more than one...

Question 17

A plasticizer makes a polymer more pliable by reducing the interactions between polymer chains.

Accepted Answer

A) True 
 B)False

Question 18

Which will have a larger band gap: GaN, GaP, GaAs, or GaSb?

Accepted Answer

A) GaN 
B) GaP 
C) GaAs 
D) GaSb 
E) All choices have identical band gaps. 
A) GaN 
B) GaP 
C) GaAs 
D) GaSb 
E) All choices have identical band gaps.

Question 19

Alloys generally differ from compounds in that

Accepted Answer

A) the former always contain some carbon. 
B) the former always contain some iron. 
C) the former always have semiconductor properties. 
D) the atomic ratios of the constituent elements in the former are not fixed and may vary over a wide range. 
E) the former never contain a transition element. 
A) the former always contain some carbon. 
B) the former always contain some iron. 
C) the former always have semiconductor properties. 
D) the atomic ratios of the constituent elements in the former are not fixed and may vary over a wide range. 
E) the former never contain a transition element.

Question 20

The unit cell with all sides the same length and all angles equal to 90° that has lattice points only at the corners is called ________.

Accepted Answer

A) monoclinic 
B) body-centered cubic 
C) primitive cubic 
D) face-centered cubic 
E) spherical cubic 
A) monoclinic 
B) body-centered cubic 
C) primitive cubic 
D) face-centered cubic 
E) spherical cubic

Exam 12: Solids and Modern Materials

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

How many atoms are contained in a face-centered cubic unit cell?

What is the typical effect of the addition of an interstitial element on the properties of a metal?

Of the following, only ________ is a condensation polymer.

Polymers formed from two different monomers are called ________.

The empirical formula of an addition polymer ________.

Intermetallic compounds are examples of

The process of doping can produce a(n)________, which can greatly ________ intrinsic conductivity.

When the size of a semiconductor particle or crystal ________, the band gap energy ________.

12 karat gold contains ________% gold.

For a substitutional alloy to form, the two metals combined must have similar

Heterogeneous alloys

A sample of natural rubber (200.0 g)is vulcanized, with the complete consumption of 4.8 g of sulfur. Natural rubber is a polymer of isoprene (C5H8). Four sulfur atoms are used in each crosslink connection. What percent of the isoprene units will be crosslinked?

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)________.

A material that contains more than one element and has the characteristic properties of metals is called a(n)________.

A plasticizer makes a polymer more pliable by reducing the interactions between polymer chains.

Which will have a larger band gap: GaN, GaP, GaAs, or GaSb?

Alloys generally differ from compounds in that

The unit cell with all sides the same length and all angles equal to 90° that has lattice points only at the corners is called ________.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

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

The process of doping can produce a(n), which can greatly intrinsic conductivity.

When the size of a semiconductor particle or crystal , the band gap energy .

A sample of natural rubber (200.0 g)is vulcanized, with the complete consumption of 4.8 g of sulfur. Natural rubber is a polymer of isoprene (C₅H₈). Four sulfur atoms are used in each crosslink connection. What percent of the isoprene units will be crosslinked?