Question 1

Write the chemical formulas for both polyethylene and the monomer from which it is formed.

Accepted Answer

Polyethyle

Question 2

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 3

Nylon is formed by the reaction of a __________ with a __________.

Accepted Answer

The answer of Nylon is formed by the reaction of...

Question 4

The process of doping can produce a __________ 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 5

Gallium crystallizes in a primitive cubic unit cell. The length of the unit cell edge is 3.70 Å. The radius of a Ga atom is __________ Å.

Accepted Answer

A) 7.40 
B) 3.70 
C) 1.85 
D) 0.930 
E) Insufficient data is given. 
A) 7.40 
B) 3.70 
C) 1.85 
D) 0.930 
E) Insufficient data is given.

Question 6

Semiconductor particles with diameters of 1-10 nm are called __________.

Accepted Answer

The answer of Semiconductor particles with diameters of 1-10 nm...

Question 7

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 8

__________ are materials characterized by an energy gap between a filled valence band and an empty conduction band.

Accepted Answer

The answer of __________ are materials characterized by an energy...

Question 9

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 10

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 11

The scattering of light waves upon passing through a narrow slit is called __________.

Accepted Answer

A) diffusion 
B) grating 
C) diffraction 
D) adhesion 
E) incidence 
A) diffusion 
B) grating 
C) diffraction 
D) adhesion 
E) incidence

Question 12

The molecular-orbital model for Ge shows it to be

Accepted Answer

A) a conductor, because all the lower energy band orbitals are filled and the gap between the lower and higher bands is large. 
B) an insulator, because all the lower energy band orbitals are filled and the gap between the lower and higher bands is large. 
C) a semiconductor, because the gap between the filled lower and empty higher energy bands is relatively small. 
D) a semiconductor, because the gap between the filled lower and empty higher energy bands is large. 
E) a conductor, because its lower energy band orbitals are only partially filled. 
A) a conductor, because all the lower energy band orbitals are filled and the gap between the lower and higher bands is large. 
B) an insulator, because all the lower energy band orbitals are filled and the gap between the lower and higher bands is large. 
C) a semiconductor, because the gap between the filled lower and empty higher energy bands is relatively small. 
D) a semiconductor, because the gap between the filled lower and empty higher energy bands is large. 
E) a conductor, because its lower energy band orbitals are only partially filled.

Question 13

Blue LEDs are usually made of __________.

Accepted Answer

A) GaAs 
B) GaP 
C) GaO 
D) GaS 
E) GaN 
A) GaAs 
B) GaP 
C) GaO 
D) GaS 
E) GaN

Question 14

Many metals are ductile, which means that they can be hammered into thin sheets.

Accepted Answer

A) True 
 B)False

Question 15

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 16

Which one of the following is an addition polymer with the same structure as polyethylene except that one hydrogen on every other carbon is replaced by a benzene ring?

Accepted Answer

A) polyvinyl chloride 
B) polypropylene 
C) polystyrene 
D) polyurethane 
E) nylon 6, 6 
A) polyvinyl chloride 
B) polypropylene 
C) polystyrene 
D) polyurethane 
E) nylon 6, 6

Question 17

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 18

Which property of metals cannot be explained with the electron-sea model?

Accepted Answer

A) shine 
B) high thermal conductivity 
C) high electric conductivity 
D) malleability and ductility 
E) trends in melting points 
A) shine 
B) high thermal conductivity 
C) high electric conductivity 
D) malleability and ductility 
E) trends in melting points

Question 19

An alloy is a

Accepted Answer

A) heterogeneous mixture of two metals. 
B) pure metal. 
C) metallic material that is composed of two or more elements. 
D) nonmetal with some properties of a metal. 
E) a mineral containing two or more metals. 
A) heterogeneous mixture of two metals. 
B) pure metal. 
C) metallic material that is composed of two or more elements. 
D) nonmetal with some properties of a metal. 
E) a mineral containing two or more metals.

Question 20

The monomer that is polymerized to make natural rubber is __________.

Accepted Answer

A) melamine 
B) formaldehyde 
C) ethylene 
D) isoprene 
E) adipic acid 
A) melamine 
B) formaldehyde 
C) ethylene 
D) isoprene 
E) adipic acid

Exam 12: Solids and Modern Materials

Write the chemical formulas for both polyethylene and the monomer from which it is formed.

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

Nylon is formed by the reaction of a __________ with a __________.

The process of doping can produce a __________ which can greatly __________ intrinsic conductivity.

Gallium crystallizes in a primitive cubic unit cell. The length of the unit cell edge is 3.70 Å. The radius of a Ga atom is __________ Å.

Semiconductor particles with diameters of 1-10 nm are called __________.

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?

__________ are materials characterized by an energy gap between a filled valence band and an empty conduction band.

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

Heterogeneous alloys

The scattering of light waves upon passing through a narrow slit is called __________.

The molecular-orbital model for Ge shows it to be

Blue LEDs are usually made of __________.

Many metals are ductile, which means that they can be hammered into thin sheets.

Alloys generally differ from compounds in that

Which one of the following is an addition polymer with the same structure as polyethylene except that one hydrogen on every other carbon is replaced by a benzene ring?

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

Which property of metals cannot be explained with the electron-sea model?

An alloy is a

The monomer that is polymerized to make natural rubber is __________.

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

Nylon is formed by the reaction of a with a .

The process of doping can produce a which can greatly intrinsic conductivity.

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?