Question 1

Identify the shape for SiO4.

Accepted Answer

A)  tetrahedral 
B)  trigonal bipyramidal 
C)  trigonal planar 
D)  octahedral 
E)  trigonal pyramidal 
A)  tetrahedral 
B)  trigonal bipyramidal 
C)  trigonal planar 
D)  octahedral 
E)  trigonal pyramidal

Question 2

Identify the element with the smallest band gap.

Accepted Answer

A)  lead 
B)  silicon 
C)  germanium 
D)  carbon 
E)  tin 
A)  lead 
B)  silicon 
C)  germanium 
D)  carbon 
E)  tin

Question 3

A common use of polyurethane is

Accepted Answer

A)  tire cord. 
B)  fishing line. 
C)  foam cups. 
D)  spray-on insulation. 
E)  films. 
A)  tire cord. 
B)  fishing line. 
C)  foam cups. 
D)  spray-on insulation. 
E)  films.

Question 4

An allotrope of carbon that exists in the shape of a ball containing 36 to 100 carbons is called

Accepted Answer

A)  an octahedral. 
B)  a nanotube. 
C)  a diamond. 
D)  a fullerene. 
E)  graphite. 
A)  an octahedral. 
B)  a nanotube. 
C)  a diamond. 
D)  a fullerene. 
E)  graphite.

Question 5

Identify the type of interaction between atoms in a nonbonding atomic solid.

Accepted Answer

A)  polar bonding 
B)  ionic bonding 
C)  covalent bonding 
D)  hydrogen bonding 
E)  weak dispersion forces 
A)  polar bonding 
B)  ionic bonding 
C)  covalent bonding 
D)  hydrogen bonding 
E)  weak dispersion forces

Question 6

Identify an element that is NOT in nonoxide ceramics.

Accepted Answer

A)  nitrogen 
B)  silicon 
C)  aluminum 
D)  boron 
E)  carbon 
A)  nitrogen 
B)  silicon 
C)  aluminum 
D)  boron 
E)  carbon

Question 7

When an X-ray beam of l = 131.5 pm is incident on the surface of a copper crystal,it produces a maximum diffraction at an angle of q = 25.25 degrees.Assuming n = 1,calculate the separation between layers of copper atoms in the crystal.

Accepted Answer

A)  5.208 pm 
B)  263.0 pm 
C)  2.604 pm 
D)  308.3 pm 
E)  154.1 pm 
A)  5.208 pm 
B)  263.0 pm 
C)  2.604 pm 
D)  308.3 pm 
E)  154.1 pm

Question 8

Identify the characteristics of a body-centered cubic cell.

Accepted Answer

A)  edge length = 2   , 80% packing efficiency 
B)  edge length = 2r, 52% packing efficiency 
C)  edge length = 4r/   , 68% packing efficiency 
D)  edge length = 2   , 74% packing efficiency 
E)  edge length = 2r, 60% packing efficiency 
A)  edge length = 2   , 80% packing efficiency 
B)  edge length = 2r, 52% packing efficiency 
C)  edge length = 4r/   , 68% packing efficiency 
D)  edge length = 2   , 74% packing efficiency 
E)  edge length = 2r, 60% packing efficiency

Question 9

When two waves interact with the crests of one aligning with the troughs of the other is called

Accepted Answer

A)  complimentary interference. 
B)  destructive interference. 
C)  opposing interference. 
D)  constructive interference. 
E)  alignment interference. 
A)  complimentary interference. 
B)  destructive interference. 
C)  opposing interference. 
D)  constructive interference. 
E)  alignment interference.

Question 10

A common use of polyethylene is

Accepted Answer

A)  tire cord. 
B)  fishing line. 
C)  foam cups. 
D)  spray-on insulation. 
E)  films. 
A)  tire cord. 
B)  fishing line. 
C)  foam cups. 
D)  spray-on insulation. 
E)  films.

Question 11

Determine the radius of an Al atom (in pm)if the density of aluminum is 2.71 g/cm3.Aluminum crystallizes in a face centered cubic structure with an edge length of 2   r.

Accepted Answer

A)  143 pm 
B)  227 pm 
C)  96 pm 
D)  172 pm 
E)  193 pm 
A)  143 pm 
B)  227 pm 
C)  96 pm 
D)  172 pm 
E)  193 pm

Question 12

What is the edge length of a face-centered cubic unit cell made up of atoms having a radius of 125 pm?

Accepted Answer

A)  177 pm 
B)  354 pm 
C)  500 pm 
D)  1000 pm 
E)  800 pm 
A)  177 pm 
B)  354 pm 
C)  500 pm 
D)  1000 pm 
E)  800 pm

Question 13

Identify the element with the largest band gap.

Accepted Answer

A)  lead 
B)  silicon 
C)  germanium 
D)  carbon 
E)  tin 
A)  lead 
B)  silicon 
C)  germanium 
D)  carbon 
E)  tin

Question 14

Identify the type of interaction between atoms in a networking atomic solid.

Accepted Answer

A)  polar bonding 
B)  ionic bonding 
C)  covalent bonding 
D)  hydrogen bonding 
E)  weak dispersion forces 
A)  polar bonding 
B)  ionic bonding 
C)  covalent bonding 
D)  hydrogen bonding 
E)  weak dispersion forces

Question 15

Geologists estimate that ________ percent of the Earth's crust is composed of silicates.

Accepted Answer

A)  80 
B)  75 
C)  85 
D)  90 
E)  70 
A)  80 
B)  75 
C)  85 
D)  90 
E)  70

Question 16

Identify for the rhombohedral unit cell.

Accepted Answer

A)  a ≠ b = c 
B)  a = b ≠ c 
C)  a ≠ b ≠ c 
D)  a = b = c 
A)  a ≠ b = c 
B)  a = b ≠ c 
C)  a ≠ b ≠ c 
D)  a = b = c

Question 17

Identify the technique that determines the arrangement of atoms and measures the distance between them.

Accepted Answer

A)  x-ray diffraction 
B)  ultraviolet 
C)  nuclear magnetic resonance 
D)  infrared 
E)  atomic absorption 
A)  x-ray diffraction 
B)  ultraviolet 
C)  nuclear magnetic resonance 
D)  infrared 
E)  atomic absorption

Question 18

Define blooming with chocolate.

Accepted Answer

A)  mixed unevenly 
B)  shatters easily 
C)  melting unevenly 
D)  white residue on the surface of chocolate 
E)  black residue on the surface of chocolate 
A)  mixed unevenly 
B)  shatters easily 
C)  melting unevenly 
D)  white residue on the surface of chocolate 
E)  black residue on the surface of chocolate

Question 19

Which of the following is considered an atomic solid?

Accepted Answer

A)  F2 
B)  CsBr 
C)  N2 
D)  Nb 
E)  None of these is an atomic solid. 
A)  F2 
B)  CsBr 
C)  N2 
D)  Nb 
E)  None of these is an atomic solid.

Question 20

An allotrope of carbon that exists as interconnected rings that assume a cylindrical shape is called

Accepted Answer

A)  an octahedral. 
B)  a nanotube. 
C)  a diamond. 
D)  a fullerene. 
E)  graphite. 
A)  an octahedral. 
B)  a nanotube. 
C)  a diamond. 
D)  a fullerene. 
E)  graphite.

Exam 12: Solids and Modern Materials

Identify the shape for SiO4.

Identify the element with the smallest band gap.

A common use of polyurethane is

An allotrope of carbon that exists in the shape of a ball containing 36 to 100 carbons is called

Identify the type of interaction between atoms in a nonbonding atomic solid.

Identify an element that is NOT in nonoxide ceramics.

When an X-ray beam of l = 131.5 pm is incident on the surface of a copper crystal,it produces a maximum diffraction at an angle of q = 25.25 degrees.Assuming n = 1,calculate the separation between layers of copper atoms in the crystal.

Identify the characteristics of a body-centered cubic cell.

When two waves interact with the crests of one aligning with the troughs of the other is called

A common use of polyethylene is

Determine the radius of an Al atom (in pm)if the density of aluminum is 2.71 g/cm3.Aluminum crystallizes in a face centered cubic structure with an edge length of 2 r.

What is the edge length of a face-centered cubic unit cell made up of atoms having a radius of 125 pm?

Identify the element with the largest band gap.

Identify the type of interaction between atoms in a networking atomic solid.

Geologists estimate that ________ percent of the Earth's crust is composed of silicates.

Identify for the rhombohedral unit cell.

Identify the technique that determines the arrangement of atoms and measures the distance between them.

Define blooming with chocolate.

Which of the following is considered an atomic solid?

An allotrope of carbon that exists as interconnected rings that assume a cylindrical shape is called

Matter, measurement, and Problem Solving

Atoms and Elements

Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

Liquids,solids,and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Identify the shape for SiO₄.

Determine the radius of an Al atom (in pm)if the density of aluminum is 2.71 g/cm³.Aluminum crystallizes in a face centered cubic structure with an edge length of 2 r.