Question 1

When Si is doped with P, it produces a(n) ________-type semiconductor.

Accepted Answer

The answer of When Si is doped with P, it...

Question 2

X-ray diffraction (XRD) makes use of the Bragg equation in which$\theta$ is the ________

Accepted Answer

A)  wavelength of the X-ray. 
B)  distance between layers of identical particles in the lattice. 
C)  angle of incidence of the X-ray beam. 
D)  dimension of the unit cell. 
E)  angle of diffraction of the X-ray beam. 
A)  wavelength of the X-ray. 
B)  distance between layers of identical particles in the lattice. 
C)  angle of incidence of the X-ray beam. 
D)  dimension of the unit cell. 
E)  angle of diffraction of the X-ray beam.

Question 3

The alpha form of polonium (Po) crystallizes as a simple cubic unit cell with an edge length of
335 pm. What is the atomic radius of polonium?

Accepted Answer

A)  84 pm 
B)  168 pm 
C)  335 pm 
D)  175 pm 
E)  808 pm 
A)  84 pm 
B)  168 pm 
C)  335 pm 
D)  175 pm 
E)  808 pm

Question 4

In the cesium chloride unit cell shown below, the cesium ions sit on the corners of a cube. What is the name of this unit cell?

Accepted Answer

A)  simple cubic 
B)  chloride-centered cubic 
C)  face-centered cubic 
D)  cubic-centered 
E)  body-centered cubic 
A)  simple cubic 
B)  chloride-centered cubic 
C)  face-centered cubic 
D)  cubic-centered 
E)  body-centered cubic

Question 5

Iron (Fe) has a density of 7.874 g/cm3 and crystallizes in a body-centered cubic structure. What is the atomic radius of iron?

Accepted Answer

A)  99 pm 
B)  114 pm 
C)  124 pm 
D)  143 pm 
E)  255 pm 
A)  99 pm 
B)  114 pm 
C)  124 pm 
D)  143 pm 
E)  255 pm

Question 6

Which of the following can be varied to change the physical properties of an alloy?
I.The elements used
II.The proportions used
III.The type of hole each element occupies

Accepted Answer

A)  I only 
B)  II only 
C)  III only 
D)  I and II only 
E)  I, II, and III 
A)  I only 
B)  II only 
C)  III only 
D)  I and II only 
E)  I, II, and III

Question 7

Sphalerite (ZnS) is the chief ore of zinc. In the unit cell of sphalerite, ________

Accepted Answer

A)  all of the octahedral holes are filled with cations. 
B)  half of the octahedral holes are filled with cations. 
C)  all of the tetrahedral holes are filled with cations. 
D)  half of the tetrahedral holes are filled with cations. 
E)  cations occupy standard atomic positions in the unit cell, not the holes. 
A)  all of the octahedral holes are filled with cations. 
B)  half of the octahedral holes are filled with cations. 
C)  all of the tetrahedral holes are filled with cations. 
D)  half of the tetrahedral holes are filled with cations. 
E)  cations occupy standard atomic positions in the unit cell, not the holes.

Question 8

How many nearest neighbor atoms are there around each atom in a simple cubic unit cell?

Accepted Answer

A)  4 
B)  6 
C)  8 
D)  10 
E)  12 
A)  4 
B)  6 
C)  8 
D)  10 
E)  12

Question 9

Yttrium-barium-copper oxides are ceramics with ________

Accepted Answer

A)  photovoltaic properties. 
B)  superstitial substitution sites. 
C)  superconductivity at low temperatures. 
D)  liquid crystalline properties. 
E)  All of the above. 
A)  photovoltaic properties. 
B)  superstitial substitution sites. 
C)  superconductivity at low temperatures. 
D)  liquid crystalline properties. 
E)  All of the above.

Question 10

The thermal and electrical insulating qualities of ceramics can be explained by ________

Accepted Answer

A)  significant band gaps. 
B)  small band gaps. 
C)  Cooper pairs. 
D)  the Meissner effect. 
E)  the low conductivity of positively charged holes. 
A)  significant band gaps. 
B)  small band gaps. 
C)  Cooper pairs. 
D)  the Meissner effect. 
E)  the low conductivity of positively charged holes.

Question 11

The alpha form of polonium (Po) crystallizes as a simple cubic unit cell with an edge length of 335 pm. What is the atomic radius of polonium in picometers?

Accepted Answer

The answer of The alpha form of polonium (Po) crystallizes...

Question 12

In a simple cubic unit cell there is/are ________ atom(s), in a face-centered cubic cell there is/are ________ atom(s), and in a body-centered cubic cell there is/are ________ atom(s).

Accepted Answer

The answer of In a simple cubic unit cell there...

Question 13

The face-centered cubic unit cell has ________ tetrahedral holes.

Accepted Answer

A)  0 
B)  1 
C)  4 
D)  8 
E)  12 
A)  0 
B)  1 
C)  4 
D)  8 
E)  12

Question 14

If a face-centered cubic unit cell has a volume of 1.447* 108 pm3 and the ions at the corners touch the ion on the face, what must be the ion's radius?

Accepted Answer

A)  186 pm 
B)  388 pm 
C)  4,243 pm 
D)  125 pm 
E)  1,050 pm 
A)  186 pm 
B)  388 pm 
C)  4,243 pm 
D)  125 pm 
E)  1,050 pm

Question 15

A ceramic is a chemically resistant and heat-resistant solid produced by heating ________

Accepted Answer

A)  compounds containing cerium. 
B)  clays. 
C)  sand and water. 
D)  any compound containing aluminum and sulfur. 
E)  mixtures containing yttrium and barium. 
A)  compounds containing cerium. 
B)  clays. 
C)  sand and water. 
D)  any compound containing aluminum and sulfur. 
E)  mixtures containing yttrium and barium.

Question 16

What is the likely unit cell for ionic compounds of 1:1 stoichiometry in which the difference in the radii is only about 25% or less?

Accepted Answer

A)  rock salt 
B)  sphalerite 
C)  fluorite 
D)  cubic 
E)  antifluorite 
A)  rock salt 
B)  sphalerite 
C)  fluorite 
D)  cubic 
E)  antifluorite

Question 17

The bonding in solid-state metals can be described as ________

Accepted Answer

A)  nonexistent. 
B)  a covalent network. 
C)  an electron sea. 
D)  highly directional. 
E)  ionic. 
A)  nonexistent. 
B)  a covalent network. 
C)  an electron sea. 
D)  highly directional. 
E)  ionic.

Question 18

Iron (Fe) crystallizes as a body-centered unit cell with an edge length of 287 pm. What is the atomic radius of iron in picometers?

Accepted Answer

The answer of Iron (Fe) crystallizes as a body-centered unit...

Question 19

Silicon dioxide exists as ________

Accepted Answer

A)  a covalent network solid. 
B)  a metallic solid. 
C)  a semimetallic solid. 
D)  a molecular solid. 
E)  All of the above. 
A)  a covalent network solid. 
B)  a metallic solid. 
C)  a semimetallic solid. 
D)  a molecular solid. 
E)  All of the above.

Question 20

The cubic closest-packed crystal structure has a ________ layering pattern that produces a ________ unit cell.

Accepted Answer

A)  ababab; hexagonal 
B)  ababab; face-centered cubic 
C)  abcabcabc; hexagonal 
D)  abcabcabc; face-centered cubic 
E)  abcabcabc; body-centered cubic 
A)  ababab; hexagonal 
B)  ababab; face-centered cubic 
C)  abcabcabc; hexagonal 
D)  abcabcabc; face-centered cubic 
E)  abcabcabc; body-centered cubic

Exam 12: Solids: Structures and Applications

When Si is doped with P, it produces a(n) ________-type semiconductor.

X-ray diffraction (XRD) makes use of the Bragg equation in which θ\thetaθ is the ________

The alpha form of polonium (Po) crystallizes as a simple cubic unit cell with an edge length of 335 pm. What is the atomic radius of polonium?

In the cesium chloride unit cell shown below, the cesium ions sit on the corners of a cube. What is the name of this unit cell?

Iron (Fe) has a density of 7.874 g/cm3 and crystallizes in a body-centered cubic structure. What is the atomic radius of iron?

Which of the following can be varied to change the physical properties of an alloy? I.The elements used II.The proportions used III.The type of hole each element occupies

Sphalerite (ZnS) is the chief ore of zinc. In the unit cell of sphalerite, ________

How many nearest neighbor atoms are there around each atom in a simple cubic unit cell?

Yttrium-barium-copper oxides are ceramics with ________

The thermal and electrical insulating qualities of ceramics can be explained by ________

The alpha form of polonium (Po) crystallizes as a simple cubic unit cell with an edge length of 335 pm. What is the atomic radius of polonium in picometers?

In a simple cubic unit cell there is/are ________ atom(s), in a face-centered cubic cell there is/are ________ atom(s), and in a body-centered cubic cell there is/are ________ atom(s).

The face-centered cubic unit cell has ________ tetrahedral holes.

If a face-centered cubic unit cell has a volume of 1.447* 108 pm3 and the ions at the corners touch the ion on the face, what must be the ion's radius?

A ceramic is a chemically resistant and heat-resistant solid produced by heating ________

What is the likely unit cell for ionic compounds of 1:1 stoichiometry in which the difference in the radii is only about 25% or less?

The bonding in solid-state metals can be described as ________

Iron (Fe) crystallizes as a body-centered unit cell with an edge length of 287 pm. What is the atomic radius of iron in picometers?

Silicon dioxide exists as ________

The cubic closest-packed crystal structure has a ________ layering pattern that produces a ________ unit cell.

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: the Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Organic Chemistry: Fuels, Pharmaceuticals, Materials, and Life

Chemical Kinetics: Reactions in the Air We Breathe

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acid-Base and Solubility Equilibria: Reactions in Soil and Water

Metal Ions: Colorful and Essential

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry: Applications to Energy and Medicine

Life and the Periodic Table

Filters

X-ray diffraction (XRD) makes use of the Bragg equation in which $\theta$ is the ________

Iron (Fe) has a density of 7.874 g/cm³ and crystallizes in a body-centered cubic structure. What is the atomic radius of iron?

In a simple cubic unit cell there is/are atom(s), in a face-centered cubic cell there is/are atom(s), and in a body-centered cubic cell there is/are atom(s).

If a face-centered cubic unit cell has a volume of 1.447* 10⁸ pm³ and the ions at the corners touch the ion on the face, what must be the ion's radius?

The cubic closest-packed crystal structure has a layering pattern that produces a unit cell.