GaAs and AlGaAs2 are used in what type of semiconductor device?

A) light-emitting diode (LE D) B) sound-emitting C) np D) They are not semiconductors. E) dual voltage A) light-emitting diode (LE D) B) sound-emitting C) np D) They are not semiconductors. E) dual voltage

Exam 18: The Solid State a Particulate View

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According to band theory, when the lower-energy band is separated from the higher-energyband by a large band gap, the material will act as a(n) of electricity.

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Question 21

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

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Question 22

Just as visible light is diffracted by the finely spaced grooves on a compact disc (CD), electromagnetic radiation in the _______range has the appropriate wavelength to be diffracted by atoms and electron density in a crystalline lattice.

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Question 23

Iridium adopts an fcc structure with a unit cell edge length of approximately 383.9 pm.Estimate A) the radius of an Ir atom, B) the length of the face diagonal from opposite corners on one side), and C) the length of the body diagonal across the unit cell from opposite corners on opposite sides).Express your answers in picometers.

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Question 24

The two types of closest-packed lattices are

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Question 25

A tetrahedral hole in a crystal lattice is defined as

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Question 26

The hybridization of carbon in graphite is

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Question 27

Cesium chloride adopts a simple cubic lattice where the eight Cl^- ions lie at the corners of the cubic unit cell and the Cs⁺ ion lies in the center of the cube.If the edge length of the unit cell is approximately 412.3 pm and the ionic radius of Cl^- is about 181 pm, calculate an estimate of the ionic radius of Cs⁺.

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Question 28

GaAs and AlGaAs₂ are used in what type of semiconductor device?

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Question 29

Substances such as silicon dioxide that can have the same empirical formula but different crystal structures and properties are termed

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Question 30

In the Bragg equation, $\theta$ refers to the angle of___ or_ and 2 $\theta$ refers to the angle of____

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Question 31

Which of the following unit cells has the lowest packing efficiency?

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Question 32

Nickel aluminide, Ni₃Al, is sometimes used as a strengthening constituent in high-temperature nickel-base superalloys.It is approximately 13.3% aluminum (r = 143 pm) and 86.7% nickel (r = 124 pm).Ni₃Al is best classified as

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Question 33

Stainless steel is less susceptible to rusting than iron because

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Question 34

Suppose that approximately one-third of the octahedral holes in the fcc lattice of iron (Fe; r= 126 pm) is occupied by a carbon atom (C; r = 77 pm).Which of the following is its probable composition?

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Question 35

Which unit cell contains the most atoms?

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Question 36

Explain why a binary substitutional alloy tends to be harder than the pure host metal.

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Question 37

In the unit cell of sphalerite,

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Question 38

Aluminum is resistant to corrosion because of

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Question 39

For an alloy composed of two elements whose composition can be variable, if the radii of the two elements are approximately the same, the alloy is most likely to be a(n) alloy, while if the radii are significantly different, the alloy is most likely to be a(n) _alloy.

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Question 40

Showing 21 - 40 of 170

Exam 18: The Solid State a Particulate View

According to band theory, when the lower-energy ____band is separated from the higher-energy____band by a large band gap, the material will act as a(n)____ of electricity.

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

Just as visible light is diffracted by the finely spaced grooves on a compact disc (CD), electromagnetic radiation in the _______range has the appropriate wavelength to be diffracted by atoms and electron density in a crystalline lattice.

The two types of closest-packed lattices are

A tetrahedral hole in a crystal lattice is defined as

The hybridization of carbon in graphite is

GaAs and AlGaAs2 are used in what type of semiconductor device?

Substances such as silicon dioxide that can have the same empirical formula but different crystal structures and properties are termed

In the Bragg equation, θ\thetaθ refers to the angle of_____ or_____ and 2 θ\thetaθ refers to the angle of______

Which of the following unit cells has the lowest packing efficiency?

Nickel aluminide, Ni3Al, is sometimes used as a strengthening constituent in high-temperature nickel-base superalloys.It is approximately 13.3% aluminum (r = 143 pm) and 86.7% nickel (r = 124 pm).Ni3Al is best classified as

Stainless steel is less susceptible to rusting than iron because

Suppose that approximately one-third of the octahedral holes in the fcc lattice of iron (Fe; r= 126 pm) is occupied by a carbon atom (C; r = 77 pm).Which of the following is its probable composition?

Which unit cell contains the most atoms?

Explain why a binary substitutional alloy tends to be harder than the pure host metal.

In the unit cell of sphalerite,

Aluminum is resistant to corrosion because of

For an alloy composed of two elements whose composition can be variable, if the radii of the two elements are approximately the same, the alloy is most likely to be a(n) ____alloy, while if the radii are significantly different, the alloy is most likely to be a(n) _____alloy.

Matter and Energy an Atomic Perspective

Atoms, Ions, and Molecules the Building Blocks of Matter

Atomic Structure Explaining the Properties of Elements

Chemical Bonding Understanding Climate Change

Bonding Theories Explaining Molecular Geometry

Intermolecular Forces Attractions Between Particles

Stoichiometry Mass Relationships and Chemical Reactions

Aqueous Solutions Chemistry of the Hydrosphere

Thermochemistry Energy Changes in Chemical Reactions

Properties of Gases the Air We Breathe

Properties of Solutions Their Concentrations and Colligative Properties

Thermodynamics Why Chemical Reactions Happen

Chemical Kinetics Clearing the Air

Chemical Equilibrium Equal but Opposite Reaction Rates

Acid-Base Equilibria Proton Transfer in Biological Systems

Additional Aqueous Equilibria Chemistry and the Oceans

Electrochemistry the Quest for Clean Energy

Organic Chemistry Fuels, Pharmaceuticals, and Modern Materials

Biochemistry the Compounds of Life

Nuclear Chemistry the Risks and Benefits

The Main Group Elements Life and the Periodic Table

Transition Metals Biological and Medical Applications

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According to band theory, when the lower-energy band is separated from the higher-energyband by a large band gap, the material will act as a(n) of electricity.

GaAs and AlGaAs₂ are used in what type of semiconductor device?

In the Bragg equation, $\theta$ refers to the angle of___ or_ and 2 $\theta$ refers to the angle of____

Nickel aluminide, Ni₃Al, is sometimes used as a strengthening constituent in high-temperature nickel-base superalloys.It is approximately 13.3% aluminum (r = 143 pm) and 86.7% nickel (r = 124 pm).Ni₃Al is best classified as

For an alloy composed of two elements whose composition can be variable, if the radii of the two elements are approximately the same, the alloy is most likely to be a(n) alloy, while if the radii are significantly different, the alloy is most likely to be a(n) _alloy.