Question 1

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 chocolateF) C) and E)
G) C) and D)

Question 2

Identify the shape for SiO4.

Accepted Answer

A)   tetrahedral
B)   trigonal bipyramidal
C)   trigonal planar
D)   octahedral
E)   trigonal pyramidalF) D) and E)
G) A) and B)

Question 3

Identify an element that is NOT in nonoxide ceramics.

Accepted Answer

A)   nitrogen
B)   silicon
C)   aluminum
D)   boron
E)   carbonF) A) and B)
G) A) and C)

Question 4

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 forcesF) D) and E)
G) A) and C)

Question 5

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.F) D) and E)
G) A) and D)

Question 6

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.F) C) and D)
G) A) and B)

Question 7

A common use of polyethylene is

Accepted Answer

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

Question 8

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.F) A) and B)
G) A) and C)

Question 9

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 3.Aluminum crystallizes in a face centered cubic structure with an edge length of 2   r. A)  143 pm B)  227 pm C)  96 pm D)  172 pm E)  193 pm" class="answers-bank-image d-inline" rel="preload" > r.

Accepted Answer

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

Question 10

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.F) None of the above
G) C) and D)

Question 11

A common use of polyurethane is

Accepted Answer

A)   tire cord.
B)   fishing line.
C)   foam cups.
D)   spray-on insulation.
E)   films.F) None of the above
G) A) and C)

Question 12

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

Accepted Answer

A)   80
B)   75
C)   85
D)   90
E)   70F) A) and B)
G) B) and C)

Question 13

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 absorptionF) All of the above
G) A) and C)

Question 14

Identify the element with the smallest band gap.

Accepted Answer

A)   lead
B)   silicon
C)   germanium
D)   carbon
E)   tinF) B) and D)
G) B) and C)

Question 15

Identify the element with the largest band gap.

Accepted Answer

A)   lead
B)   silicon
C)   germanium
D)   carbon
E)   tinF) C) and D)
G) A) and C)

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 = cE) A) and B)
F) None of the above

Question 17

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 forcesF) All of the above
G) B) and E)

Question 18

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 pmF) A) and B)
G) B) and E)

Question 19

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 efficiencyF) B) and D)
G) B) and E)

Question 20

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 pmF) B) and E)
G) A) and D)

Exam 12: Solids and Modern Materials

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

Correct AnswerverifiedShow Answer

Which of the following is considered an atomic solid?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A common use of polyurethane is

Correct AnswerverifiedShow Answer

Identify for the rhombohedral unit cell.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Identify the element with the largest band gap.

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

Identify the characteristics of a body-centered cubic cell.

Correct AnswerverifiedShow Answer

Define blooming with chocolate.

Correct AnswerverifiedShow Answer

Identify the shape for SiO4.

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

A common use of polyethylene is

Correct AnswerverifiedShow Answer

Identify the element with the smallest band gap.

Correct AnswerverifiedShow Answer

Identify an element that is NOT in nonoxide ceramics.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Identify the shape for SiO₄.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified