Crystals Lesson

Multiple Choice

Which consists of carbon atoms?

• graphite
• diamond
• fullerene
• all of these

Multiple Choice

Define the term allotropes

• Atoms with same proton number but different number of neutrons
• Atoms with same proton number but different mass number
• Atoms in different arrangement in structure
• Atoms in different arrangement and different physical form

Multiple Choice

What state of matter is X?

• solid 
• liquid
• gas
• supercritical fluid

Multiple Choice

What is point A?

• triple point
• critical point
• equilibrium point
• normal melting point

Multiple Choice

Which statement is true for carbon dioxide at -60 °C?

• All three phases are possible.
• It can exist as a solid or a gas, depending on pressure.
• It is a solid.
• With enough pressure it can be melted.

Multiple Choice

Define the following term: Super-saturated Solution

• a solution that contains the maximum amount    of dissolved solute that can normally dissolve at a given temperature

• a solution that contains more solute than can be dissolved properly

• a solution in which more solute could be added

Multiple Choice

Grain boundary is a

• point defect
• surface defect
• line defect
• none

Multiple Choice

What is the name of this unit cell?

• simple cubic

• body-centered cubic

• face-centered cubic

Multiple Choice

This is an example of a _____ ________ __________ unit cell.

• simple cubic

• face-centered cubic

• body-centered cubic

Multiple Choice

This image represents a ______________ unit cell.

• simple cubic

• face-centered cubic

• body-centered cubic

Multiple Choice

Which crystal structure does the picture show?

• BBC (British Broadcasting Company)

• FCC (Face-Centered Cubic)

• SC (Simple Cubic)

• BCC (Body Center Cubic)

Multiple Choice

Which crystal structure does the picture show?

• BBC (British Broadcasting Company)

• BCC (Body Center Cubic)

• SC (Simple Cubic)

• FCC (Face-Centered Cubic)

Multiple Choice

what is the percentage of emptiness in the Simple Cubic form?

• 48%

• 32%

• 26%

• 56%

Multiple Choice

What is the percentage of emptiness in the Body Center Cubic form?

• 70%

• 50%

• 32%

• 63%

Multiple Choice

What is the percentage of emptiness in the Face Centered Cubic form?

• 43%

• 29%

• 15%

• 26%

Multiple Choice

Which crystal structure does the picture show?

• FCC (Face Center Cubic)

• BCC ( Body Center Cubic)

• BBC (British Broadcasting Company)

• SC (Simple Cubic)

Multiple Choice

Which of the given cubic structure has the highest packing factor

• FCC
• BCC
• SC
• none