ECE401 - Q1 FINALS

What is the basic structural unit of a crystal structure?

• Atom

• Molecule

• Unit cell

• Lattice

Which of the following is NOT a common crystal structure found in metals?

• Face-centered cubic

• Body-centered cubic

• Hexagonal close-packed

• Simple cubic

In a face-centered cubic (FCC) crystal structure, how many atoms are there per unit cell?

• 2

• 4

• 6

• 8

What is the coordination number for the face-centered cubic (FCC) crystal structure?

• 6

• 8

• 12

• 14

Which metals typically have a face-centered cubic (FCC) crystal structure?

• Copper, aluminum, silver, gold

• Chromium, iron, tungsten

• Cadmium, magnesium, titanium

• Zinc, lead, tin

What is the atomic packing factor (APF) for the face-centered cubic (FCC) structure?

• 0.52

• 0.68

• 0.74

• 0.82

In a body-centered cubic (BCC) crystal structure, how many atoms are there per unit cell?

• 1

• 2

• 4

• 8

What is the coordination number for the body-centered cubic (BCC) crystal structure?

• 6

• 8

• 12

• 14

Which metals typically have a body-centered cubic (BCC) crystal structure?

• Copper, aluminum, silver, gold

• Chromium, iron, tungsten

• Cadmium, magnesium, titanium

• Zinc, lead, tin

What is the atomic packing factor (APF) for the body-centered cubic (BCC) structure?

• 0.52

• 0.68

• 0.74

• 0.82