Solids and Unit Cells

What type of material is this one?

• Crystal

• Amorphous

• Covalent Crystal

• Ionic Crystal

Tags

NGSS.HS-PS1-3

How do we call the macroscopic structure of a crystalline solid?

• Crystal Structure

• Lattice

• Unit Cell

Is NOT a crystal system

• Cubic

• Hexagonal

• Rotorombic

• Monoclinic

Is the most common crystal system for metals

• Tetragonal

• Trigonal

• Monoclinic

• Cubic

How many complete atoms can we find on the BCC (body centered cubic) structure?

• 1

• 2

• 3

• 4

Obtain the volume of the BCC crystal structure in term of it the atomic radius.

• 2R³

• 16R³√2

• (4R/√3)³

• (4R)³

Molybdenum (Mo) has a BCC crystal structure, an atomic radius of 0.1363 nm. Compute its theoretical volume.

• 3.1187x10^-23 cm³

• 1.5594x10^-23 cm³

• 3.1187x10^-23 m³

• 1.5594x10^-23 m³

Molybdenum (Mo) has a BCC crystal structure, an atomic radius of 0.1363 nm, and an atomic

weight of 95.94 g/mol. Compute its theoretical density.

• 5.1083 g/cm³

• 10.2165 g/cm³

• 20.4331 g/cm³

• 10.2165 kg/m³

What is the coordination number in the FCC structure?

• 24

• 12

• 8

• 4

Find the coordinates, e.g. (0 0 0), for point 4.

• (0 1 0)

• (1 1 0)

• (0 1 1)

• (0 0 0)