MTL 200 UPDATED ACTUAL Questions
and CORRECT Answers
Crystalline Material - CORRECT ANSWER✔✔- Atoms arranged in a repeating pattern over
large distances.
Lattice - CORRECT ANSWER✔✔- Three-dimensional array of points coinciding with atom
positions.
Unit Cell - CORRECT ANSWER✔✔- Smallest repeating unit of a lattice, basic building
block.
Polymorphism - CORRECT ANSWER✔✔- Presence of multiple crystal structures in a
chemical compound.
Allotropy - CORRECT ANSWER✔✔- Presence of multiple crystal structures in a chemical
element.
Crystallographic Directions - CORRECT ANSWER✔✔- Vectors indicating directions in a
crystal structure.
Crystallographic Planes - CORRECT ANSWER✔✔- Planes defined within a crystal
structure.
Linear Density - CORRECT ANSWER✔✔- Density of atoms along a specific direction in a
crystal.
Planar Density - CORRECT ANSWER✔✔- Density of atoms within a specific crystal plane.
Close-Packed Crystal Structures - CORRECT ANSWER✔✔- HCP: ABABAB stacking,
FCC: ABCABC stacking.
, Single Crystal - CORRECT ANSWER✔✔- Periodic atom arrangement without grain
boundaries.
Polycrystalline - CORRECT ANSWER✔✔- Multiple crystals with varying orientations.
Grain Boundary - CORRECT ANSWER✔✔- Boundary where atomic alignment differs in
polycrystalline materials.
Anisotropy - CORRECT ANSWER✔✔- Directional property variation in materials.
Isotropy - CORRECT ANSWER✔✔- Uniform property distribution in all directions.
X-ray Diffraction - CORRECT ANSWER✔✔- Analyzing crystal structures using x-ray
patterns, following Bragg's Law.
Bragg's Law - CORRECT ANSWER✔✔- Relates x-ray diffraction angles to crystal lattice
spacing.
Crystalline defect - CORRECT ANSWER✔✔- Lattice irregularities in solids
Vacancies - CORRECT ANSWER✔✔- Empty atom sites in a crystal lattice
Self-interstitials - CORRECT ANSWER✔✔- Atoms positioned in the interstitial spaces of a
crystal lattice
Equilibrium number of vacancies equation - CORRECT ANSWER✔✔- Ratio of vacancies
to total atom sites
Hume-Rothery rules - CORRECT ANSWER✔✔- Guidelines for solid solution formation
and CORRECT Answers
Crystalline Material - CORRECT ANSWER✔✔- Atoms arranged in a repeating pattern over
large distances.
Lattice - CORRECT ANSWER✔✔- Three-dimensional array of points coinciding with atom
positions.
Unit Cell - CORRECT ANSWER✔✔- Smallest repeating unit of a lattice, basic building
block.
Polymorphism - CORRECT ANSWER✔✔- Presence of multiple crystal structures in a
chemical compound.
Allotropy - CORRECT ANSWER✔✔- Presence of multiple crystal structures in a chemical
element.
Crystallographic Directions - CORRECT ANSWER✔✔- Vectors indicating directions in a
crystal structure.
Crystallographic Planes - CORRECT ANSWER✔✔- Planes defined within a crystal
structure.
Linear Density - CORRECT ANSWER✔✔- Density of atoms along a specific direction in a
crystal.
Planar Density - CORRECT ANSWER✔✔- Density of atoms within a specific crystal plane.
Close-Packed Crystal Structures - CORRECT ANSWER✔✔- HCP: ABABAB stacking,
FCC: ABCABC stacking.
, Single Crystal - CORRECT ANSWER✔✔- Periodic atom arrangement without grain
boundaries.
Polycrystalline - CORRECT ANSWER✔✔- Multiple crystals with varying orientations.
Grain Boundary - CORRECT ANSWER✔✔- Boundary where atomic alignment differs in
polycrystalline materials.
Anisotropy - CORRECT ANSWER✔✔- Directional property variation in materials.
Isotropy - CORRECT ANSWER✔✔- Uniform property distribution in all directions.
X-ray Diffraction - CORRECT ANSWER✔✔- Analyzing crystal structures using x-ray
patterns, following Bragg's Law.
Bragg's Law - CORRECT ANSWER✔✔- Relates x-ray diffraction angles to crystal lattice
spacing.
Crystalline defect - CORRECT ANSWER✔✔- Lattice irregularities in solids
Vacancies - CORRECT ANSWER✔✔- Empty atom sites in a crystal lattice
Self-interstitials - CORRECT ANSWER✔✔- Atoms positioned in the interstitial spaces of a
crystal lattice
Equilibrium number of vacancies equation - CORRECT ANSWER✔✔- Ratio of vacancies
to total atom sites
Hume-Rothery rules - CORRECT ANSWER✔✔- Guidelines for solid solution formation
