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MTL 200 Questions and Correct Answers/ Latest Update / Already Graded

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Crystalline Material Ans: Atoms arranged in a repeating pattern over large distances. Lattice Ans: Three-dimensional array of points coinciding with atom positions. Unit Cell Ans: Smallest repeating unit of a lattice, basic building block. Polymorphism Ans: Presence of multiple crystal structures in a chemical compound. Allotropy Ans: Presence of multiple crystal structures in a chemical element. Page | 2 Crystallographic Directions Ans: Vectors indicating directions in a crystal structure. Crystallographic Planes Ans: Planes defined within a crystal structure. Linear Density Ans: Density of atoms along a specific direction in a crystal. Planar Density Ans: Density of atoms within a specific crystal plane. Close-Packed Crystal Structures Ans: HCP: ABABAB stacking, FCC: ABCABC stacking. Single Crystal Ans: Periodic atom arrangement without grain boundaries.

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Page |1


MTL 200 Questions and Correct Answers/
Latest Update / Already Graded
Crystalline Material

Ans: Atoms arranged in a repeating pattern over large
distances.


Lattice

Ans: Three-dimensional array of points coinciding with atom
positions.


Unit Cell

Ans: Smallest repeating unit of a lattice, basic building block.


Polymorphism

Ans: Presence of multiple crystal structures in a chemical
compound.


Allotropy

Ans: Presence of multiple crystal structures in a chemical
element.


All rights reserved © 2025/ 2026 |

, Page |2



Crystallographic Directions

Ans: Vectors indicating directions in a crystal structure.


Crystallographic Planes

Ans: Planes defined within a crystal structure.


Linear Density

Ans: Density of atoms along a specific direction in a crystal.


Planar Density

Ans: Density of atoms within a specific crystal plane.


Close-Packed Crystal Structures

Ans: HCP: ABABAB stacking, FCC: ABCABC stacking.


Single Crystal

Ans: Periodic atom arrangement without grain boundaries.




All rights reserved © 2025/ 2026 |

, Page |3

Polycrystalline

Ans: Multiple crystals with varying orientations.


Grain Boundary

Ans: Boundary where atomic alignment differs in
polycrystalline materials.


Anisotropy

Ans: Directional property variation in materials.


Isotropy

Ans: Uniform property distribution in all directions.


X-ray Diffraction

Ans: Analyzing crystal structures using x-ray patterns,
following Bragg's Law.


Bragg's Law

Ans: Relates x-ray diffraction angles to crystal lattice spacing.



All rights reserved © 2025/ 2026 |

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