WorksheetsCrystal Physics basic terms
Total questions: 20
Worksheet time: 10mins
Amorphous solids have _______ structure.
Dendritic
Regular
Irregular
Linear
What is a crystal?
Its a solid substance with periodic arrangement of atoms
its a liquid substance
its a solid substance with random arrangement of atoms
its a gas
Define - unit cell
smallest volume from which the entire crystal is built on by irregular repetition in 3 dimensions.
volume from which the entire crystal is built on by reverse repetition in 3 dimensions.
largest volume from which the entire crystal is built on by translational repetition in 3 dimensions.
smallest volume from which the entire crystal is built on by translational repetition in 3 dimensions.
An amorphous material have
Short range of order
Indefinite melting point
Isotropic nature
All the above
The total number of crystal system is
5
8
7
4
An example of non- crystalline material
Plastic
Graphite
Gold
NaCl
None of the above
What is crystallography?
Study of cells
Study of earth
Study of oceans
Study of crystals
What is a grain boundary?
Site where 5 crystals meet
Site where 9 crystals meet
Site where 2 crystals meet
Site where 15 crystals meet
what do you understand by term Lattice Parameters?
three edges of unit cell
three inter axial angles of unit cell
three edges and inter-axial angles
three Dimensional cube
Unit Cell can be represented as parallelopiped in 2D and Parallelogram in 3D
True
False
None of the above
All of the above
Crystal ?
three dimensional arrangement of atoms
it define physical object
it help to define the physical properties such as weight, density
All of the above
Short Range Order observed in _________________?
Crystalline Solids
Amorphous Solids
sometimes in crystalline and Amorphous too
A regular, repeating arrangement of atoms is ...
amorphous
a crystal
a compound
impossible to break down
Which of the following is a way that crystals can form in nature?
When liquids cool and start to harden.
When magma cools.
When water evaporates from a mixture.
All of the above.
Smallest repeating unit of crystal lattice
Lattice site
Unit cell
Crystal lattice
Lattice point
Example for crystalline solid
Glass
Quartz
Plastic
Rubber
Crystalline solids are
Isotropic
Allotropic
Anisotropic
Isomorphic
Which of the following statements about lattices and unit cells is correct?
A unit cell contains a whole number of complete molecules
Lattice points are chosen to lie on atoms.
Lattice points all have identical surroundings
Unit cells are constructed by connecting adjacent lattice points to give the largest possible repeat unit.
Which of the following is a property of non-metallic crystals?
Highly ductile
Less brittle
FCC structure
Low electrical conductivity
A unit assembly of atoms (or) molecules (ie., one or more atoms (or) molecules) identical in composition, arrangement and orientation is called
Basis or Motif
Lattice
Crystal
Non-crystalline
