Solids Flashcards
Solids with particles that are in highly ordered arrangement.
Crystalline Solids
Solids which there are no particular order in the arrangement of particles.
Amorphous Solids
_____ solids have definite geometric shape.
Crystalline
_____ solids have definite melting point.
Crystalline
_____ solids have definite heat of fusion.
Crystalline
_____ solids have cleavage property.
Crystalline
_____ solids are anisotropic in nature.
Crystalline
_____ solids are true solids.
Crystalline
_____ solids have long range order in arrangement of particles.
Crystalline
_____ solids have irregular shape.
Amorphous
_____ solids gradually soften over a range of temperature.
Amorphous
_____ solids do not have definite heat of fusion.
Amorphous
_____ solids do not have cleavage property.
Amorphous
_____ solids are isotropic in nature.
Amorphous
_____ solids are pseudo solids or super cooled liquid.
Amorphous
_____ solids have short range order in arrangement of particles.
Amorphous
Repeating pattern of arrangement are called
the _____.
Unit Cell
They are the basic structural unit of crystal.
Unit Cell
_____ are when particles in unit cell are present only at the corners.
Primitive Unit Cell
_____ are when particles are present at the corners as well as other parts of the unit cell.
Centered Unit Cell
3 types of centered unit cell are _____ , _____ , and _____.
Body-Centered Cell, Face-Centered Cell, End-Centered Cell
Same compound occurring in more than
one crystal structure is called _____.
Polymorphism
Polymorphism depends on both the _____ and the _____.
Temperature, External Pressure
Polymorphism in elemental solids are _____.
Allotropy
_____ lattices allow the maximum amount of interaction between atoms.
Close-Packed
In ionic crystals, ions pack themselves so as to maximize the _____ and minimize _____ between the ions.
Attractions, Repulsions
Primitive cells have __ atom/s per cell, and are shared between __ cells.
1, 8
Body-centered cells have __ atom/s per cell, and are shared between __ cells.
2, 1
Face-centered cells have __ atom/s per cell, and are shared between __ cells.
4, 2
End-centered cells have __ atom/s per cell, and are shared between __ cells.
2, 2
Coordination number of primitive cells.
6
Coordination number of body-centered cells.
8
Coordination number of face-centered cells.
12
Formula for theoretical density.
P = (no. of Atoms per unit cell * Atomic Weigh) / (Volume of unit cell * 6.022 x 10^23)
Volume occupied by primitive cells.
52%
Volume occupied by body-centered cells.
68%
Volume occupied by face-centered cells.
74%
Formula for the volume of simple cubic cell.
a^3; a = 2r
Formula for the volume of face-centered cubic cell.
a^3; a = 2r√2
Formula for the volume of body-centered cubic cell.
a^3; a = 4r/√3
Diamond, quartz, and salt are examples of _____ solids.
Crystalline
Glass, rubber, and plastic are examples of _____ solids.
Amorphous
