Chemistry > Solid State > 9.0 Properties of Solids
Solid State
1.0 Classification of Solids
2.0 Types of Lattice
3.0 Calculation of number of particles in a Unit Cell
4.0 Close Packing in Crystals
5.0 Calculation of Spaces occupied i.e., Packing Fraction
6.0 Calculation of density of a cubic crystal from its edge
7.0 Classification of Ionic Structures
8.0 Imperfection in Solids
9.0 Properties of Solids
10.0 Silicates
9.1 Amorphous Solids
Solids, which do not have an ordered arrangement of their constituent atoms or ions but have a disordered or random arrangement are called amorphous solids e.g. ordinary glass.
Properties of Amorphous Solids
$a)$ Short range order: Amorphous solids have a short range order like liquids i.e. the order does not extend to large three dimensional network.
$b)$ No sharp melting point: These solids melt over a range of temperature. This property is used in moulding and giving desired shape to the articles of glass.
$c)$ Conversion into crystalline form on heating: Amorphous solids, when heated and cooled slowly, become crystalline at certain temperature.
Use of Amorphous Solids
$a)$ Amorphous solids, in the form of inorganic glasses, find application in construction, house?ware, laboratory ware etc.
$b)$ These solids are used in making tyres, shoe soles etc., in the form of rubber.
$c)$ Large number of plastics are being used in articles of daily use.
$d)$ These are used in photo voltaic cells (for converting sunlight into electricity).
