Distinguish between crystalline solids and amorphous solids. Give examples.

Distinguish between crystalline solids and amorphous solids
PropertyCrystalline solidsAmorphous solids
1.ShapeThey have definite characteristic geometrical shape due to the orderly regular long range arrangement of constituent particles.They have irregular shape and lack characteristic geometrical shape due to the short range orderly arrangement of constituent particles.
2.Melting pointThey have sharp and characteristic melting point.They do not have sharp melting point. They gradually soften over a range of temperature.
3.Cleavage propertWhen cut with a sharp edged tool, they split into two pieces and the newly generated surfaces are plain and smooth.When cut with a sharp edged tool, they cut into two pieces with irregular surfaces.
4.Heat of fusionThey have a definite and characteristic heat of fusion.They do not have definite heat of fusion.
5.AnisotropyThey are anisotropic, i.e., have different physical properties in different directionThey are isotropic, i.e., have same physical properties in all directions.
6.NatureThey are true solidsThey are pseudo solids or super cooled liquids.
7.Order in arrangement of constituent particlesThey have long range order.They have only short range order
eg.Copper, silver, iron, zinc sulphide, common salt, potassium nitrate, etcGlass, rubber, plastics, etc

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