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Question

What are amorphous and crystalline solids??


Solution

Amorphus solids refer to solid materials that do not exhibit any regular and definite arrangement of atoms and molecules in their crystal structure. 
 

A crystal or crystalline solid is a solid material whose constituent atoms, molecules, or ions are arranged in an orderly, repeating pattern extending in all three spatial dimensions.

 

More details

 

Amorphous solids

Crystalline solids

1

Have irregular shape

1

Have definite characteristic geometrical shape

2

Have only short-range order in the arrangement of constituent particles

2

Have long-range order in the arrangement of constituent particles

3

Gradually soften over a range of temperature

3

Have sharp and characteristic melting point

4

When cut with a sharp-edged tool, they cut into two pieces with irregular shapes

4

When cut with a sharp-edged tool, they split into two pieces with plain and smooth newly generated surfaces.

5

Do not have definite heat of fusion

5

Have definite and characteristic heat of fusion

6

Isotropic in nature

6

Anisotropic in nature

7

Pseudo solids or super-cooled liquids

7

True solids

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