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SOLIDS
INTRODUCTION:
Solids are those substances which are rigid,
hard, have definite shape and definite volume.
The atoms, ions and molecules that makeup a
solid are closely packed. They are held together
by strong cohesive forces. The constituent
atoms, ions or molecules of solids cannot move
at random. There exists a well-ordered
arrangement in solids.
TYPES OF SOLIDS:
Solids can be classified on the basis of the
regular arrangements of constituent atoms, ions
or molecules. There are two types of solids in
this respect.
1). CRYSTALLINE SOLIDS:
Those solids in which atoms, ions or
molecules are arranged in a definite three-
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dimensional pattern are called crystalline solids.
This recurring regular geometrical pattern of
structure extends three dimensionally.
2) AMORPHOUS SOLIDS:
All solids are not crystalline. The word
amorphous means shapeless. Amorphous
substances are those whose constituent atoms,
ions or molecules do not possess a regular
orderly arrangement.
The best examples are glass, plastics, rubber,
etc.

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SOLIDS INTRODUCTION: Solids are those substances which are rigid, hard, have definite shape and definite volume. The atoms, ions and molecules that makeup a solid are closely packed. They are held together by strong cohesive forces. The constituent atoms, ions or molecules of solids cannot move at random. There exists a well-ordered arrangement in solids. TYPES OF SOLIDS: Solids can be classified on the basis of the regular arrangements of constituent atoms, ions or molecules. There are two types of solids in this respect. 1). CRYSTALLINE SOLIDS: Those solids in which atoms, ions or molecules are arranged in a definite three- dimensional pattern are called crystalline solids. This recurring regular geometrical pattern of structure extends three dimensionally. 2) AMORPHOUS SOLIDS: All solids are not crystalline. The word amorphous means shapeless. Amorphous substances are those whose constituent atoms, ions or molecules do not possess a regular orderly arrangement. The best examples are glass, plastics, rubber, etc. Name: Description: ...
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