Why do amorphous solids not have a long range order in the arrangement of their particle

Explanation:

Amorphous solids are the substances in which atoms or molecules are arranged in a disorder manner. That is, molecules are randomly arranged to each other.

An amorphous solid have only small region where atoms are arranged in a definite order. This is known as short range order.

For example, rubber, glass, pitch etc are all amorphous solids.

Whereas a crystalline solid has atoms arranged in a definite or regular order.

This order is so regular that by knowing just any one site arrangement we can predict the arrangement of another site. This is known as long range order.

A crystalline solid possesses both long range and short range order. Whereas an amorphous solid possesses only short range order.

Hence, we can conclude that since there is only short range order present in an amorphous solid that is why amorphous solids not have a long range order in the arrangement of their particle.