Question

Solids are classified into two types.

1. What are they? 

2. Give two examples. 

3. Give 3 features of them.

Answer 1

1. Crystalline and amorphous.

2. Crystalline – NaCl, KCl. Amorphous-Plastic, rubber.

3. 

Crystalline   Solids	Amorphous Solids
1. Sharp melting point	1. Melting point is in a range of temperature
2. Long range  order	2. Short range order
3. Anisotropic	3. Isotropic
4. Definite shape	4. Irregular shape