question_answer

      Distinguish between metals and non-metals.

Answer:

                                 

Metals	Non-metals
1. They have lustre (sheen).	1. They are non-lustrous (dull).
2. They are malleable and ductile.	2. They are neither malleable nor ductile.
3. They have high density and high melting and boiling points.	3. They have low density and low melting and boiling points .
4. Except mercury and gallium, all other metals are solid at room temperature.	4 .Non-metals may exist in solid, liquid or gaseous states at room temperature.
5. They are sonorous.	5. They are not sonorous .
6. They are good conductors of heat.	6. They are poor conductors of heat and electricity .
7. They are generally hard (except sodium and potassium).	7. Non-metals are generally soft (except diamond).
8. They have high tensile strength.	8. They have low tensile strength.