Classification of Matter

Distinguish between an atom and a molecule. Give an example of elements existing as atoms and molecules. 

Explain the classification of matter based on its molecular composition with suitable examples. 

A pure substance is homogeneous in nature.

Arrange the following examples in the order of matter, compound, element and mixture. 

($1$) Dilute acid 

($2$) Argon 

($3$) Water 

($4$) Ball 

Give schematic representation of classification of matter based on its composition.

Which among the following is a pure substance? 

The smallest particle of an element which may or may not have independent existence is called a/ an: