Amount of molecules present in the substance
Explanation:
In general state of matter is classified into three types based on the amount of molecules present in the matter. They are widely classified as
SOLID
In solid the molecules are tightly packed without any free space to move inside. Therefore Solids have strong Inter-Molecular Force of attraction and have definite shape and volume.
LIQUID
In Liquid the molecules are not tightly packed. So that molecules move freely inside the matter. Therefore Liquids have Weaker Inter-Molecular Force of attraction and have no definite shape and no definite volume.
GAS
In Gas the molecules are loosely packed with more free space to move inside. Therefore Gas have the weakest Inter-Molecular Force of attraction and don't have definite shape and definite volume.