There are two classes of properties :
1. Physical properties
2. Chemical properties
Physical properties: matter can exist in three different states.
1. solid state - rigid, with definite shape.
2. liquid state - possesses the property of flowing to take the shape of its container.
3. gaseous state - takes both shape and volume of its container. gases are readily compressible and capable of infinite expansion.
note. Physical properties can be observed and measured without changing the identity of the substance.
Chemical properties: cannot be observed and measured only by changing the identity of the substances.
Note: chemical properties describe a substance's ability to undergo chemical change.
