Term

pure substances

Definition

Substances with a definite chemical composition and physical and chemical properties. They are homogenous.

Term

mixtures [ impure substances]

Definition

They are made of 2 or more elements, compounds, or both in any proportion. They do not have any definite properties and instead retain the properties of their components. They can be either homogeneous or heterogeneous.

Term

element

Definition

It is a pure substance that cannot be converted to anything simpler than itself by any physical or chemical process. They are made of the same types of atoms.