The substance that looks the same as Has boiling point and melting point fixed. There is a constant chemical composition is the same in every State. Which can be divided into 2 types:
Substances that are homogeneous. Constant boiling point and melting point A constant chemical composition and the same in every state. Which can be divided into two types.
The style is homogeneous. The melting and boiling points constant. The chemical composition and the same in every state constant which can be divided into 2 type.