structure of matter

Every bit of matter - wether solid, liquid of gas - is a SUBSTANCE or a mixture of substances.
After modules 01 - 04 you know atoms, elements, chemical bonds and nomenclature,
zo you can look at the matter and substances in a more chemical manner, and less in the fysical manner.

Now you are going to apply your knowledge on the microworld of atoms, ions and molecules.
You will understand more of matter.
We consider matter als everything that has mass and volume.