Every substance on earth is made of atoms, the building blocks of all matter. There are many different types of atoms, which are classified as elements .
Molecules join together to form all matter.
Different atoms bond together to form molecules . Molecules form mixtures and compounds . Mixtures are groups of molecules that can be separated by physical means. Compounds are groups of molecules, each of whom contains a definite specific arrangement, and can only be separated by chemical means. Every mineral type contains defined amounts of specific molecules in its structure.