M. Molecules and Elements

M can code for chemicals in general.

We begin by classifying chemical elements and allotropes:

ME. Chemical Elements

MA. Allotropes

And then types of chemical element:

MT. Types of Elements

MG. Groups of Elements

MP. Periods of Elements

We then move on to molecules:

MM. Molecules

Several types of molecules are discussed in MM. Molecules, and others in

MD. Descriptive Chemical Compounds

MI. Isomers

MS. Molecular Structure Molecules can be distinguished by the type of structure.

MB. Chemical Bonds Molecules can be distinguished by the type of bonds.

Given their importance in human life we can afford special treatment to MY. Polymers

Molecules can in turn be combined in many ways:

MMΣ Compounds Contain only one type of molecule. We thus distinguish individual molecules from aggregates of these.

MX. Mixtures

MC. Crystal Structures