Chemistry Made Simple : Composition of the Matter

 Overall , matter can be divided into two general categories :

Distinct Substance and Mixtures.

Distinct Substance :

In this substance,the smallest particle retains the property of the substance.

Element :

This is a disinct substance that is made of only one kind of atom.

Atom:

These are building blocks of matter that cannot be easily created nor destroyed.

Compound:

If two or more kinds of atoms join together in a definite grouping,this distinct substance is called a compound.