Chemistry
Chemistry is the study of atoms and how they interact with one another.

These atoms, which make up all the matter we see, are composed of
three main subatomic particles.  They are called the proton, neutron and
electron.
Periodic Table of Elements
The periodic table of elements displays all known elements.  
This link will take you to the Los Alamos Laboratories website.

A list of elements in alphabetic order can be found by clicking
on the following link:
Table of Elements Alphabetic
Element of the Day
A great daily opener for teachers.
Element Quiz: Proton Don
Web-Science.net
A Middle School Level Website