PBS
Pbs Learning Media: Diamonds: The Science Behind the Sparkle
This illustrated essay from the NOVA Web site explains why the atomic structure of a diamond slows down light and produces a sparkle more brilliant than from any other colorless substance.
Khan Academy
Khan Academy: Discovery of the Electron and Nucleus
Learn about Thomson's cathode ray experiment and the plum pudding model and Rutherford's gold foil experiment.
Open Curriculum
Open Curriculum: The Atom
Learn about atoms and their properties of motion with this illustrated article.
Lawrence Berkeley National Laboratory
Berkeley Lab: Sub Nucleonic Structure and the Modern Picture of a Nucleus
A simple explanation of the structures theoretically found within protons and neutrons. The resource consists of pictures and links to additional resources.
Famous Scientists
Famous Scientists: Aage Bohr
Learn about the life of Aage Niels Bohr, and see how his work was pivotal in the development of the theory of the structure of the atomic nucleus.