Lawrence Berkeley National Laboratory
Berkeley Lab: The Particle Adventure
Visit this site for an interactive tour of the atom and all aspects of particle physics. View the animations available with almost every description on this site. A great place for the fundamentals of particles and forces including a...
CK-12 Foundation
Ck 12: Physical Science: Elements
[Free Registration/Login may be required to access all resource tools.] Discusses elements and their different properties, the history of elements, and how atoms relate to elements.
TED Talks
Ted: Ted Ed: The 2400 Year Search for the Atom
How do we know what matter is made of? The quest for the atom has been a long one, beginning 2,400 years ago with the work of a Greek philosopher and later continued by a Quaker and a few Nobel Prize-winning scientists. Theresa Doud...
Other
American Institute of Physics: Marie Curie and Radioactivity
A very readable account of the discovery of radioactivity and its properties.