Discovery of the Electron - Experiments by J.J. Thomson in 1897 led to a look inside the atom and the discovery of a fundamental building block of matter.
How Atoms Work - HowStuffWorks - Article explaining what atoms are, how they are structured, and what they're made up of with diagrams and animations.
Single-Configuration Radial Wavefunction Calculator - HTML version of Robert Cowan's atomic structure application package that calculates single-configuration radial wavefunctions for a spherically symmetrized atom via approximations to the Hartree-Fock method.
You Try It: Atom Builder - Science Odyssey project that lets users build a carbon atom particle by particle.
