University of Colorado: Physics 2000: Elements as Atoms: Electron Clouds and Energy Levels

Each electron has a set of quantum numbers that specify it's location, orbital, and energy in a unique manner.

The Pauli Exclusion Principle shows how electrons fill atomic orbitals. Includes biographical information on Wolfgang Pauli.

Tired of blowing up countless balloons to illustrate orbital shapes around an atom? Give your lungs a break and use an interactive instead! Learners observe s, p, d, and f orbitals through the first four energy levels using hydrogen as a...

Several pages from an excellent site which describe the science of spectroscopy. The unique atomic emission (and absorption) line spectrum of elements are illustrated and explained. Includes a Java applet depicting the quantum energy...

This site describes the energy levels of atoms.

Learn about physics by having fun with the interactive Java applets at this site.

From the Physics 2000 site, this page exemplifies their usual superb discussion of the concepts of heat, temperature, and absolute zero. Using an entertaining series of cartoon characters, the page gives a very understandable discussion...

A physics course web page that features a Java applet in which visitors can observe the waveform resulting from the interference of two waves. The amplitude and wavelength of the interfering waves can be altered and the outcome observed.

Using a student-teacher dialogue format, this page discusses the nature of light as an electromagnetic wave and the electromagnetic spectrum.

A basic explanation of spin and how it relates to electrons and quantum numbers.