The wavefunction is a complete description of the system.

Our first postulate of quantum mechanics is that the wavefunction is a complete description of the system. This is great in principle, but what are the practical details? How do we use the wavefunction to produce information that is useful to chemists? The difference between average (or expectation) values and the probability density are explored. We consider the radial distribution of electron density in 1s and 3s orbitals using Mathematica.

MP3 podcast
screencast
Mathematica notebook