Khan Academy
Khan Academy: Isotopes and Mass Spectrometry
Tutorial explains isotopes, atomic weight and how isotopes can be detected using mass spectrometry. Examples are given.
Department of Defense
Do Dea: Chemistry Review
Review atoms with this slideshow. You can choose to listen to the review or read the accompanying text. At the end, play the game to review the basics of atoms that you have just learned about. You may play the game as many times as...
Vision Learning
Visionlearning: Atomic Theory and Structure: The Mole: Its History and Use
An introduction to the mole, a unit of measurement that quantifies atoms and molecules.