Chapter 4: This chapter covers the basics of atomic structure through eye-catching graphics and animations. Concepts covered include subatomic particles, atomic number, mass number and isotopes. Students see a simulation of J. J. Thomson’s experiments with cathode ray tubes. This product uses the interactive capabilities of a computer. The chapter has an embedded end-of-chapter quiz, uses graphics, animations, user interactivity or embedded video on almost all pages. This product is designed to provide bite-sized pieces of information in an effort to enhance the scientific literacy of our next generation, not to overwhelm them with sheer quantity of information. Chapter 4 section titles: Models of the Atom • Particles of the Atom • Structure of the Atom • Atomic Number • Mass Number • Isotopes • Determining Atomic Weights • Structure of the Atom Quiz. This product works both on a Macintosh or PC computer.