[Free Registration/Login may be required to access all resource tools.] Students learn about the important discoveries of subatomic particles, and how they led to our current understanding of the atom.

Acting as an overview from the General Chemistry Virtual Textbook, this site explores Lewis acids and bases with specific attention directed toward protons and electron-pairs. Other topics covered include proton-transfer reactions...

Learners will use bags of beads with known quantities of electrons, neutrons and protons to identify the element that they represent.

An interactive website where students learn about the basics of an atom, periodic tables organization, and the structure and properties of matter. Module includes an introduction and five lessons that are followed by a quiz and an...

This webpage from the Florida State University offers an applet with succeeding images, each "10 times bigger or smaller than the one preceding or following it," as a demonstration of exponential notation.

Explains the processes of radioactive decay in primary and secondary modes.

Site presents a straightforward presentation of Rutherford's work concerning the Law of Energy Conservation. Provides an adequate summary of early science on the nucleus, and includes much needed illustrations.

Site provides the ABC's of nuclear science including radioactivity and gamma decay to fission and comic rays.

Young scholars create models of atoms then compare the various aspects of the atoms including; relative size, charge, positions of subatomic particles, and identity of the atom based on proton, neutron, and electrons with the class.