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California State University
Csudh Project for Chemistry: Protons, Electrons, and Neutrons
This page is an exercise in relating the number of protons, electrons, and neutrons for an atom or monoatomic ion.
American Chemical Society
Middle School Chemistry: Protons, Neutrons, and Electrons
Explore the particles that make up atoms: protons, electrons, and electrons.
American Chemical Society
Middle School Chemistry: Protons, Neutrons, and Electrons
Investigate why a charged object is attracted or repelled by another charged object. Explore the concept that the attraction between positive protons and negative electrons holds an atom together.
Other
Nuclear Twin: The Discovery of the Proton and Neutron
Trace the history of the discovery of protons and neutrons in this informative site.