This page is an exercise in relating the number of protons, electrons, and neutrons for an atom or monoatomic ion.

Acting as an overview from the General Chemistry Virtual Textbook, this site explores acids and bases and various topics connected to them, including electron pairs, proton donors, proton acceptors, acid-base reactions, and more.

This animation discusses electrons and the properties of electrons in a storybook format featuring hairy monsters, strange rocks, and fun animations.

Six middle school chemistry lessons about the periodic table and bonding complete with handouts and animations.

Build an atom out of protons, neutrons, and electrons, and see how the element, charge, and mass change. Then play a game to test how the ideas work!

Explore the particles that make up atoms: protons, electrons, and electrons.

A video and a short quiz on the parts of an atom, the periodic table, and molecules.

Explore how changing the numbers of protons, neutrons, and electrons affect the type of atom.

This Nobel website on the life and scientific work of Robert A. Millikan includes a biography, images, and internet resources for further reading and research. Also included are the 1923 "Presentation Speech" which praised Millikan's...

[Free Registration/Login Required] Students explore real numbers through electrons and protons. Click challenge me to answer practice questions and click learn more to complete a learning module on real numbers.

[Free Registration/Login may be required to access all resource tools.] Describes research on the proton and the determination of the weight of proton and electron.

In this online biology textbook, learn about atoms and molecules as they relate to life. Find out about topics such as electrons and energy, chemical bonding, and chemical reactions.

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.

This unit covers introductory concepts of mixtures and solutions. Students think about how mixtures and solutions, and atoms and molecules can influence new technologies developed by engineers. The first lesson explores the fundamentals...

[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.

Brief explanations of how to determine how many protons, neutrons, and electrons are in an element.

An interesting and useful tool to practice recognition/calculation of atomic number, mass, and number of neutrons, electrons, etc. Can be used with all elements.

This lesson will explain that electrons are negatively charged particles with negligible mass and are found in pairs in orbitals surrounding the nucleus of an atom. It is 3 of 3 in the series titled "Subatomic Particles: The Electron."

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.

Trace the history of the discovery of protons and neutrons in this informative site.

Investigate the forces of electrons and protons in this experiment with electrostatic charges.

[Free Registration/Login Required] Manipulate the electrons and protons to explore metallic bonding. Then answer a self-correcting concept question.

This is 21-question multiple choice quiz over chemical bonds was written for a 7th-grade science class.