Visit this site for an interactive tour of the atom and all aspects of particle physics. View the animations available with almost every description on this site. A great place for the fundamentals of particles and forces including a...

The Nobel Physics Chairman made this speech when presenting the Prize to Chadwick. It clearly explains the importance and depth of Chadwick's work. Site by Nobel e-Museum.

The number of protons in the atom of an element determines its place in the Periodic Table. The number of electrons in an atom is the same as the number of protons. These electrons are arranged in shells or 'energy levels' around the...

Research with linear colliders may enormously benefit fields such as medicine, computing and the environment. Examples include medical proton therapy and the potential of being able to render nuclear waste harmless. A wonderful side...

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

This is a brief biography on the life and scientific work of Otto Stern, a physicist honored with the Nobel Prize in physics for his "development of the molecular ray method and his discovery of the magnetic moment of the proton."

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

This lesson focuses on the structure of atoms. All substances are made from atoms. Each atom is made of a nucleus - containing protons and neutrons - surrounded by electrons. It provides a link to an assessment.

Activity 1 in this module: What is the effect of changing the composition of an atom? Since all atoms contain protons, neutrons, and electrons, what makes one element different from another is examined.

ChemCenter, available from the American Chemical Society, provides chemistry news, reference sources and other public services.

Explains the basics of atomic structure, from simple definitions to information about quantum theory. Accurate and helpful basics whether or not you need the more advanced information.

This site provides a detailed overview of atoms. Content explores an atom's structure, as well as what ions are, how atoms bond, what compounds are (including how to name compounds), and what isotopes are.

Everythingin the universeis either matter or energy. All matter is made of combinations of about one hundred basic building blocks, the chemical elements on the periodic table. Going a step further and breaking these elements down to...

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...

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

In this interactive activity from ChemThink, students will take a closer look at atomic structure, properties, and behaviors. Includes background reading material and discussion questions.

Video explaining the process, risks, and benefits of radioactivity. [4:16] Followed by a short quiz and a list of additional resources to explore.

Take a look at the parts of an atom and learn about its properties.

Explore the concept of matter in this Spanish-language encyclopedia entry. This site features the properties of matter, the Law of Conservation of Matter, and other important features of matter.

A choice menu assignment where young scholars select between several extension activities that help understand the structure of the atom.

This activity serves as an introduction to chemistry, and can be used to help students draw a two dimensional image of the atom.

A detailed Wikipedia encyclopedia article on fuel cells explains what they are, the controversies in the use of hydrogen as a fuel, and practical problems. There is also a lengthy section on the five generally recognized types of fuel...

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.