This lesson explains what is represented by the atomic mass, and how it varies from one element to the next. It is 3 of 4 in the series titled "Atomic Mass."

This lesson explains what is represented by the atomic mass, and how it varies from one element to the next. Module includes a slideshow and a quiz.

This lesson explains what is represented by the atomic mass, and how it varies from one element to the next. It is 1 of 4 in the series titled "Atomic Mass."

This lesson explains what is represented by the atomic number, and how it varies from one element to the next. It is 3 of 7 in the series titled "Atomic Number."

This lesson explains what is represented by the atomic number, and how it varies from one element to the next. It is 6 of 7 in the series titled "Atomic Number."

This lesson explains what is represented by the atomic mass, and how it varies from one element to the next. It is 2 of 4 in the series titled "Atomic Mass."

This lesson explains what is represented by the atomic number, and how it varies from one element to the next. It is 5 of 7 in the series titled "Atomic Number."

[Free Registration/Login Required] This flipchart was converted from Power Point and is used to introduce the history and concept of the Atom.

Dutch version of the well-known "Particle Adventure" physics website that teaches students about atoms, mass, particle physics, and quantum physics. The site discusses theories related to physics and provides other links related to the...

Learn the fundamentals of particles and forces with this site. Explore the paths that explain matter in the universe.

Identify the basic structure of atoms, the building blocks for all matter.

This site from Jefferson Lab provides a description of beta decay along with two helpful formula examples. Several links are provided throughout this page for additional information on related subjects.

[Free Registration/Login Required] This flipchart defines the parts of the atom. It uses Activotes for assessment.

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!

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

Students 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.

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...

Students explore the periodic table and learn the basic information given for elements: the name, symbol, atomic number, and atomic mass for each element.

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...

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.

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.

The Committee on Elementary-Particle Physics, part of the U.S. National Research Council, presents this massive report on particle physics. It's a definitive document. Surprisingly readable, totally detailed. Start with the Table of...

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.