Wikimedia
Wikipedia: Materia
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.
Other
National Research Council: Elementary Particle Physics
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...
CK-12 Foundation
Ck 12: Chemistry: Atomic Nucleus
[Free Registration/Login may be required to access all resource tools.] Describes the modern concept of the atomic nucleus.
Soft Schools
Soft Schools: Subatomic Particles Quiz
Take this interactive, multiple-choice quiz over subatomic particles, then review your score and any missed questions at the end.
Science Struck
Science Struck: How Does Radioactive Decay Work?
Explains the processes of radioactive decay in primary and secondary modes.
Thomas Jefferson National Accelerator Facility
Jefferson Lab: Beta Decay
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.
New York University
New York University: Law of Conservation of Energy
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.
Sophia Learning
Sophia: Subatomic Particles: Lesson 3
This lesson will introduce the subatomic particles and explain where they are located and how they interact. It is 3 of 7 in the series titled "Subatomic Particles."
Sophia Learning
Sophia: Subatomic Particles: Lesson 4
This lesson will introduce the subatomic particles and explain where they are located and how they interact. It is 4 of 7 in the series titled "Subatomic Particles."
Sophia Learning
Sophia: Subatomic Particles: Lesson 6
This lesson will introduce the subatomic particles and explain where they are located and how they interact. It is 6 of 7 in the series titled "Subatomic Particles."
Sophia Learning
Sophia: Subatomic Particles: Lesson 7
This lesson will introduce the subatomic particles and explain where they are located and how they interact. It is 7 of 7 in the series titled "Subatomic Particles."
ClassFlow
Class Flow: Atomic Structure: Parts of the Atom
[Free Registration/Login Required] This flipchart defines the parts of the atom. It uses Activotes for assessment.
Lawrence Berkeley National Laboratory
Berkeley Lab: Basic Nuclear Science Information
Site provides the ABC's of nuclear science including radioactivity and gamma decay to fission and comic rays.