CK-12 Foundation
Ck 12: Physical Science: Isotopes
[Free Registration/Login may be required to access all resource tools.] Definition of isotopes, how they are named and their stability.
Physics Aviary
Physics Aviary: Practice Problems: Activity of an Isotope
Determine the activity of a radioactive sample by measuring the counts per minute that are detected by a sensor.
BBC
Bbc: Gcse Bitesize: Radioactive Emissions
This lesson focuses on radioactive emissions including radioactive decay, half-life, using half-life, how to calculate net decline, a table showing how the count rate of an isotope might change over time, and a link to a test.
Science Education Resource Center at Carleton College
Serc: Radioactive Dating: Looking at Half Lives Using M&ms
In this activity, young scholars gain a better understanding of radioactive dating and half-lives by using M&Ms to demonstrate the idea of radioactive decay. They will be able to see how scientists can determine the age of rocks by...
Idaho State University
Radioactivity in Nature
Interesting information including: average annual dosage, radioactivity in space, in the human body, and in the oceans.
CK-12 Foundation
Ck 12: The Nucleus and Isotopes
[Free Registration/Login may be required to access all resource tools.] In this lesson, students learn about the particles in an atomic nucleus, isotopes, and nuclear forces.
Other
American Institute of Physics: Marie Curie and Radioactivity
A very readable account of the discovery of radioactivity and its properties.
PBS
Pbs Teachers:nordic Sagas: Radioactive Reindeer
Demonstrate how soil absorbs radioactivity by simulating the absorption of the radioactive isotope from the Chernobyl disaster into the lichen of Scandinavia. Use a chart to figure out the half-life of the isotope.
Science Education Resource Center at Carleton College
Serc: Radioactive Decay Calculator
Young scholars will use this online Radioactive Decay Calculator to compute radioactive decay, timed decay, and timed solid disposal for a databank containing 116 isotopes. This calculator also features University of British Columbia...
Lawrence Berkeley National Laboratory
Berkeley Lab: Neutron Activation Analysis
A simple explanation of neutron activation of some natural elements in order to create a radioactive nucleus.
Lawrence Berkeley National Laboratory
Berkeley Lab: Radioactive Dating
This site provides an overview of radioactive dating, a process used to determine the age of rocks and other materials.
Khan Academy
Khan Academy: Understanding the Properties of Radioactive Tracers
Read the passage and study the graphic to complete the five-question quiz about the properties of radioactive tracers.
Ducksters
Ducksters: Chemistry for Kids: Isotopes
Study the science of isotopes in chemistry including naming isotopes, hydrogen, examples, fun facts, unstable, and stable on this site.
CK-12 Foundation
Ck 12: Earth Science: Radioactive Decay as a Measure of Age Study Guide
[Free Registration/Login may be required to access all resource tools.] Summarizes the key points about how radioactive particles decay. Includes a few questions to check for understanding.
Utah Education Network
Uen: Isotopic Dating Activity
Students will do research relating half-life and the age of radioactive substances on interesting topics.
Lawrence Berkeley National Laboratory
Berkeley Lab: Radioactivity in Nature
This entry provides a summary of radioactivity in nature and the decay chain.
Chem4kids
Chem4 Kids: Atoms: Neutrons
Students will find an explanation of the neutron particle located inside the atom's nucleus. Website also defines isotopes and the process of radioactive decay.
CK-12 Foundation
Ck 12: Physics Simulation: Marie Curie's Classroom
[Free Registration/Login Required] Study the basics of radioactive decay and the properties of atomic nuclei in Marie Curie's laboratory and classroom. A PDF worksheet and a video tutorial are also available. [3:32]
Nobel Media AB
The Nobel Prize: Marie Curie Biographical
This site from the Nobel eMuseum from the Nobel Foundation provides information for you to read about the life and scientific discoveries of Marie Curie (1867-1934 CE), whose work with radioactivity earned her two Nobel Prizes.
Wikimedia
Wikipedia: Carbon
This article from Wikipedia contains great information on the element carbon. Links are provided throughout the article to provided additional information. The topics include: Notable Characteristics, Applications, History, Allotropes,...
Encyclopedia of Earth
Encyclopedia of Earth: Uranium
Information about the radioactive element, Uranium, atomic number 92. Describes its history, physical and atomic properties, how abundant it is on the Earth, and permissible exposure limits. Also discusses sources, uses, isotopes,...
Web Elements
Web Elements Periodic Table: Plutonium
This WebElements site provides a great deal of elemental information. There are audio files demonstrating the correct pronunciation of the element name, pictures showing the electron shells, and information on isotopes, properties and more.
Chem4kids
Chem4 Kids: Atoms
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.
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Nuclear Fission
Analyze nuclear fission chain reactions and how to prevent them as well as explore ways to control nuclear reactions through these simulations.