This is a chart showing Selected Radioactive Isotopes including: Decay Mode(s), Energy(MeV), y-Ray Energy(MeV), and more.

Learn what radioactive isotopes are and the different ways that they are used in medicine.

[Free Registration/Login may be required to access all resource tools.] An overview of radioactive decay.

[Free Registration/Login may be required to access all resource tools.] An overview of radioactive decay.

Describes the characteristics of carbon and what an isotope is. Presents a chart of carbon isotopes listing nuclide symbol, atomic weight, half-life, and nuclear spin, as well as a second chart listing radioactive carbon isotopes....

This overview of isotopes explores where isotopes come from and returning an atom to its normal state.

Start a chain reaction, or introduce non-radioactive isotopes to prevent one. Control energy production in a nuclear reactor.

Learn about radioactivity, the different types of radioactive decay, isotopes, and half-life of a radioactive element. Includes a long chart listing radioactive elements, atomic number and mass number, decay type, and length of half-life.

[Free Registration/Login may be required to access all resource tools.] Definition of isotopes, how they are named and their stability.

Determine the activity of a radioactive sample by measuring the counts per minute that are detected by a sensor.

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.

In this activity, middle schoolers 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...

Interesting information including: average annual dosage, radioactivity in space, in the human body, and in the oceans.

[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.

A very readable account of the discovery of radioactivity and its properties.

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.

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...

A simple explanation of neutron activation of some natural elements in order to create a radioactive nucleus.

This site provides an overview of radioactive dating, a process used to determine the age of rocks and other materials.

Read the passage and study the graphic to complete the five-question quiz about the properties of radioactive tracers.

Study the science of isotopes in chemistry including naming isotopes, hydrogen, examples, fun facts, unstable, and stable on this site.

[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.

Students will do research relating half-life and the age of radioactive substances on interesting topics.

This entry provides a summary of radioactivity in nature and the decay chain.