Radioactive decay carbon 14 dating
Naturally occurring radioisotopes can be used to date : Radioisotopes that emit low-penetrating alpha particles and that have a relatively long half-life have found use in domestic settings such as smoke detectors.
To be useful, radioisotopes with very short half-lives, such as those measured in seconds, hours, or days, are produced in nuclear reactors or cyclotrons close to the where they will be used. These radioisotopes are particularly useful in medical applications.
the elements beyond bismuth (Bi) in the Periodic Table of the Elements display radioactivity.
There are natually occurring radioactive isotopes of many of the other elements as well.
You have probably heard (and used) many of the following terms: All of these terms are related by the fact that they all have something to do with nuclear elements, either natural or man-made. And in the aftermath of the March 2011 earthquake and tsunami that struck Japan, a nuclear crisis raised fears about radiation and questions about the safety of nuclear power.Nuclear radiation can be both extremely beneficial and extremely dangerous. X-ray machines, some types of sterilization equipment and nuclear power plants all use nuclear radiation -- but so do nuclear weapons.The second lesson, Radioactive Decay: A Sweet Simulation of Half-life, introduces the idea of half-life.By the end of the 8th grade, students should know that all matter is made up of atoms, which are far too small to see directly through a microscope.