natural radioactive isotope

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• Isotope — This article is about the atomic variants of chemical elements. For the British jazz fusion band, see Isotope (band). Isotopes redirects here. For the minor league baseball team, see Albuquerque Isotopes. Isotopes are variants of atoms of a… …   Wikipedia

• isotope — isotopic /uy seuh top ik/, adj. isotopically, adv. /uy seuh tohp /, n. Chem. any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons in… …   Universalium

• Natural abundance — In chemistry, natural abundance (NA) refers to the abundance of isotopes of a chemical element as naturally found on a planet. The relative atomic mass (a weighted average) of these isotopes is the atomic weight listed for the element in the… …   Wikipedia

• Isotope separation — is the process of concentrating specific isotopes of a chemical element by removing other isotopes, for example separating natural uranium into enriched uranium and depleted uranium. This is a crucial process in the manufacture of uranium fuel… …   Wikipedia

• Radioactive waste — 2007 ISO radioactivity danger logo, designed in part for long term radioactive waste depositories which might survive into a far future time in which all knowledge of the meaning of present common radiation danger symbols and signs has been lost… …   Wikipedia

• Radioactive contamination — The radiation warning symbol (trefoil) …   Wikipedia

• Radioactive decay — For particle decay in a more general context, see Particle decay. For more information on hazards of various kinds of radiation from decay, see Ionizing radiation. Radioactive redirects here. For other uses, see Radioactive (disambiguation).… …   Wikipedia

• Natural nuclear fission reactor — Geological situation in Gabon leading to natural nuclear fission reactors 1. Nuclear reactor zones 2. Sandstone 3. Uranium ore layer 4. Granite A natural nuclear fission reactor is a uranium deposit where analysis of isotope ratios has shown that …   Wikipedia

• Radioactive tracer — A radioactive tracer, also called a radioactive label, is a substance containing a radioisotope(which is an isotope that has an unstable nucleus and that stabalizes itself by spontaneously emitting energy and particles). Tracers can be used to… …   Wikipedia

• List of crimes involving radioactive substances — This is a list of criminal (or arguably, allegedly, or potentially criminal) acts involving radioactive substances. Inclusion in this list does not necessarily imply that anyone involved was guilty of a crime. Contents 1 Use of alpha emitters for …   Wikipedia

• Stable isotope — Graph of isotopes/nuclides by type of decay. Orange and blue nuclides are unstable, with the black squares between these regions representing stable nuclides. The unbroken line passing below many of the nuclides represents the theoretical… …   Wikipedia