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isotope group

См. также в других словарях:

  • Isotope analysis — is the identification of isotopic signature, the distribution of certain stable isotopes and chemical elements within chemical compounds. This can be applied to a food web to make it possible to draw direct inferences regarding diet, trophic… …   Wikipedia

  • nitrogen group element — ▪ chemical elements Introduction  any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… …   Universalium

  • 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

  • Protecting group — A protecting group or protective group is introduced into a molecule by chemical modification of a functional group in order to obtain chemoselectivity in a subsequent chemical reaction. It plays an important role in multistep organic synthesis.… …   Wikipedia

  • Atomic vapor laser isotope separation — AVLIS Is an acronym which stands for atomic vapor laser isotope separation and is a method by which specially tuned lasers are used to separate isotopes of uranium using selective ionization of hyperfine transitions. In the largest technology… …   Wikipedia

  • Columbia River Basalt Group — The Columbia River Basalt Group (including the Steen and Picture Gorge basalts) extends over portions of five states. The Columbia River Basalt Group is a large igneous province that lies across parts of the Western United States . It is found in …   Wikipedia

  • Michigan State University Vietnam Advisory Group — The Michigan State University Vietnam Advisory Group (commonly known as the Michigan State University Group and abbreviated MSUG) was a program of technical assistance provided to the government of South Vietnam as an effort in state building by… …   Wikipedia

  • oxygen group element — ▪ chemical element Introduction also called  chalcogen,    any of the five chemical elements making up Group 16 (VIa) of the periodic classification namely, oxygen, sulfur, selenium, tellurium, and polonium. (See Figure >.) A relationship among… …   Universalium

  • Marine Conservation Society South East Group — MCS Logo Marine Conservation Society South East Group is part of the national organisation, the Marine Conservation Society, playing its part in the Society s national campaigns as well as having activities of its own. Contents 1 …   Wikipedia

  • Pokhran-II — Operation Shakti Image of Shaft III named Shakti Information Country  India Test site Indian Army …   Wikipedia

  • List of elements by symbol — TOCright This is a list of chemical elements by symbol, including the current signification used to identify the chemical elements as recognized by the International Union of Pure and Applied Chemistry, as well as proposed and historical signs.… …   Wikipedia

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