ædelgasser / Noble Gases

En ædelgas er et grundstof i gruppe 18 (tidligere kendt som ottende hovedgruppe) i det periodiske system.
Disse grundstoffer, karakteriseres som ikke-metalliske og kemisk inaktive, er gasser ved standardbetingelser.
De seks ædelgasser er argon, helium, krypton, neon, radon og xenon.
Radioaktive ædelgasser anvendes til at dokumentere atomvåbenforsøg.
Se også: Atomfysik ; naturvidenskab ; ædelmetal.


Environmental low-level noble gas measurements for nuclear non-proliferation treaty verification purposes. Safeguard Symposium, 20-24 October 2014, Vienna, Austria. Anders Ringbom et al. Safeguard Symposium, 20-24 October 2014, Vienna, Austria.
- https://www.iaea.org/safeguards/symposium/2014/home/eproceedings/sg2014-slides/000046.pdf
if 37Ar is found in soil gas, this is a certain proof of a nuclear explosion.
It was shown that measurements of radioactive noble gases have been used since the Manhattan Project in the 1940s and later during the Cold War to monitor other countries on their nuclear (weapon) programme and progress and has permanently been further developed;
Nowadays, noble gases play an important role as a tool for international nuclear verification regimes and are a key component of the non-proliferation verification.
ERIC ED043518: The Chemistry of the Noble Gases, Understanding the Atom Series, 1967.
- https://archive.org/details/ERIC_ED043518
The history of the discovery, isolation, characterization, production and use of argon, krypton, xenon, helium, and radon is followed by an account of early attempts to react them with other elements. The use of the electron shell theory of valence to explain their inertness and the reactions of chemists to the production of xenon compounds is described. The presently know n compounds of xenon and krypton are listed, and the use of molecular shapes of these compounds as determined by x-ray crystallagraphy and electron diffraction to test theories of chemical bonding is discussed. Illustrations, a short bibliography, and a film list are included. (AL)

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