Wikipedia 10K Redux by Reagle from Starling archive. Bugs abound!!!

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Noble gas

The [[chemical element]]s in group VIIIA  of the [[Periodic Table]]; specifically [[Helium]], [[Neon]], [[Argon]], [[Krypton]], [[Xenon]] and [[Radon]].

These elements all have full outer electron shells, and so do not form chemical compounds easily. As the atoms get larger down the series, they become (slightly) more reactive, and Xenon has been induced to form a number of compunds with fluorine. Radon would be presumed to be more reactive, but as it is [[Radioactivity|radioactive]] with a short half-life, its potential chemistry has not been explored.