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...with {{chem|202|Hg}} being the most abundant (29.86%). The longest-lived [[radioisotope]]s are {{chem|194|Hg}} with a [[half-life]] of 444 years, and {{chem|203|Hg ...5630018.</ref> Nevertheless thiomersal has been removed from or reduced to trace amounts in all U.S. vaccines recommended for children 6 years of age and un

...detoxification of [[superoxide]] free radicals. The element is a required trace mineral for all known living organisms. In larger amounts, and apparently w ...manganese is composed of 1 stable [[isotope]], ⁵⁵Mn. Eighteen [[radioisotope]]s have been characterized with the most stable being ⁵³Mn with

...leaching]] processes. Although trivalent chromium (Cr(III)) is required in trace amounts for [[sugar]] and [[lipid]] [[metabolism]], few cases have been rep ...sup>Cr being the most abundant (83.789% [[natural abundance]]). Nineteen [[radioisotope]]s have been characterized with the most stable being ⁵⁰Cr with

...avy, odorless [[noble gas]], xenon occurs in the [[Earth's atmosphere]] in trace amounts.<ref>{{cite web Xenon is a [[trace gas]] in [[Earth's atmosphere]], occurring at 0.087±0.001&nbsp;[[Parts-per