This category for chemical elements articles whose importance as a chemical element has been assessed on this scale. Place articles in these categories by typing one of the following on the talk page:

{{Chemical Element|class=XXX|importance=Top}}

{{Chemical Element|class=XXX|importance=High}}

{{Chemical Element|class=XXX|importance=Mid}}

{{Chemical Element|class=XXX|importance=Low}}

See also Category:Chemical elements articles by quality.