Cloudflare fetched the original article and streamed it through HTMLRewriter to apply an entirely new visual system without rebuilding the source page.
// request.cf · coarse context
A page that knows where it met you.
Only coarse request metadata is shown. This demo does not display or persist visitor IP addresses.
This file is supported by WikiProject Elements, which gives a central approach to the chemical elements and their isotopes on Wikipedia. Please participate by editing this file, or visit the project page for more details.ElementsWikipedia:WikiProject ElementsTemplate:WikiProject Elementschemical elements
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This file is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics
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Import failed: This file (or an older revision of this file) contains elements that cannot be accepted for security reasons: <a> elements can only link (href) to data: (embedded file), http:// or https://, or fragment (#, same-document) targets. For other elements, such as <image>, only data: and fragment are allowed. Try embedding images when exporting your SVG. Found <a http://www.w3.org/1999/xlink:href="/helium">.