| This page is a redirect. The following categories are used to track and monitor this redirect:
- From a cross-project redirect: This is a redirect from a title linked to an item on Wikidata. The Wikidata item linked to this page is oxygen-21 (Q15135440).
- To a list entry: This is a redirect to a list in which the subject is an entry.
- For redirects from a topic to a related list and not to an entry on that list, use {{R from list topic}} instead.
- To an embedded anchor: This is a redirect from a topic that does not have its own page to an embedded anchor on the redirect's target page.
- An
{{anchor|(anchor name)}} or {{visible anchor}} template, a HTML element with id="(anchor name)", or an |id=(anchor name) parameter might be installed at the beginning of a paragraph, in or near a section header or within a table. The anchor might also be an old section header that has been edited and is anchored within or near the new header to prevent broken internal and external links.
- Even though section headers of the general form
==(Header name)== are themselves a type of anchor, use {{R to section}} instead.
When appropriate, protection levels are automatically sensed, described and categorized. |