 | This is a documentation subpage for Template:Infobox element/period-8-elements/overview. It may contain usage information, categories and other content that is not part of the original template page. |
- Usage: see for example Template:Infobox element § Theoretical elements handling documentation
To reduce expensive edits (like checking #ifexists), some logic is derived by presumption (eg using |is-redirect=. And some is hardcoded, eg |isobox-exist=.