Wikipedia:Articles for deletion/List of fictional elements, materials, isotopes and atomic particles (2nd nomination)
The subject is notable, and it's clear from the span of the list that there should be a central collection of the things, for which a list is ideal. The list might need pruning to remove those fictional elements that are not notable, but |AfD is not for cleanup
— User:The, 16:09, 7 October 2011 (UTC)
Stance: keep
Cited policy: WP:NOTCLEANUP (Wikipedia:Arguments to avoid in deletion discussions)