That would imply that inside a black hole, atoms stay intact as such. We don't know if that is the case, but predictions seem to speak in another direction. If there were no longer separate "atom" entities, the concept of a chemical composition would become obsolete.

https://www.nature.com/scitable/blog/thebeyond/what_happens_to_matter_inside/

https://www.physicsforums.com/threads/what-happens-to-the-matter-inside-a-black-hole.966475