https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&feedformat=atom&user=172.71.190.132explain xkcd - User contributions [en]2026-05-31T05:58:16ZUser contributionsMediaWiki 1.30.0https://www.explainxkcd.com/wiki/index.php?title=Talk:2723:_Outdated_Periodic_Table&diff=304545Talk:2723: Outdated Periodic Table2023-01-11T15:39:36Z<p>172.71.190.132: </p>
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https://en.wikipedia.org/wiki/Big_Bang_nucleosynthesis BBN did only produce unstable Berylium-7 with a half-life of 53.22 days. Thus after 30 minutes there was still plenty of Be-7 left.<br />
--[[Special:Contributions/172.71.160.38|172.71.160.38]] 15:36, 11 January 2023 (UTC)<br />
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"unnilium" is a reference to "unnilunium", which was the name for Mendelevium (atomic number 101; from "un nil un", 1-0-1) before it was given a formal name. Therefore the 6th new element referenced, on top of the 4 already in the table, would be #10, or "un nil", or unnilium. [[Special:Contributions/172.71.190.132|172.71.190.132]]</div>172.71.190.132