User talk:2606:A000:121C:44D:357D:286C:6AC2:EA9C

April 2020
Please do not add or change content, as you did at Extended periodic table, without citing a reliable source. Please review the guidelines at Citing sources and take this opportunity to add references to the article. Thank you. ComplexRational (talk) 21:45, 7 April 2020 (UTC)
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