File talk:Decay Chain Thorium.svg
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Note this is a duplicate file to https://commons.wikimedia.org/wiki/File:Decay_Chain_of_Thorium.svg, however the other file has the units of Ac-228 and Pb-212 wrong. — 以上未簽名的留言是由該使用者加入的: Altnuc (留言 • 貢獻) 17:11, 5 September 2019 (UTC)