「元素週期表」:各本之異
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第四行:
此表所列,可繫諸原行之近性,亦可測新察得者而考其性也。創表者,[[俄羅斯|俄]]化學家[[門捷列夫]]也,一八六九年製成,旨律所察之諸元素,又能估未得元素之性。嗣後,多有發現,又推新模型,漸次更易,以至今貌。今為[[化學反應|化效]]分析、[[化學]]諸範、並[[核物理]]所用。
今覓有原行序一(氫)至一百一十八(鿫),首七週期俱全<ref>{{cite web|url=https://www.bbc.co.uk/news/science-environment-35220823|title=Chemistry: Four elements added to periodic table|date=2016-01-04|work=BBC News|archiveurl=https://web.archive.org/web/20160104125144/http://www.bbc.co.uk/news/science-environment-35220823|archivedate=2016-01-04|deadurl=no}}</ref><ref>{{cite web|url=https://www.nytimes.com/2016/12/01/science/periodic-table-new-elements.html?rref=collection%2Fsectioncollection%2Fscience&action=click&contentCollection=science®ion=rank&module=package&version=highlights&contentPlacement=1&pgtype=sectionfront|title=Four New Names Officially Added to the Periodic Table of Elements|date=2016-12-01|last=St. Fleur|first=Nicholas|work=New York Times|archiveurl=https://web.archive.org/web/20170814221055/https://www.nytimes.com/2016/12/01/science/periodic-table-new-elements.html?rref=collection%2Fsectioncollection%2Fscience&action=click&contentCollection=science®ion=rank&module=package&version=highlights&contentPlacement=1&pgtype=sectionfront|archivedate=2017-08-14|deadurl=no}}</ref>。自然所得者,有
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