Editing Caesium (section)

== Spelling ==
''Caesium'' is the spelling recommended by the [[International Union of Pure and Applied Chemistry]] (IUPAC).<ref>{{RedBook2005|pages=248–49}}.</ref> The [[American Chemical Society]] (ACS) has used the spelling ''cesium'' since 1921,<ref>{{cite book |editor1-first=Anne M. |editor1-last=Coghill |editor2-first=Lorrin R. |editor2-last=Garson |date=2006 |title=The ACS Style Guide: Effective Communication of Scientific Information |edition=3rd |publisher=American Chemical Society |location=Washington, D.C. |isbn=978-0-8412-3999-9 |page=[https://archive.org/details/acsstyleguideeff0000unse/page/127 127] |url=https://archive.org/details/acsstyleguideeff0000unse/page/127}}</ref><ref>{{cite journal |journal=Pure Appl. Chem. |volume=70 |issue=1 |last1=Coplen |pages=237–257 |date=1998 |first1=T. B. |url=http://old.iupac.org/reports/1998/7001coplen/history.pdf |archive-url=https://web.archive.org/web/20110521151650/http://old.iupac.org/reports/1998/7001coplen/history.pdf |archive-date=2011-05-21 |url-status=live |last2=Peiser |first2=H. S. |title=History of the recommended atomic-weight values from 1882 to 1997: a comparison of differences from current values to the estimated uncertainties of earlier values |doi=10.1351/pac199870010237 |s2cid=96729044}}</ref> following ''Webster's New International Dictionary''. The element was named after the Latin word ''[[wikt:caesius#Adjective|caesius]]'', meaning "bluish grey".<ref>[http://www.oed.com/view/Entry/26023 OED entry for "caesium"] {{Webarchive|url=https://web.archive.org/web/20240305132946/https://www.oed.com/dictionary/caesium_n |date=5 March 2024 }}. Second edition, 1989; online version June 2012. Retrieved 7 September 2012. Earlier version first published in ''New English Dictionary'', 1888.</ref> In medieval and early modern writings ''caesius'' was spelled with the [[typographic ligature|ligature]] ''[[Æ#Latin and Greek|æ]]'' as ''cæsius''; hence, an alternative but now old-fashioned orthography is ''cæsium''. More spelling explanation at [[American and British English spelling differences#ae and oe|ae/oe vs e]].