Editing Roentgenium (section)

===Naming===
Using [[Mendeleev's predicted elements|Mendeleev's nomenclature for unnamed and undiscovered elements]], roentgenium should be known as ''eka-[[gold]]''. In 1979, IUPAC published recommendations according to which the element was to be called ''unununium'' (with the corresponding symbol of ''Uuu''),<ref name="iupac">{{cite journal|author=Chatt, J.|journal=Pure and Applied Chemistry|date=1979|volume=51|pages=381–384|title=Recommendations for the naming of elements of atomic numbers greater than 100|doi=10.1351/pac197951020381|issue=2|doi-access=free}}</ref> a [[systematic element name]] as a [[placeholder name|placeholder]], until the element was discovered (and the discovery then confirmed) and a permanent name was decided on. Although widely used in the chemical community on all levels, from chemistry classrooms to advanced textbooks, the recommendations were mostly ignored among scientists in the field, who called it ''element 111'', with the symbol of ''E111'', ''(111)'' or even simply ''111''.<ref name="Haire" />

The name ''roentgenium'' (Rg) was suggested by the GSI team<ref name="IUPAC-Rg" /> in 2004, to honor the German physicist [[Wilhelm Conrad Röntgen]], the discoverer of [[X-ray]]s.<ref name="IUPAC-Rg">{{Cite journal|url=http://iupac.org/publications/pac/2004/pdf/7612x2101.pdf|title=Name and symbol of the element with atomic number 111|author=Corish|journal=Pure Appl. Chem.|date=2004|volume=76|issue=12|pages=2101–2103|doi=10.1351/pac200476122101|last2=Rosenblatt|first2=G. M.|s2cid=195819587|access-date=March 11, 2008|archive-date=August 9, 2017|archive-url=https://web.archive.org/web/20170809142907/https://www.iupac.org/publications/pac/2004/pdf/7612x2101.pdf|url-status=live}}</ref> This name was accepted by [[IUPAC]] on November 1, 2004.<ref name="IUPAC-Rg" />