text: # Roentgenium
  Chăng-kō̤ Mìng-dĕ̤ng-ngṳ̄ Háng-cê gì bēng-buōng. / 參考閩東語漢字其版本。
  Roentgenium sê siŏh cṳ̄ng huá-hŏk nguòng-só.  Nguòng-cṳ̄ sê̤ṳ-só sê 111, huá-hŏk hù-hô̤ sê Rg.
title: Roentgenium
wikitext: {{twinLAT|錀}}
  {{Infobox element
  |number=111
  |symbol=Rg
  |name=Roentgeni
  |laname=roentgenium
  |left=[[darmstadtium|Darmstadti]]
  |right=[[copernicium|Copernici]]
  |above=[[Gĭng]]
  |below=(Uht)
  |series=mâ̤ hiēu
  |series comment=but probably a [[transition metal]]
  |group=11
  |period=7
  |block=d
  |appearance=silvery ''(predicted)''<ref name="e-conf"/>
  |atomic mass=[282]
  |electron configuration=&#91;[[radon|Rn]]&#93; 5f<sup>14</sup> 6d<sup>9</sup> 7s<sup>2</sup>
  |electron configuration comment=''(predicted)''<ref name="e-conf">{{Cite journal|url=http://wwwsoc.nii.ac.jp/jnrs/paper/JN52/j052Turler.pdf|title=Gas Phase Chemistry of Superheavy Elements|author=Turler, A.|journal=Journal of Nuclear and Radiochemical Sciences|volume=5|issue=2|pages=R19–R25|year=2004|accessdate=2018-06-10|archive-date=2011-06-11|archive-url=https://web.archive.org/web/20110611232654/http://wwwsoc.nii.ac.jp/jnrs/paper/JN52/j052Turler.pdf|deadurl=yes}}</ref><ref name=Haire/>
  |electrons per shell=2, 8, 18, 32, 32, 17, 2
  |electrons per shell comment=''(predicted)''
  |phase=gó-tā̤
  |phase comment=''(predicted)''<ref name=bcc/>
  |density gpcm3nrt=28.7
  |density gpcm3nrt comment=''(predicted)''<ref name=Haire/>
  |crystal structure=body-centered cubic
  |crystal structure comment=''(predicted)''<ref name=bcc>{{cite journal|doi=10.1103/PhysRevB.84.113104|title=First-principles calculation of the structural stability of 6d transition metals|year=2011|last1=Östlin|first1=A.|last2=Vitos|first2=L.|journal=Physical Review B|volume=84|issue=11|bibcode=2011PhRvB..84k3104O }}</ref>
  |oxidation states=5, '''3''', 1, −1
  |oxidation states comment=''(predicted)''<ref name=Haire>{{cite book| title=The Chemistry of the Actinide and Transactinide Elements| editor1-last=Morss|editor2-first=Norman M.| editor2-last=Edelstein| editor3-last=Fuger|editor3-first=Jean| last1=Hoffman|first1=Darleane C. |last2=Lee |first2=Diana M. |last3=Pershina |first3=Valeria |chapter=Transactinides and the future elements| publisher= [[Springer Science+Business Media]]| year=2006| isbn=1-4020-3555-1| location=Dordrecht, The Netherlands| edition=3rd| ref=CITEREFHaire2006}}</ref><ref name=BFricke/>
  |number of ionization energies=5
  |ionization energy 1=1022.7
  |ionization energy 2=2074.4
  |ionization energy 3=3077.9
  |ionization energy comment=''(all estimated)''<ref name=Haire/>
  |atomic radius=138
  |atomic radius comment=''(predicted)''<ref name=Haire/><ref name=BFricke>{{cite journal |last1=Fricke |first1=Burkhard |year=1975 |title=Superheavy elements: a prediction of their chemical and physical properties |journal=Recent Impact of Physics on Inorganic Chemistry |volume=21 |pages=89–144 |doi=10.1007/BFb0116498 |url=http://www.researchgate.net/publication/225672062_Superheavy_elements_a_prediction_of_their_chemical_and_physical_properties |accessdate=4 October 2013}}</ref>
  |covalent radius=121
  |covalent radius comment=''(estimated)''<ref name=rsc>[http://www.rsc.org/chemsoc/visualelements/pages/data/roentgenium_data.html Chemical Data. Roentgenium - Rg], Royal Chemical Society</ref>
  |CAS number=54386-24-2
  |isotopes=
  {{infobox element/isotopes decay | mn=282 | sym=Rg<ref>{{cite journal|last1=Khuyagbaatar|first1=J.|last2=Yakushev|first2=A.|last3=Düllmann|first3=Ch. E.|title=<sup>48</sup>Ca+<sup>249</sup>Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying <sup>270</sup>Db and Discovery of <sup>266</sup>Lr|journal=Physical Review Letters|volume=112|issue=17|pages=172501|year=2014|doi=10.1103/PhysRevLett.112.172501|url=http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.172501|display-authors=etal}}</ref> | na=[[synthetic radioisotope|syn]] | hl=2.1{{su|p=+1.4|b=−0.6}}&nbsp;min | dm=[[alpha decay |α]] | de=9.00 | link1=meitnerium-278 | pn=278 | ps=Mt}}
  {{infobox element/isotopes decay2 | mn=281 | sym=Rg<ref name=2012e117>{{Cite journal | last1 = Oganessian | first1 = Yuri Ts. | last2 = Abdullin | first2 = F. Sh. | last3 = Alexander | first3 = C. | last4 = Binder | first4 = J. | last5 = Boll | first5 = R. A. | last6 = Dmitriev | first6 = S. N. | last7 = Ezold | first7 = J. | last8 = Felker | first8 = K. | last9 = Gostic | first9 = J. M. <!--
  R. K. Grzywacz
  J. H. Hamilton
  R. A. Henderson
  M. G. Itkis
  K. Miernik
  D. Miller
  K. J. Moody
  A. N. Polyakov
  A. V. Ramayya
  J. B. Roberto
  M. A. Ryabinin
  K. P. Rykaczewski
  R. N. Sagaidak
  D. A. Shaughnessy
  I. V. Shirokovsky
  M. V. Shumeiko
  M. A. Stoyer
  N. J. Stoyer
  V. G. Subbotin
  A. M. Sukhov
  Yu. S. Tsyganov
  Vladimir K. Utyonkov
  A. A. Voinov
  G. K. Vostokin
  -->| title = Experimental studies of the <sup>249</sup>Bk + <sup>48</sup>Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope <sup>277</sup>Mt | doi = 10.1103/PhysRevC.87.054621 | journal = Physical Review C | publisher = American Physical Society | volume = 87 <!--| issue = 5 -->| number = 054621 | date = 2013-05-30 | bibcode = 2013PhRvC..87e4621O | displayauthors = 3}}</ref><ref name=Mt>{{cite journal
   |last1=Oganessian |first1=Yu. Ts.
   |year=2013
   |title=Experimental studies of the <sup>249</sup>Bk + <sup>48</sup>Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope <sup>277</sup>Mt
   |journal=[[Physical Review C]]
   |volume=87 |issue=5 |pages=054621
   |bibcode=2013PhRvC..87e4621O
   |doi=10.1103/PhysRevC.87.054621
  |display-authors=etal}}</ref> | na=syn | hl=17{{su|p=+6|b=−3}}&nbsp;s | dm1=[[spontaneous fission|SF]] (90%) | de1= | pn1= | ps1= | dm2=α (10%) | de2= | link2=meitnerium-277 | pn2=277 | ps2=Mt}}
  {{infobox element/isotopes decay | mn=280 | sym=Rg | na=syn | hl=3.6&nbsp;s | dm=α | de=9.75 | link1=meitnerium-276 | pn=276 | ps=Mt}}
  {{infobox element/isotopes decay | mn=279 | sym=Rg | na=syn | hl=0.17&nbsp;s | dm=α | de=10.37 | link1=meitnerium-275 | pn=275 | ps=Mt}}
  |naming=after [[Wilhelm Röntgen]]
  |discovered by=[[Gesellschaft für Schwerionenforschung]]
  |discovery date=1994
  }}
  '''Roentgenium''' sê siŏh cṳ̄ng [[huá-hŏk nguòng-só]].  [[Nguòng-cṳ̄ sê̤ṳ-só]] sê 111, huá-hŏk hù-hô̤ sê Rg. 
  
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