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2021-03-25T11:25:49Z

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{{infobox element
|number=112
|symbol=Cn
|name=copernicium
|abundance=
|abundance in earth's crust=
|abundance in oceans=
|abundance in solar system=
|left=[[roentgenium]]
|right=[[nihonium]]
|above=[[mercury (element)|Hg]]
|below=(Uhh)
|group=12
|period=7
|block=d
|appearance=
|electrons per shell=2, 8, 18, 32, 32, 18, 2
|electrons per shell comment=''(predicted)''
|phase=liquid
|phase comment=''(predicted)''<ref name=CRNL/>
|phase ref=<ref>Soverna S 2004, [https://repository.gsi.de/record/53528/files/GSI-Report-2004-1.pdf 'Indication for a gaseous element 112,'] in U Grundinger (ed.), ''GSI Scientific Report 2003,'' GSI Report 2004-1, p. 187, ISSN 0174-0814</ref><ref name=CRNL>{{cite journal |last=Mewes |first=J.-M. |last2=Smits |first2=O. R. |last3=Kresse |first3=G. |last4=Schwerdtfeger |first4=P. |title=Copernicium is a Relativistic Noble Liquid |journal=Angewandte Chemie International Edition |date=2019 |doi=10.1002/anie.201906966 |url=https://www.researchgate.net/publication/336389017}}</ref>
|density gpcm3nrt=14.0
|density gpcm3nrt comment=''(predicted)''<ref name=CRNL/>
|melting point K={{nowrap|283 ± 11}}
|melting point C={{nowrap|10 ± 11}}
|melting point F={{nowrap|50 ± 20}}
|melting point comment=''(predicted)''<ref name=CRNL/>
|triple point K = 283
|triple point kPa = 25
|triple point comment=''(predicted)''<ref name=CRNL/>
|boiling point K={{nowrap|340 ± 10}}
|boiling point C={{nowrap|67 ± 10}}
|boiling point F={{nowrap|153 ± 18}}
|boiling point comment=''(predicted'')
|boiling point ref=<ref name=CRNL/>
|crystal structure=hexagonal close-packed
|crystal structure comment=''(predicted)''<ref name=CRNL/>
|number of ionization energies=5
|ionization energy 1=1155
|ionization energy 2=2170
|ionization energy 3=3160
|ionization energy comment=''(all estimated)''<ref name=Haire/>
|atomic radius calculated=147
|atomic radius calculated comment= ''(predicted)''
|atomic radius calculated ref=<ref name=Haire/><ref name=BFricke1>{{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=https://www.researchgate.net/publication/225672062_Superheavy_elements_a_prediction_of_their_chemical_and_physical_properties |access-date=4 October 2013}}</ref>
|covalent radius=122
|covalent radius comment=''(predicted)''<ref name=rsc>[http://www.rsc.org/periodic-table/element/112/copernicium Chemical Data. Copernicium - Cn], Royal Chemical Society</ref>
|CAS number=54084-26-3
|magnetic susceptibility=
|magnetic susceptibility ref=
|isotopes=
{{infobox element/isotopes decay | mn=277 | sym=Cn | na=syn | hl=0.69 ms | dm= α | de= | link1= | pn=273 | ps=Ds}}

{{infobox element/isotopes decay | mn=281 | sym=Cn
| na=syn | hl=0.18 s<ref name=PuCa2017>{{cite journal |last1=Utyonkov |first1=V. K. |last2=Brewer |first2=N. T. |first3=Yu. Ts. |last3=Oganessian |first4=K. P. |last4=Rykaczewski |first5=F. Sh. |last5=Abdullin |first6=S. N. |last6=Dimitriev |first7=R. K. |last7=Grzywacz |first8=M. G. |last8=Itkis |first9=K. |last9=Miernik |first10=A. N. |last10=Polyakov |first11=J. B. |last11=Roberto |first12=R. N. |last12=Sagaidak |first13=I. V. |last13=Shirokovsky |first14=M. V. |last14=Shumeiko |first15=Yu. S. |last15=Tsyganov |first16=A. A. |last16=Voinov |first17=V. G. |last17=Subbotin |first18=A. M. |last18=Sukhov |first19=A. V. |last19=Karpov |first20=A. G. |last20=Popeko |first21=A. V. |last21=Sabel'nikov |first22=A. I. |last22=Svirikhin |first23=G. K. |last23=Vostokin |first24=J. H. |last24=Hamilton |first25=N. D. |last25=Kovrinzhykh |first26=L. |last26=Schlattauer |first27=M. A. |last27=Stoyer |first28=Z. |last28=Gan |first29=W. X. |last29=Huang |first30=L. |last30=Ma |date=30 January 2018 |display-authors=3 |title=Neutron-deficient superheavy nuclei obtained in the 240Pu+48Ca reaction |journal=Physical Review C |volume=97 |issue=14320 |pages=1–10 |doi=10.1103/PhysRevC.97.014320|bibcode=2018PhRvC..97a4320U}}</ref> | dm= α | de=10.28 | link1= | pn=277 | ps=Ds}}

{{infobox element/isotopes decay | mn=282 | sym=Cn | na=syn | hl=0.91 ms | dm= SF | de= | link1= | pn= | ps=}}

{{infobox element/isotopes decay3 | mn=283 | sym=Cn | na=syn | hl=4.2 s<ref name=bnl>[http://www.nndc.bnl.gov/chart/reCenter.jsp?z=112&n=171 Chart of Nuclides]. Brookhaven National Laboratory</ref>
|dm1=90% α | de1=9.53, 9.32, 8.94 | link1=darmstadtium-279 | pn1=279 | ps1=Ds
|dm2=10% SF | de2= |pn2= |ps2=– |link3=roentgenium-283 |dm3=[[electron capture|EC]]? |de3= |pn3=283 |ps3=Rg}}

{{infobox element/isotopes decay2 | mn=284 | sym=Cn | na=syn | hl=98 ms
| dm1=98% SF | de1= | link1= | pn1= | ps1=–
| dm2=2% α<ref name=280Ds2021>{{Cite journal |url = https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.126.032503|doi = 10.1103/PhysRevLett.126.032503|title = Spectroscopy along Flerovium Decay Chains: Discovery of 280Ds and an Excited State in 282Cn|journal = Physical Review Letters|volume = 126|pages = 032503|year = 2021|last1 = Såmark-Roth|first1 = A.|last2 = Cox|first2 = D. M.|last3 = Rudolph|first3 = D.|last4 = Sarmento|first4 = L. G.|last5 = Carlsson|first5 = B. G.|last6 = Egido|first6 = J. L.|last7 = Golubev|first7 = P|last8 = Heery|first8 = J.|last9 = Yakushev|first9 = A.|last10 = Åberg|first10 = S.|last11 = Albers|first11 = H. M.|last12 = Albertsson|first12 = M.|last13 = Block|first13 = M.|last14 = Brand|first14 = H.|last15 = Calverley|first15 = T.|last16 = Cantemir|first16 = R.|last17 = Clark|first17 = R. M.|last18 = Düllmann|first18 = Ch. E.|last19 = Eberth|first19 = J.|last20 = Fahlander|first20 = C.|last21 = Forsberg|first21 = U.|last22 = Gates|first22 = J. M.|last23 = Giacoppo|first23 = F.|last24 = Götz|first24 = M.|last25 = Hertzberg|first25 = R.-D.|last26 = Hrabar|first26 = Y.|last27 = Jäger|first27 = E.|last28 = Judson|first28 = D.|last29 = Khuyagbaatar|first29 = J.|last30 = Kindler|first30 = B.|display-authors = 3}}</ref> |de2=9.33 |link2=darmstadtium-280 |pn2=280 |ps2=Ds}}

{{infobox element/isotopes decay | mn=285 | sym=Cn | na=syn | hl=28 s | dm= [[alpha decay|α]] | de=9.15, 9.03? | link1=darmstadtium-281 | pn=281 | ps=Ds}}

{{infobox element/isotopes decay | mn=286 | sym=Cn | na=[[synthetic radioisotope|syn]] |hl=8.45 s ? |dm=[[spontaneous fission|SF]] |de= |pn= |ps=–}}

|naming=after [[Nicolaus Copernicus]]
|discovered by=[[Gesellschaft für Schwerionenforschung]]
|discovery date=1996
|QID=Q1278
}}<noinclude>
{{Infobox element/element navigation|symbol=Cn}}
{{Template reference list}}
{{documentation|1=Template:Infobox element/doc}}
</noinclude>

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setup>Quebec99: Fix duplicate ref names – You can help!