text: # Astatine
  Chăng-kō̤ Mìng-dĕ̤ng-ngṳ̄ Háng-cê gì bēng-buōng. / 參考閩東語漢字其版本。
  Astatine sê siŏh cṳ̄ng gĭng-sṳ̆k, iâ sê siŏh cṳ̄ng huá-hŏk nguòng-só.  Nguòng-cṳ̄ sê̤ṳ-só sê 85, huá-hŏk hù-hô̤ sê At.
title: Astatine
wikitext: {{twinLAT|砹}}
  {{infobox element
  |name=Astatin
  |enname=astatine
  |laname=Astatium
  |number=85
  |symbol=At
  |left=[[polonium|Poloni]]
  |right=[[Radon]]
  |above=[[Diēng]]
  |below=[[Tennessine]]
  |series=lôi-gĭng-sṳ̆k
  |series comment=sometimes classified as a nonmetal, or a [[metal]]{{sfn|Corson|MacKenzie|Segrè|1940}}<ref name="Hermann">{{cite journal
   |doi=10.1103/PhysRevLett.111.116404|title=Condensed Astatine: Monatomic and Metallic|year=2013|last1=Hermann|first1=A.|last2=Hoffmann|first2=R.|last3=Ashcroft|first3=N. W.|journal=Physical Review Letters|volume=111|issue=11|pages=116404-1—116404-5}}</ref>
  |group=17
  |period=6
  |block=p
  |series color=
  |appearance=unknown, probably metallic
  |image name=
  |image name comment=
  |image name 2=
  |image name 2 comment=
  |atomic mass=(210)
  |atomic mass 2=
  |atomic mass comment=
  |electron configuration=&#91;[[xenon|Xe]]&#93; 4f<sup>14</sup> 5d<sup>10</sup> 6s<sup>2</sup> 6p<sup>5</sup>
  |electrons per shell=2, 8, 18, 32, 18, 7
  |color=
  |phase=gó-tā̤
  |phase comment=
  |density gplstp=
  |density gpcm3nrt=(At<sub>2</sub>) 6.35±0.15
  |density gpcm3nrt comment=''(predicted)''<ref name="B&K">{{cite journal |last1=Bonchev |first1=D. |last2=Kamenska |first2=V. |year=1981 |title=Predicting the Properties of the 113–120 Transactinide Elements |journal=The Journal of Physical Chemistry |volume=85 |issue=9 |pages=1177–86 |publisher=ACS Publications |doi=10.1021/j150609a021 |url=http://pubs.acs.org/doi/abs/10.1021/j150609a021 |accessdate=6 May 2013}}</ref>
  |density gpcm3mp=
  |molar volume=(At<sub>2</sub>) 32.94
  |molar volume ref=
  |molar volume comment=''(predicted)''<ref name=B&K/>
  |melting point K=575
  |melting point C=302
  |melting point F=576
  |boiling point K=610
  |boiling point C=337
  |boiling point F=639
  |triple point K=
  |triple point kPa=
  |critical point K=
  |critical point MPa=
  |heat fusion=ca. 6
  |heat vaporization=(At<sub>2</sub>) 54.39
  |heat vaporization ref=<ref name="Glushko">{{cite book|first1=V. P.|last1=Glushko |first2=V. A.|last2=Medvedev|last3=Bergma|first3=G. A.|year=1966|title=Termicheskie Konstanty Veshchestv|language=Russian|volume=1|publisher=Nakua|p=65}}</ref>
  |heat capacity=
  |vapor pressure 1=361
  |vapor pressure 10=392
  |vapor pressure 100=429
  |vapor pressure 1 k=475
  |vapor pressure 10 k=531
  |vapor pressure 100 k=607
  |vapor pressure comment=
  |crystal structure=face-centered cubic
  |crystal structure comment=''(predicted)''<ref name="Hermann" />
  |oxidation states='''−1''', '''+1''', +3, +5, +7{{sfn|Greenwood|Earnshaw|2002|p=28}}
  |oxidation states comment=
  |electronegativity=2.2
  |number of ionization energies=1
  |ionization energy 1=899.003
  |ionization energy 1 ref=<ref>{{cite journal |last1=Rothe |first1=S. |last2=Andreyev |first2=A. N. |last3=Antalic |first3=S. |last4=Borschevsky |first4=A. |last5=Capponi |first5=L. |last6=Cocolios |first6=T. E. |last7=De Witte |first7=H. |last8=Eliav |first8=E. |last9=Fedorov |first9=D. V. | displayauthors=8
  |year=2013 |title=Measurement of the First Ionization Potential of Astatine by Laser Ionization Spectroscopy |journal=Nature Communications |volume=4 |publisher= |doi=10.1038/ncomms2819 |url=http://www.researchgate.net/publication/236836716_Measurement_of_the_first_ionization_potential_of_astatine_by_laser_ionization_spectroscopy |last10=Fedosseev |first10=V. N. |last11=Fink |first11=D. A. |last12=Fritzsche |first12=S. |last13=Ghys |first13=L. |last14=Huyse |first14=M. |last15=Imai |first15=N. |last16=Kaldor |first16=U. |last17=Kudryavtsev |first17=Yuri |last18=Köster |first18=U. |last19=Lane |first19=J. F. W. |last20=Lassen |first20=J. |last21=Liberati |first21=V. |last22=Lynch |first22=K. M. |last23=Marsh |first23=B. A. |last24=Nishio |first24=K. |last25=Pauwels |first25=D. |last26=Pershina |first26=V. |last27=Popescu |first27=L. |last28=Procter |first28=T. J. |last29=Radulov |first29=D. |last30=Raeder |first30=S. |pages=1–6 |pmid=23673620 |pmc=3674244}}</ref>
  |atomic radius=
  |covalent radius=150
  |Van der Waals radius=202
  |magnetic ordering=
  |electrical resistivity=
  |electrical resistivity at 0=
  |electrical resistivity at 20=
  |thermal conductivity=1.7
  |thermal conductivity 2=
  |thermal diffusivity=
  |thermal expansion=
  |thermal expansion at 25=
  |speed of sound=
  |speed of sound rod at 20=
  |speed of sound rod at r.t.=
  |Young's modulus=
  |Shear modulus=
  |Bulk modulus=
  |Poisson ratio=
  |Mohs hardness=
  |Vickers hardness=
  |Brinell hardness=
  |CAS number=7440-68-8
  |isotopes=
  {{infobox element/isotopes decay2 | mn=209 | sym=At
   | na=[[synthetic radioisotope|syn]] | hl=5.41&nbsp;h
   | dm1=[[positron emission|β<sup>+</sup>]] | de1=3.486 | link1=polonium-209 | pn1=209 | ps1=Po
   | dm2=[[alpha decay|α]] | de2=5.758 | link2=bismuth-205 | pn2=205 | ps2=Bi}}
  {{infobox element/isotopes decay2 | mn=210 | sym=At
   | na=syn | hl=8.1&nbsp;h
   | dm1=β<sup>+</sup> | de1=3.981 | link1=polonium-210 | pn1=210 | ps1=Po
   | dm2=α | de2=5.632 | link2=bismuth-206 | pn2=206 | ps2=Bi}}
  {{infobox element/isotopes decay2 | mn=211 | sym=At
   | na=syn | hl=7.21&nbsp;h
   | dm1=[[electron capture|ε]] | de1=0.786 | link1=polonium-211 | pn1=211 | ps1=Po
   | dm2=α | de2=5.983 | link2=bismuth-207 | pn2=207 | ps2=Bi}}
  |isotopes comment=
  |discovered by=[[Dale R. Corson]], [[Kenneth Ross MacKenzie]], [[Emilio Segrè]]
  |discovery date=1940
  | naming=after Greek ''astatos'' (αστατος), meaning "unstable"
  }}
  '''Astatine''' sê siŏh cṳ̄ng [[gĭng-sṳ̆k]], iâ sê siŏh cṳ̄ng [[huá-hŏk nguòng-só]].  [[Nguòng-cṳ̄ sê̤ṳ-só]] sê 85, huá-hŏk hù-hô̤ sê At.
  ==Huá-hŏk séng-cék==
  
  ==Éng-ê̤ṳng==
  
  ==Cié-chṳ̄==
  
  ==Chăng-kō̤ cṳ̆-lâiu==
  {{reflist}}
  
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  [[分類:Huá-hŏk nguòng-só]]