Editing Template:Infobox astatine

{{infobox element
|name=astatine
|number=85
|symbol=At
|abundance=
|abundance in earth's crust=
|abundance in oceans=
|abundance in solar system=
|left=[[polonium]]
|right=[[radon]]
|above=[[iodine|&nbsp;I&nbsp;]]
|below=[[tennessine|Ts]]
|category=metalloid
|category 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|bibcode=2013PhRvL.111k6404H|pmid=24074111}}</ref>
|group=17
|period=6
|block=p
|appearance=unknown, probably metallic
|image name=
|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
|phase=solid
|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=
|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=https://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|bibcode=2013NatCo...4E1835R }}</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.=
|magnetic susceptibility=
|magnetic susceptibility ref=
|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"
|QID=Q999
}}<!--

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