text: # Bèng
  Chăng-kō̤ Mìng-dĕ̤ng-ngṳ̄ Háng-cê gì bēng-buōng. / 參考閩東語漢字其版本。
  Bèng (硼) sê siŏh cṳ̄ng huá-hŏk nguòng-só.  Nguòng-cṳ̄ sê̤ṳ-só sê 5, huá-hŏk hù-hô̤ sê B.
title: Bèng
wikitext: {{twinLAT|硼}}
  {{infobox element
  |name=Bèng
  |laname=boron
  |alt name=
  |number=5
  |symbol=B
  |allotropes=α-, β-rhombohedral, β-tetragonal (and [[Allotropes of boron|more]])
  |left=[[Pì (gĭng-sṳ̆k)|berili]]
  |right=[[Táng]]
  |above=–
  |below=[[Lé̤ṳ]]
  |series=lôi-gĭng-sṳ̆k
  |series comment=
  |group=13
  |period=2
  |block=p
  |series color=
  |appearance=black-brown
  |image name=Boron R105.jpg
  |image size=
  |image name comment=boron (β-rhombohedral)<ref>[[#VanSetten2007|Van Setten]] et al. 2007, pp.&nbsp;2460–1</ref>
  |image name 2=
  |image name 2 comment=
  |atomic mass=10.81 
  |atomic mass ref=<ref name="CIAAW">[http://www.ciaaw.org/pubs/TSAW2013_xls.xls Conventional Atomic Weights 2013]. [[Commission on Isotopic Abundances and Atomic Weights]]</ref>
  |atomic mass 2=
  |atomic mass comment=(10.806–10.821)<ref name="IUPAC">[http://www.ciaaw.org/atomic-weights.htm Standard Atomic Weights 2013]. [[Commission on Isotopic Abundances and Atomic Weights]]</ref>
  |electron configuration=&#91;[[Helium|He]]&#93; 2s<sup>2</sup> 2p<sup>1</sup>
  |electrons per shell=2, 3
  |color=
  |phase=gó-tā̤
  |phase comment=
  |density gplstp=
  |density gpcm3nrt=
  |density gpcm3mp=2.08
  |melting point K=2349
  |melting point C=2076
  |melting point F=3769
  |boiling point K=4200
  |boiling point C=3927
  |boiling point F=7101
  |triple point K=
  |triple point kPa=
  |critical point K=
  |critical point MPa=
  |heat fusion=50.2
  |heat vaporization=508
  |heat capacity=11.087
  |vapor pressure 1=2348
  |vapor pressure 10=2562
  |vapor pressure 100=2822
  |vapor pressure 1 k=3141
  |vapor pressure 10 k=3545
  |vapor pressure 100 k=4072
  |vapor pressure comment=
  |crystal structure=rhombohedral
  |oxidation states='''3''', 2, 1, −1, −5
  |oxidation states ref=<ref name=v1>{{cite journal|url=http://bernath.uwaterloo.ca/media/125.pdf|title=Infrared Emission Spectroscopy of BF and AIF|author=Zhang, K.Q.; Guo, B.; Braun, V.; Dulick, M.; Bernath, P.F.|journal=J. Molecular Spectroscopy|volume=170|year=1995|page=82|doi=10.1006/jmsp.1995.1058|bibcode=1995JMoSp.170...82Z|accessdate=2018-06-03|archive-date=2012-01-11|archive-url=https://web.archive.org/web/20120111084341/http://bernath.uwaterloo.ca/media/125.pdf|deadurl=yes}}</ref><ref>{{cite article|url=https://www.deutsche-digitale-bibliothek.de/binary/KKUKEQ5AXZBNJVU7NJCHZB4UXT2HAGJE/full/1.pdf|author=Melanie Schroeder|title=Eigenschaften von borreichen Boriden und Scandium-Aluminium-Oxid-Carbiden|page=139|language=de}}</ref>
  |oxidation states comment=(a mildly [[acid]]ic oxide)
  |electronegativity=2.04
  |number of ionization energies=4
  |ionization energy 1=800.6
  |ionization energy 2=2427.1
  |ionization energy 3=3659.7
  |atomic radius=90
  |atomic radius calculated=
  |covalent radius=84±3
  |Van der Waals radius=192
  |magnetic ordering=[[diamagnetic]]
  |magnetic ordering ref=<ref name=magnet>{{cite book| url=http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf| title=Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics| publisher=CRC press| isbn=0849304814| year=2000| author=Lide, David R. (ed.)| accessdate=2018-06-03| archive-date=2012-01-12| archive-url=https://web.archive.org/web/20120112012253/http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf| deadurl=}}</ref>
  |electrical resistivity=
  |electrical resistivity at 0=
  |electrical resistivity at 20=~10<sup>6</sup>
  |thermal conductivity=27.4
  |thermal conductivity 2=
  |thermal diffusivity=
  |thermal expansion=
  |thermal expansion at 25=β form: 5&ndash;7
  |thermal expansion at 25 ref=<ref>{{cite journal |author=Holcombe Jr., C. E.; Smith, D. D.; Lorc, J. D.; Duerlesen, W. K.; Carpenter; D. A.|title=Physical-Chemical Properties of beta-Rhombohedral Boron |journal=High Temp. Sci. |volume=5 |issue=5 |pages=349–57 |date=October 1973}}</ref>
  |speed of sound=
  |speed of sound rod at 20=16,200
  |speed of sound rod at r.t.=
  |Young's modulus=
  |Shear modulus=
  |Bulk modulus=
  |Poisson ratio=
  |Mohs hardness= ~9.5
  |Vickers hardness=
  |Brinell hardness=
  |CAS number=7440-42-8
  |isotopes=
  {{Infobox element/isotopes stable | mn=10 | sym=B | na=19.9(7)% | n=5 |firstlinks=yes}}<ref name="NISTic">{{cite web|url=http://physics.nist.gov/cgi-bin/Compositions/stand_alone.pl| title=Atomic Weights and Isotopic Compositions for All Elements |author= |publisher=National Institute of Standards and Technology |accessdate=2008-09-21}}</ref>
  {{Infobox element/isotopes stable | mn=11 | sym=B | na=80.1(7)% | n=6 |firstlinks=no}}<ref name="NISTic"/> |isotopes comment=<sup>10</sup>B content may be as low as 19.1% and as high as 20.3% in natural samples. <sup>11</sup>B is the remainder in such cases.<ref>{{cite journal|doi=10.1007/BF02165219|title=Determination of boron in glass by neutron transmission method|year=1990|author=Szegedi, S.|journal=Journal of Radioanalytical and Nuclear Chemistry Letters|volume=146|pages=177|last2=Váradi|first2=M.|last3=Buczkó|first3=Cs. M.|last4=Várnagy|first4=M.|last5=Sztaricskai|first5=T.|issue=3}}</ref>
  |predicted by=
  |prediction date=
  |discovered by=[[Joseph Louis Gay-Lussac]] and [[Louis Jacques Thénard]]<ref name="Lussac">{{cite journal|author=Gay Lussac, J.L. and Thenard, L.J. |year=1808|url=http://books.google.com/books?id=e6Aw616K5ysC&pg=PA169|title=Sur la décomposition et la recomposition de l'acide boracique|journal=Annales de chimie|volume=68|pages=169–174}}</ref>
  |discovery date=30 June 1808
  |first isolation by=[[Humphry Davy]]<ref name="Davy">{{cite journal|author=Davy H|year=1809|title=An account of some new analytical researches on the nature of certain bodies, particularly the alkalies, phosphorus, sulphur, carbonaceous matter, and the acids hitherto undecomposed: with some general observations on chemical theory|url=http://books.google.com/books?id=gpwEAAAAYAAJ&pg=PA140|journal=Philosophical Transactions of the Royal Society of London|volume=99|pages=39–104|doi=10.1098/rstl.1809.0005 }}</ref>
  |first isolation date=9 July 1808
  |history comment label=
  |history comment=
  }}
  '''Bèng''' (硼) sê siŏh cṳ̄ng [[huá-hŏk nguòng-só]].  [[Nguòng-cṳ̄ sê̤ṳ-só]] sê 5, huá-hŏk hù-hô̤ sê B.
  ==Huá-hŏk séng-cék==
  
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  [[分類:Huá-hŏk nguòng-só]]