வார்ப்புரு:தகவற்சட்டம் போரான்
{{Elementbox
 |name=போரான்
 |other name=boron
 |number=5
 |symbol=B
 |pronounce={{IPAc-en|ˈ|b|ɔr|ɒ|n}}
 |left=[[பெரிலியம்]]
 |right=[[காபன்]]
 |above=-
 |below=[[அலுமினியம்|Al]]
 |series=metalloid
 |series comment=
 |group=13
 |period=2
 |block=p
 |series color=
 |phase color=
 |appearance=black-brown
 |image name=Boron mNACTEC.jpg
 |image size=
 |image name comment=
 |image name 2=
 |image name 2 comment=
 |atomic mass=10.811
 |atomic mass 2=7
 |atomic mass comment=
 |electron configuration=[He] 2s&lt;sup&gt;2&lt;/sup&gt; 2p&lt;sup&gt;1&lt;/sup&gt;
 |electrons per shell=2, 3
 |color=
 |phase=திண்மம்
 |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=480
 |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&lt;ref name=v1&gt;{{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 }}&lt;/ref&gt;
 |oxidation states comment=mildly [[acid]]ic oxide
 |electronegativity=2.04
 |number of ionization energies=4
 |1st ionization energy=800.6
 |2nd ionization energy=2427.1
 |3rd ionization energy=3659.7
 |atomic radius=[[1 E-11 m|90]]
 |atomic radius calculated=
 |covalent radius=[[1 E-11 m|84±3]]
 |Van der Waals radius=[[1 E-10 m|192]]
 |magnetic ordering=[[diamagnetic]]&lt;ref name=magnet&gt;{{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.)}}&lt;/ref&gt;
 |electrical resistivity=
 |electrical resistivity at 0=
 |electrical resistivity at 20=~10&lt;sup&gt;6&lt;/sup&gt;&amp;nbsp;
 |thermal conductivity=27.4
 |thermal conductivity 2=
 |thermal diffusivity=
 |thermal expansion=
 |thermal expansion at 25=(ß form) 5&amp;ndash;7&lt;ref&gt;{{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}}&lt;/ref&gt;
 |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=
 {{Elementbox_isotopes_stable | mn=10 | sym=B | na=19.9(7)%* | n=5 }}&lt;ref name=&quot;NISTic&quot;&gt;{{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}}&lt;/ref&gt;
 {{Elementbox_isotopes_stable | mn=11 | sym=B | na=80.1(7)%* | n=6 }}&lt;ref name=&quot;NISTic&quot;/&gt; |isotopes comment=*&lt;small&gt;Boron-10 content may be as low as 19.1% and as&lt;br /&gt;high as 20.3% in natural samples. Boron-11 is&lt;br /&gt;the remainder in such cases.&lt;/small&gt;&lt;ref&gt;{{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}}&lt;/ref&gt;
 |predicted by=
 |prediction date=
 |discovered by=[[Joseph Louis Gay-Lussac|{{nowrap|J. Gay-Lussac}}]] &amp; [[Louis Jacques Thénard|{{nowrap|L. Thénard}}]]&lt;ref name=&quot;Lussac&quot;&gt;Gay Lussac, J.L. and Thenard, L.J. (1808) [http://books.google.com/books?id=e6Aw616K5ysC&amp;pg=PA169#v=onepage&amp;q&amp;f=false &quot;Sur la décomposition et la recomposition de l'acide boracique,&quot;] ''Annales de chimie'' [later: Annales de chemie et de physique], vol. 68, pp. 169–174.&lt;/ref&gt;
 |discovery date=June 30 1808
 |first isolation by=[[Humphry Davy|H. Davy]]&lt;ref name=&quot;Davy&quot;&gt;{{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&amp;pg=PA140#v=onepage&amp;q&amp;f=false|journal = Philosophical Transactions of the Royal Society of London|volume = 99|pages = 33–104}}&lt;/ref&gt;
 |first isolation date=July 9 1808
 |history comment label=
 |history comment=
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 [[பகுப்பு:தனிம அட்டவணை தகவற்சட்ட வார்ப்புருக்கள்]]