ଛାଞ୍ଚ:Infobox boron

Boron, ₅B
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	boron, B
Appearance	black-brown
ଉଚ୍ଚାରଣ	/ˈbɔːrɒn/
Boron in the periodic table
	beryllium ← boron → carbon
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	5
ଶ୍ରେଣୀ, ବ୍ଳକ	group 13, p-block
ପର୍ଯ୍ୟାୟ	period 2
ମୌଳିକ ପ୍ରକାର	metalloid
ମାନକ ପରମାଣବିକ ଓଜନ (±) (Ar)	10.81(1)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[He] 2s2 2p1
per shell	2, 3
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	solid
ଗଳନାଙ୍କ	2349 K (2076 °C, 3769 °F)
ସ୍ଫୁଟନାଙ୍କ	4200 K (3927 °C, 7101 °F)
Density when liquid, at m.p.	2.08 g/cm3
Heat of fusion	50.2 kJ/mol
Heat of	480 kJ/mol
Molar heat capacity	11.087 J/(mol·K)
Atomic properties
Oxidation states	3, 2, 1 mildly acidic oxide
Electronegativity	Pauling scale: 2.04
energies	; (more)
Atomic radius	empirical: 90 pm
Covalent radius	84±3 pm
Van der Waals radius	192 pm
Miscellanea
Crystal structure	rhombohedral
Speed of sound thin rod	16,200 m/s (at 20 °C)
Thermal expansion	(β form) 5–7 µm/(m·K) (at 25 °C)
Thermal conductivity	27.4 W/(m·K)
Electrical resistivity	~106 Ω·m (at 20 °C)
Magnetic ordering	diamagnetic
Mohs hardness	~9.5
CAS Number	7440-42-8
ଇତିହାସ
ଆବିଷ୍କାର	Joseph Louis Gay-Lussac and Louis Jacques Thénard (30 June 1808)
First isolation	Humphry Davy (9 July 1808)
Most stable isotopes of boron
	Boron-10 content may be as low as 19.1% and as; high as 20.3% in natural samples. Boron-11 is; the remainder in such cases.;
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References

These references will appear in the article, but this list appears only on this page.

↑ Zhang, K.Q.; Guo, B.; Braun, V.; Dulick, M.; Bernath, P.F. (1995). "Infrared Emission Spectroscopy of BF and AIF" (PDF). J. Molecular Spectroscopy. 170: 82. Bibcode:1995JMoSp.170...82Z. doi:10.1006/jmsp.1995.1058.{{cite journal}}: CS1 maint: multiple names: authors list (link)
↑ Holcombe Jr., C. E.; Smith, D. D.; Lorc, J. D.; Duerlesen, W. K.; Carpenter; D. A. (October 1973). "Physical-Chemical Properties of beta-Rhombohedral Boron". High Temp. Sci. 5 (5): 349–57.{{cite journal}}: CS1 maint: multiple names: authors list (link)
↑ Lide, David R. (ed.) (2000). Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics (PDF). CRC press. ISBN 0849304814. {{cite book}}: |author= has generic name (help)
↑ Gay Lussac, J.L. and Thenard, L.J. (1808) "Sur la décomposition et la recomposition de l'acide boracique," Annales de chimie [later: Annales de chemie et de physique], vol. 68, pp. 169–174.
↑ Davy H (1809). "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". Philosophical Transactions of the Royal Society of London. 99: 33–104.
↑ ^୬.୦ ^୬.୧ "Atomic Weights and Isotopic Compositions for All Elements". National Institute of Standards and Technology. Retrieved 2008-09-21.
↑ Szegedi, S.; Váradi, M.; Buczkó, Cs. M.; Várnagy, M.; Sztaricskai, T. (1990). "Determination of boron in glass by neutron transmission method". Journal of Radioanalytical and Nuclear Chemistry Letters. 146 (3): 177. doi:10.1007/BF02165219.

[v1-1] Zhang, K.Q.; Guo, B.; Braun, V.; Dulick, M.; Bernath, P.F. (1995). "Infrared Emission Spectroscopy of BF and AIF" (PDF). J. Molecular Spectroscopy. 170: 82. Bibcode:1995JMoSp.170...82Z. doi:10.1006/jmsp.1995.1058.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[2] Holcombe Jr., C. E.; Smith, D. D.; Lorc, J. D.; Duerlesen, W. K.; Carpenter; D. A. (October 1973). "Physical-Chemical Properties of beta-Rhombohedral Boron". High Temp. Sci. 5 (5): 349–57.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[magnet-3] Lide, David R. (ed.) (2000). Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics (PDF). CRC press. ISBN 0849304814. {{cite book}}: |author= has generic name (help)

[Lussac-4] Gay Lussac, J.L. and Thenard, L.J. (1808) "Sur la décomposition et la recomposition de l'acide boracique," Annales de chimie [later: Annales de chemie et de physique], vol. 68, pp. 169–174.

[Davy-5] Davy H (1809). "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". Philosophical Transactions of the Royal Society of London. 99: 33–104.

[NISTic-6] ୬.୦ ^୬.୧ "Atomic Weights and Isotopic Compositions for All Elements". National Institute of Standards and Technology. Retrieved 2008-09-21.

[7] Szegedi, S.; Váradi, M.; Buczkó, Cs. M.; Várnagy, M.; Sztaricskai, T. (1990). "Determination of boron in glass by neutron transmission method". Journal of Radioanalytical and Nuclear Chemistry Letters. 146 (3): 177. doi:10.1007/BF02165219.

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