Boron

Boron
5B
-

B

Al
boroncarbon
Boron in the periodic table
Appearance
black-brown

Boron, shown here in the form of its β-rhombohedral phase (its most thermodynamically stable allotrope)[1]
General properties
Name, symbol, numberboron, B, 5
Pronunciation /ˈbɔərɒn/
Element categorymetalloid
Group, period, blockTemplate:Infobox element/group, 2, p
Standard atomic weight10.81(1)
Electron configuration[He] 2s2 2p1
2, 3
Physical properties
Phasesolid
Liquid density at m.p.2.08 g·cm−3
Melting point2349 K, 2076 °C, 3769 °F
Boiling point4200 K, 3927 °C, 7101 °F
Heat of fusion50.2
[[Enthalpy of vaporization|Heat of Template:Engvar]]508 kJ·mol−1
Molar heat capacity11.087 J·mol−1·K−1
[[Vapor pressure|Template:Engvar pressure]]
P (Pa)1101001 k10 k100 k
at T (K)234825622822314135454072
Atomic properties
Oxidation states3, 2, 1[2]
(mildly acidic oxide)
Electronegativity2.04 (Pauling scale)
[[ionization energy|Template:Engvar energies]]
(more)
1st: 800.6 kJ·mol−1
2nd: 2427.1 kJ·mol−1
3rd: 3659.7 kJ·mol−1
Atomic radius90 pm
Covalent radius84±3 pm
Van der Waals radius192 pm
Miscellanea
Crystal structureTemplate:Infobox element/crystal structure wikilink
Magnetic orderingdiamagnetic[3]
Electrical resistivity(20 °C) ~106 Ω·m
Thermal conductivity27.4 W·m−1·K−1
Thermal expansion(25 °C) (β form) 5–7[4] µm·m−1·K−1
Speed of sound (thin rod)(20 °C) 16,200 m·s−1
Mohs hardness~9.5
CAS registry number7440-42-8
History
DiscoveryJoseph Louis Gay-Lussac and Louis Jacques Thénard[5] (30 June 1808)
First isolationHumphry Davy[6] (9 July 1808)
Most stable isotopes
Main article: Isotopes of boron
isoNAhalf-lifeDMDE (MeV)DP

Template:Elementbox isotopes stable[7]Template:Elementbox isotopes stable[7]

10B content may be as low as 19.1% and as high as 20.3% in natural samples. 11B is the remainder in such cases.[8]
·
Boron in a tube

Boron ek chemical element hae jiske chemical symbol B, aur atomic number 5 hae.

Chhapa ke gallery

Other Languages
Afrikaans: Boor (element)
አማርኛ: ቦሮን
aragonés: Boro
العربية: بورون
asturianu: Boru
azərbaycanca: Bor
беларуская (тарашкевіца)‎: Бор (элемэнт)
български: Бор (елемент)
भोजपुरी: बोरॉन
বাংলা: বোরন
བོད་ཡིག: ཚ་ནག
brezhoneg: Bor
bosanski: Bor (element)
català: Bor
Mìng-dĕ̤ng-ngṳ̄: Bèng
Cebuano: Boro
کوردی: بۆرۆن
corsu: Boru
čeština: Bor (prvek)
Чӑвашла: Бор (элемент)
Cymraeg: Boron
Deutsch: Bor
ދިވެހިބަސް: ބޯރޯން
Ελληνικά: Βόριο
English: Boron
Esperanto: Boro
español: Boro
eesti: Boor
euskara: Boro
فارسی: بور
suomi: Boori
français: Bore
Nordfriisk: Boor
furlan: Bôr
Gaeilge: Bórón
Gagauz: Bor
Gàidhlig: Bòron
galego: Boro
ગુજરાતી: બોરોન
Gaelg: Boron
客家語/Hak-kâ-ngî: Phìn
Hawaiʻi: Boron
עברית: בור (יסוד)
हिन्दी: बोरॉन
hrvatski: Bor (element)
magyar: Bór
interlingua: Boro
Bahasa Indonesia: Boron
Ido: Borono
íslenska: Bór
italiano: Boro
日本語: ホウ素
Patois: Buoran
la .lojban.: jicmrboro
Basa Jawa: Boron
ქართული: ბორი
Kabɩyɛ: Bɔrɩ
Gĩkũyũ: Boron
қазақша: Бор (элемент)
ភាសាខ្មែរ: បរ
ಕನ್ನಡ: ಬೊರಾನ್
한국어: 붕소
kurdî: Bor
коми: Бор
Кыргызча: Бор (элемент)
Latina: Borium
Lëtzebuergesch: Bor
Limburgs: Boor
Ligure: Boro
lumbaart: Boro
lingála: Bolo
lietuvių: Boras
latviešu: Bors
Māori: Pūtiwha
македонски: Бор (елемент)
മലയാളം: ബോറോൺ
मराठी: बोरॉन
кырык мары: Бор (элемент)
Bahasa Melayu: Boron
မြန်မာဘာသာ: ဘိုရွန်
Nāhuatl: Xacoiztatl
Plattdüütsch: Bor (Element)
नेपाली: बोरोन
नेपाल भाषा: बोरोन
Nederlands: Boor (element)
norsk nynorsk: Grunnstoffet bor
Novial: Bore
occitan: Bòr
Livvinkarjala: Borum
ଓଡ଼ିଆ: ବୋରନ
ਪੰਜਾਬੀ: ਬੋਰਾਨ
पालि: बोरोन
polski: Bor
Piemontèis: Bòr
پنجابی: بورون
português: Boro
Runa Simi: Boru
română: Bor (element)
armãneashti: Boru
русский: Бор (элемент)
संस्कृतम्: बोरान
sicilianu: Boru
Scots: Boron
srpskohrvatski / српскохрватски: Bor (element)
සිංහල: බෝරෝන්
Simple English: Boron
slovenčina: Bór
slovenščina: Bor (element)
Soomaaliga: Booron
shqip: Bori
Seeltersk: Bor
Basa Sunda: Boron
svenska: Bor
Kiswahili: Boroni
தமிழ்: போரான்
తెలుగు: బోరాన్
тоҷикӣ: Бор (унсур)
ไทย: โบรอน
Tagalog: Boron
Türkçe: Bor
татарча/tatarça: Бор (элемент)
ئۇيغۇرچە / Uyghurche: بور
українська: Бор
oʻzbekcha/ўзбекча: Bor (unsur)
vepsän kel’: Bor (himine element)
Tiếng Việt: Bo
Winaray: Boro
吴语:
хальмг: Борон
Yorùbá: Bórọ̀nù
中文:
文言:
Bân-lâm-gú: Phêng-sò͘
粵語: