បរ

Boron
5B
Hydrogen (diatomic nonmetal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline earth metal)
Boron (metalloid)
Carbon (polyatomic nonmetal)
Nitrogen (diatomic nonmetal)
Oxygen (diatomic nonmetal)
Fluorine (diatomic nonmetal)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline earth metal)
Aluminium (other metals)
Silicon (metalloid)
Phosphorus (polyatomic nonmetal)
Sulfur (polyatomic nonmetal)
Chlorine (diatomic nonmetal)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline earth metal)
Scandium (transition metal)
Titanium (transition metal)
Vanadium (transition metal)
Chromium (transition metal)
Manganese (transition metal)
Iron (transition metal)
Cobalt (transition metal)
Nickel (transition metal)
Copper (transition metal)
Zinc (transition metal)
Gallium (other metals)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (polyatomic nonmetal)
Bromine (diatomic nonmetal)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline earth metal)
Yttrium (transition metal)
Zirconium (transition metal)
Niobium (transition metal)
Molybdenum (transition metal)
Technetium (transition metal)
Ruthenium (transition metal)
Rhodium (transition metal)
Palladium (transition metal)
Silver (transition metal)
Cadmium (transition metal)
Indium (other metals)
Tin (other metals)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (diatomic nonmetal)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline earth metal)
Lanthanum (lanthanide)
Cerium (lanthanide)
Praseodymium (lanthanide)
Neodymium (lanthanide)
Promethium (lanthanide)
Samarium (lanthanide)
Europium (lanthanide)
Gadolinium (lanthanide)
Terbium (lanthanide)
Dysprosium (lanthanide)
Holmium (lanthanide)
Erbium (lanthanide)
Thulium (lanthanide)
Ytterbium (lanthanide)
Lutetium (lanthanide)
Hafnium (transition metal)
Tantalum (transition metal)
Tungsten (transition metal)
Rhenium (transition metal)
Osmium (transition metal)
Iridium (transition metal)
Platinum (transition metal)
Gold (transition metal)
Mercury (transition metal)
Thallium (other metals)
Lead (other metals)
Bismuth (other metals)
Polonium (other metals)
Astatine (metalloid)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline earth metal)
Actinium (actinide)
Thorium (actinide)
Protactinium (actinide)
Uranium (actinide)
Neptunium (actinide)
Plutonium (actinide)
Americium (actinide)
Curium (actinide)
Berkelium (actinide)
Californium (actinide)
Einsteinium (actinide)
Fermium (actinide)
Mendelevium (actinide)
Nobelium (actinide)
Lawrencium (actinide)
Rutherfordium (transition metal)
Dubnium (transition metal)
Seaborgium (transition metal)
Bohrium (transition metal)
Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Ununtrium (unknown chemical properties)
Flerovium (unknown chemical properties)
Ununpentium (unknown chemical properties)
Livermorium (unknown chemical properties)
Ununseptium (unknown chemical properties)
Ununoctium (unknown chemical properties)


B

Al
beryllium ← boron → carbon
Boron នៅក្នុងតារាងខួបនៃធាតុគីមី
រូបរាង
black-brown

boron (β-rhombohedral)[១]
លក្ខណៈទូទៅ
ឈ្មោះ, និមិត្តសញ្ញា, លេខboron, B, 5
Pronunciation//
ក្រុម, ខួប, block13, 2, p
ទម្ងន់អាតូម kJ·mol−1
Atomic radius90 pm
Covalent radius84±3 pm
Van der Waals radius192 pm
Miscellanea
ទម្រង់គ្រីស្តាលrhombohedral
Magnetic orderingdiamagnetic
Electrical resistivity(20 °C) ~106Ω·m
Thermal conductivity27.4 W·m−1·K−1
Thermal expansion(25 °C) β form: 5–7 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[២] (30 June 1808)
First isolationHumphry Davy[៣] (9 July 1808)
Most stable isotopes
Main article: Isotopes of boron
isoNAhalf-lifeDMDE (MeV)DP

ទំព័រគំរូ:Infobox element/isotopes stable[៤]ទំព័រគំរូ:Infobox element/isotopes stable[៤]

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.[៥]
·

Boron is a chemical element with symbol B and atomic number 5. Produced entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it is a low-abundance element in the Solar system and in the Earth's crust.[៦] Boron is concentrated on Earth by the water-solubility of its more common naturally occurring compounds, the borate minerals. These are mined industrially as evaporites, such as borax and kernite. The largest known boron deposits are in Turkey, the largest producer of boron minerals.

Elemental boron is a metalloid that is found in small amounts in meteoroids but chemically uncombined boron is not otherwise found naturally on Earth. Industrially, very pure boron is produced with difficulty because of refractory contamination by carbon or other elements. Several allotropes of boron exist: amorphous boron is a brown powder; crystalline boron is silvery to black, extremely hard (about 9.5 on the Mohs scale), and a poor electrical conductor at room temperature. The primary use of elemental boron is as boron filaments with applications similar to carbon fibers in some high-strength materials.

Boron is primarily used in chemical compounds. About half of all consumption globally, boron is used as an additive in glass fibers of boron-containing fiberglass for insulation and structural materials. The next leading use is in polymers and ceramics in high-strength, lightweight structural and refractory materials. Borosilicate glass is desired for its greater strength and thermal shock resistance than ordinary soda lime glass. Boron compounds are used as fertilizers in agriculture and in sodium perborate bleaches. A small amount of boron is used as a dopant in semiconductors, and reagent intermediates in the synthesis of organic fine chemicals. A few boron-containing organic pharmaceuticals are used or are in study. Natural boron is composed of two stable isotopes, one of which (boron-10) has a number of uses as a neutron-capturing agent.

In biology, borates have low toxicity in mammals (similar to table salt), but are more toxic to arthropods and are used as insecticides. Boric acid is mildly antimicrobial, and several natural boron-containing organic antibiotics are known.[៧] Boron is essential to life. Small amounts of boron compounds play a strengthening role in the cell walls of all plants, making boron a necessary plant nutrient. Boron is involved in the metabolism of calcium in both plants and animals. It is considered an essential nutrient for humans, and boron deficiency is implicated in osteoporosis.

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
Fiji Hindi: Boron
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)
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: