# Boor

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|  Täkst aw mooringer frasch |

SIMS späktrum foon da isotoope

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He 2s2 2p1
5
B
Perioodesüsteem Klik aw sün latje blook for en ouder elemänt |

 |
| Ålgemiin |
| Noome, Sümbool, Ordenstål | Bor, B, 5 |
| Seerie | Hoolichmetalle |
| Gruppe, Perioode, Blook | 13, 2, p |
| Ütsiien | swot |
| Mase-önjdiilj önj e wrålhüle | 1 · 10−3 % |
| Atomaar |
| Atommasse | 10,811 u |
| Atomradius (beräägned) | 85 (87) pm |
| Kovalenten Radius | 82 pm |
| Elektroonekonfigurasjoon | He 2s2 2p1 |
| Elektrone pro Energieniveau | 2, 3 |
| 1. Ionisierungsenergie | 800,6 kJ/mol |
| 2. Ionisierungsenergie | 2427,1 kJ/mol |
| 3. Ionisierungsenergie | 3659,7 kJ/mol |
| Füüsikaalisch |
| Agregaattustånd | fest |
| Kristallstruktur | rhomboedrisk |
| Tächte | 2,460 g/cm3 |
| Mohshärte | 9,3 |
| Smultpunkt | 2349 K (2076 °C) |
| Sjoodepunkt | 4200 K (3927 °C) |
| Molar Volumen | 4,39 · 10−6 m3/mol |
| Ferdåmpingswårmk | 489,7 kJ/mol |
| Smultwårmk | 50,2 kJ/mol |
| Dåmpdrük | 0,348 Pa bei 2573 K |
| Schålgauihäid | 16200 m/s bei 293,15 K |
| Spetsiifisch wårmkkapatsiteet | 1026 J/(kg • K) |
| Elektrisch liidjefjardihäid | 1,0 · 10−4 S/m |
| Wårmkliidjefjardihäid | 27,4 W/(m • K) |
| Kemisch |
| Oksidasjoonstustånde | 3 |
| Oxide (Basizität) | B2O3 (licht suur) |
| Normåålpotentsjåål |  |
| Elektronegativiteet | 2,04 (Pauling-Skala) |
| Isotoope |
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| Isotop | NH | t1/2 | ZM | ZE MeV | ZP |
| --- | --- | --- | --- | --- | --- |
| 8B |
{syn.}
 |  770 ms  | ε | 17,979 | 8Be |
| 9B |
{syn.}
 |  8,465 · 10−19 s  | p | 0,185 | 8Be |
| 10B |
19,9 %
 |  Stabil |
| 11B | **80,1** %
 |  Stabil |
| 12B |
{syn.}
 |  20,20 ms  | β- | 13,369 | 12C |
| 13B |
{syn.}
 |  17,36 ms  | β- | 13,437 | 13C |

 |
| Mör Isotoope sii Liste foon Isotoope. |
| NMR-Äinschape |
|

|   | Spin | γ in rad·T−1·s−1 | E | fL bei B = 4,7 T in MHz |
| --- | --- | --- | --- | --- |
| **10B** | 3 | 2,875 · 107 |  | 21,5 |
| **11B** | 3/2 | 8,584 · 107 |  | 64,2 |

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| Sääkerhäidshaanewisinge |
| Gefåårstufkåntiikning |
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| Gesundheits- schädlich |
| (Xn) |

 |
| R- än S-Seetinge | R: 22 |
| S: 22 |
| Süwid möölik än gebrüklik, wårde SI-iinjhäide ferwånd. Wan ai ouers fermårked, jüle da önjjääwene dooten bai ståndardbetängelse. |

**Boor** unti  **Borium** as en keemisch elemänt ma sümbool B än atoomnumer 5. Dåt as en suurt metaloid.

## Önjtdäking

Boorferbininge wjarn ål önj dåt åler bekånd. Di noome kamt foon dåt arabisch *Buraq* for booraks, en minerool dåt dåt wichtiest ärts for e boorgewuning as. booraks as en boråt, en sålt foon boorsör. Dåt elemänt as deerüt ai sü iinjfåch fritumåågen, ouerdåt deerfor starke reduktoore nösi san, ås magnesium unti aluminium. Dåt elemänt wörd deeram jarst 1808 foon Sir Humphry Davy, Louis Gay-Lussac än Louis Jacques Thénard deerståld. Aw jüdeer wise wårt dåt boor ouers mjuksi mååged döör dåt metal. Döör ütenouderhåålen foon flüchtie halogenide koon dåt elemänt ouers ma lait mjuks deerståld wårde.

## Önjwiinjing

Boorsör wårt foole önjwånd önj e täkstiiilindustrii. Boorsilikåtglääse san tächnisch ordi wichti. Önj iiljwärk jeeft deertufäiging foon dåt elemänt önj amorf form en smuk gräin blai. Boorferbininge wårde unersoocht än önjwånd önj en briidj späktrum foon biokeemische såågen, ås sukerdöörlätjende mämbrååne, sänsoore for koolehüdrååte, bekämping foon artriitis än önj e neutrooneterapii. 10B heet en grute werkingstwassnaas for neutroonefångst än wårt deeram uk önj e atoomindustrii önjwånd. Boraane san wälj forsloin ås rakeeteiiljinge, ouerdåt bai dåt ferbrånen deerfoon en grut mase enärgii fri wårt. Boor as wider önj bästi riin form wichti ås "mjuks" (dope) önj huulewliidjere.

kristaliin boor
## Referänse