# බෝරෝන්

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| බෙරිලියම් ← **බෝරෝන්** → කාබන් |
| - ↑ **B** ↓ Al |

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**5B**
ආවර්තිතා වගුව |

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| මුහුණුවර |
| black-brown  |
| ප්‍රධාන ගුණ |
| නම, සංකේතය, ක්‍රමාංකය | බෝරෝන්, B, 5 |
| උච්චාරණය | /ˈbɔrɒn/ |
| මූලද්‍රව්‍ය කාණ්ඩය | metalloid |
| කාණ්ඩය, ආවර්තය, ගොනුව | 13, 2, p |
| සාපේක්ෂ පරමාණුක ස්කන්ධය | 10.811(7) g·mol−1 |
| ඉලෙක්ට්‍රෝන වින්‍යාසය | [He] 2s2 2p1 |
| කවච වල ඇති ඉලෙක්ට්‍රෝන සංඛ්‍යාව | 2, 3 |
| ද්‍රව්‍යමය ගුණ |
| අවධිය | solid |
| ද්‍රවාංකයේ දී ද්‍රව ඝනත්වය | 2.08 g·cm−3 |
| ද්‍රවාංකය | 2349 K, 2076 °C, 3769 °F |
| තාපාංකය | 4200 K, 3927 °C, 7101 °F |
| විලයන එන්තැල්පිය | 50.2 kJ·mol−1 |
| වාෂ්පීභවන එන්තැල්පිය | 480 kJ·mol−1 |
| විශිෂ්ට තාප ධාරිතාව | (25 °C) 11.087 J·mol−1·K−1 |
| වාෂ්ප පීඩනය |
|

|  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- |
| පීඩ. (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
| උෂ්. (K) | 2348 | 2562 | 2822 | 3141 | 3545 | 4072 |

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| පරමාණුක ගුණ |
| ඔක්සිකරණ අංකය | **3**, 2, 1 (mildly acidic oxide) |
| විද්‍යුත් ඍණතාව | 2.04 (පෝලිං පරිමාණයෙන්) |
| අයනීකරණ ශක්ති | 1වන: 800.6 kJ·mol−1 |
| 2වන: 2427.1 kJ·mol−1 |
| 3වන: 3659.7 kJ·mol−1 |
| පරමාණුක අරය | 90 pm |
| සහසංයුජ අරය | 84±3 pm |
| වැන්ඩ වාල්ස් අරය | 192 pm |
| ප්‍රකීර්ණක |
| චුම්බකත්වය | diamagnetic |
| විද්‍යුත් ප්‍රතිරෝධිතාව | (20 °C) ~106 Ω·m |
| තාප සන්නායකතාව | (300 K) 27.4 W·m−1·K−1 |
| තාප ප්‍රසාරණය | (25 °C) (ß form) 5–7 µm·m−1·K−1 |
| ධ්වනි වේගය (තුනී දණ්ඩක් හරහා) | (20 °C) 16,200 m/s |
| මෝ දැඩියාව | ~9.5 |
| CAS ලේඛනගත අංකය | 7440-42-8 |
| ඉතාමත් ස්ථායී සමස්ථානික |
| ප්‍රධාන ලිපිය: බෝරෝන් වල සමස්ථානික |
|

| සමස්. | ස්.සු. | අර්ධ ජීව කාලය | ක්.නිය. | ක්.ශ. (MeV) | ක්.නිශ්. |
| --- | --- | --- | --- | --- | --- |
| 10B | 19.9(7)%\* | 10B is stable with 5 neutrons |
| 11B | 80.1(7)%\* | 11B is stable with 6 neutrons |
| \*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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| * v
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**බෝරෝන්** යනු රසායනික මූලද්‍රව්‍යයකි. එහි සංකේතය B වන අතර පරමාණුක ක්‍රමාංකය 5 වේ. බෝරෝන් නිපදවීම cosmic ray spallation සහ supernovae ක්‍රියාවලි වලින් පමණක් වන අතර කිසිවිටකත් stellar nucleosynthesis මගින් සිදුනොවේ. සෞරග්‍රහ මණ්ඩලයේ සහ පෘථිවි පෘෂ්ඨය මත බෝරෝන් දුලබ මූලද්‍රව්‍යයක් වේ.
තුර්කිය, ලොව දැනට සොයාගෙන ඇති විශාලතම බෝරෝන් නිධියට හිමිකම් කියන අතර ලොව විශාලතම බෝරෝන් නිෂ්පාදකයා ද වේ.

## මූලාශ්‍ර

## බාහිර සබැඳි

* The Periodic Table of Videos video of Boron at YouTube
* Boron
* WebElements.com – Boron
* National Pollutant Inventory – Boron and compounds