# برومين

Bromine,  35Br|  |
| عمومي خواص |
| Pronunciation |  /ˈbroʊmiːn/ or  /ˈbroʊmɪn/ BROH**-meen* or BROH**-min* |
| Appearance | reddish-brown |
|  |
| Bromine په دوراني جدول کې |
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 | Cl ↑ Br ↓  I
 |
| selenium ← bromine → krypton
 | ‍
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| اټومي شمیره (*Z*) | 35 |
| گروپ, پیریود | group 17 (halogens), period 4  |
| بلاک | p-block  |
| Element category |   diatomic nonmetal |
| معياري اټومي وزن (*A*r) | * [79.901, 79.907]
* conventional: 79.904
 |
| Electron configuration | [Ar] 3d10 4s2 4p5 |
| Electrons per shell | 2, 8, 18, 7 |
| فزیکي خواص |
| حالت (at STP) | مايع |
| دويلې کيدو ټکى | 265.8 K ​(−7.2 °C, ​19 °F)  |
| يشنا ټکی | 332.0 K ​(58.8 °C, ​137.8 °F)  |
| Density near r.t. | Br2, liquid: 3.1028 g/cm3 |
| Triple point | 265.90 K, ​5.8 kPa  |
| Critical point | 588 K, 10.34 MPa  |
| Heat of fusion | (Br2) 10.571 kJ/mol  |
| Heat of vaporisation | (Br2) 29.96 kJ/mol  |
| Molar heat capacity | (Br2) 75.69 J/(mol·K)  |
| **Vapour pressure**

| *P* (Pa) | 1
 | 10
 | 100
 | 1 k
 | 10 k
 | 100 k
 |
| --- | --- | --- | --- | --- | --- | --- |
| at *T* (K) | 185
 | 201
 | 220
 | 244
 | 276
 | 332
 |

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| اټومي خواص |
| Oxidation states | 7, **5**, 4, **3**, **1**, **−1** ​(a strongly acidic oxide) |
| Electronegativity | Pauling scale: 2.96  |
| Ionisation energies | * 1st: 1139.9 kJ/mol
* 2nd: 2103 kJ/mol
* 3rd: 3470 kJ/mol
*
 |
| Atomic radius | empirical: 120 pm  |
| Covalent radius | 120±3 pm  |
| Van der Waals radius | 185 pm  |
| Miscellanea |
| Crystal structure |  ​orthorhombicOrthorhombic crystal structure for bromine |
| Speed of sound | 206 m/s (at 20 °C) |
| د تودوخې تېرېدنه | 0.122 W/(m·K)  |
| Electrical resistivity | 7.8×1010 Ω·m (at 20 °C)  |
| Magnetic ordering | diamagnetic  |
| Magnetic susceptibility (*χ*mol) | −56.4·10−6 cm3/mol |
| CAS Number | 7726-95-6  |
| History |
| Discovery and first isolation | Antoine Jérôme Balard and Carl Jacob Löwig (1825) |
| Main isotopes of bromine |
|

| آيسو­ټوپ
 | Abun­dance
 | نیم ژوند (*t*1/2) | Decay mode
 | Pro­duct
 |
| --- | --- | --- | --- | --- |
| 79Br
 | 51%
 | stable
 |
| 81Br
 | 49%
 | stable
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**برومين** (په انگرېزي: *Bromine*) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د **Br** سمبول او ۳۵ اتمي شمېرې په وسیله ښودل شوی دی.

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