خصائص

CAS Number7726-95-6
PubChem CID24408
نصف قطر ذري١٢٠
الحجم الذري٢٣٫٥
الكتلة الذرية٧٩٫٩٠٤
المستوى الفرعيp
نقطة الغليان٥٨٫٨
Bulk Modulus
الفئةهالوجينات
البنية البلوريةمعين متعامد مركزي القاعدة
اللونأحمر
نصف قطر تساهمي١٢٠
كثافة٣٫١٢٢
Electrical Resistivity
توزيع إلكتروني[Ar] 3d10 4s2 4p5
توزيع الإلكترونات لكل غلاف تكافؤ2, 8, 18, 7
الكهرسلبية٢٫٩٦
Electrons35
المجموعة17
حرارة الانصهار٥٫٨
حرارة التبخر١٤٫٨
جهد التأين١١٫٨١٤
Magnetic Ordering
Magnetic Susceptibility
كتلة٧٩٫٩٠٤
Mass Number35
نقطة الانصهار؜-٧٫٢
الاسمبروم
النيوترونات45
عدد ذري80
أرقام الأكسدة-1, 1, 3, 4, 5, 7
الدوري4
الطورسائل
Poisson Ratio
البروتونات35
Shear Modulus
السعة الحرارية٠٫٤٧٤
الرمزBr
الناقلية الحرارية٠٫٠٠١
Van der Waals radius
Young's Modulus
الوفرة
متوفر في قشرة الأرض0.0003%
متوفر بشكل عام7×10-7%
Br بروم 35 79.904 17 4 p 35 -7.2 58.8 [Ar] 4s2 3d10 4p5 2 8 18 7 3.12 0.0003% Red Orthorhombic 3.0 2.685 {"1":"1139.9","2":"2103","3":"3470","4":"4560","5":"5760","6":"8550","7":"9940","8":"18600"} 1140 324.6 114 ±1,+5 1.12 23.5 5.286 14.725 0.226 0.122 0 Liquid, Diamagnetic, Insulator, Halogen, Nonmetal, Stable, Natural BRO-meen Redish-brown liquid. It was once used in large quantities to make a compound that removed lead compound build up in engines burning leaded gasoline. Now it is primarily used in dyes, disinfectants, and photographic chemicals. Occurs in compounds in sea water. Slt3_5upuSs Bromine
In 1797, Louis Nicolas Vauquelin received samples of crocoite ore.

In 1798, Vauquelin discovered that he could isolate metallic chromium by heating the oxide in a charcoal oven, making him the discoverer of the element.

Vauquelin was also able to detect traces of chromium in precious gemstones, such as ruby or emerald. From the Greek word chroma, color 35 1826 Antoine-J. Balard France From the Greek word "bromos" meaning "stench"

Isotopes of Chromium

Standard Atomic Weight

[79.901,79.707]

النظائر المستقرة

79Br 81Br

النظائرغير المستقرة

67Br 68Br 69Br 70Br 71Br 72Br 73Br 74Br 75Br 76Br 77Br 78Br 80Br 82Br 83Br 84Br 85Br 86Br 87Br 88Br 89Br 90Br 91Br 92Br 93Br 94Br 95Br 96Br 97Br

In larger amounts, chromium can be toxic and carcinogenic
Chromium oxide was used by the Chinese in the Qin dynasty over 2,000 years ago
Chromium is used to harden steel, manufacture stainless steel, and form many useful alloys.

It is mostly used in plating to produce a hard, beautiful surface and to prevent corrosion.

The metal is also widely used as a catalyst.

Chromium compounds are valued as pigments for their vivid green, yellow, red and orange colors.