Bromine Elemental Symbol

French German Italian Portuguese Spanish Swedish
Brome Brom Bromo Bromo Bromo Brom

Bromine Element SymbolBromine is a Block P, Group 17, Period 4 element. Its electron configuration is [Ar]4s23d104p5. The bromine atom has a radius of 102 pm and its Van der Waals radius is 183 pm. In its elemental form, CAS 7726-95-6, bromine has a red-brown appearance. Bromine does not occur by itself in nature, it is found as colorless soluble crystalline mineral halide salts. Bromine was discovered and first isolated by Antoine Jérôme Balard and Leopold Gmelin in 1825-1826.

Bromine is the only liquid halogen. Bromide compounds are formed when a metallic cation binds with a charged (- 1) bromine (Br) anion to form a bromide salt of that metal. Metallic Bromides are marketed under the trade name AE Bromides™. Most metal bromide compounds are water soluble for uses in water treatment, chemical analysis and in ultra high purity for certain crystal growth applications. Bromide in an aqueous solution can be detected by adding carbon disulfide (CS2) and chlorine. Bromides were first prepared and used as sedatives, which is why a "tired" expression or saying is sometimes called a bromide.

Bromine is corrosive and toxic. Bromine information, including technical data, safety data and its high purity properties, research, applications and other useful facts are specified below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included. For additional information please see the Bromides Information Center.

  • Properties
  • Safety Data
  • Products
  • Research
  • Isotopes
  • Other Elements

Bromine Properties

Symbol: Br Melting Point: -7.2 oC, 19.04 oF, 265.95 K
Atomic Number: 35 Boiling Point: 58.8 oC, 137.84 oF, 331.95 K
Atomic Weight: 79.90 Density: (Br2, liquid) 3.1028 g·cm−3
Element Category: halogen Liquid Density @ Melting Point: N/A
Group, Period, Block: 17 (halogens), 4, p Specific Heat: N/A
    Heat of Vaporization 29.96 kJ·mol−1
CHEMICAL STRUCTURE Heat of Fusion 10.571 kJ·mol−1
Electrons: 35 Thermal Conductivity: 0.122 W·m−1·K−1
Protons: 35 Thermal Expansion: N/A
Neutrons: 45 Electrical Resistivity: (20 °C) 7.8×1010Ω·m
Electron Configuration: [Ar]4s23d104p5 Electronegativity: 2.96 (Pauling scale)
Atomic Radius: 120 pm Tensile Strength: N/A
Covalent Radius: 120±3 pm Molar Heat Capacity: 75.69 J·mol−1·K−1
Van der Waals radius: 183 pm Young's Modulus: N/A
Oxidation States: 7, 5, 4, 3, 1, -1 (strongly acidic oxide) Shear Modulus: N/A
Phase: liquid Bulk Modulus: N/A
Crystal Structure: orthorhombic Poisson Ratio: N/A
Magnetic Ordering: diamagnetic Mohs Hardness: N/A
1st Ionization Energy: 1139.9 kJ·mol−1 Vickers Hardness: N/A
2nd Ionization Energy: 2103 kJ·mol−1 Brinell Hardness: N/A
3rd Ionization Energy: 3470 kJ·mol−1 Speed of Sound: (20°C) 206 m·s−1
CAS Number: 7726-95-6 Abundance in typical human body, by weight: N/A
ChemSpider ID: 4514586 Abundance in typical human body, by atom: N/A
PubChem CID: 24408 Abundance in universe, by weight: N/A
MDL Number: MFCD00010896 Abundance in universe, by atom: N/A
EC Number: 231-778-1 Discovered By: Antoine Jérôme Balard and Leopold Gmelin
Beilstein Number: N/A Discovery Date: 1825
SMILES Identifier: [Br]  
InChI Identifier: InChI=1S/Br Other Names: Brom, Brome, Bromo

Bromine Products

Recent Research & Development for Bromine

  • A. Riyaz, A. Tauheed, K. Rahimullah, Extended analysis of fifth spectrum of bromine: Br V, Journal of Quantitative Spectroscopy and Radiative Transfer, Volume 147, November 2014
  • Diogo L. Rocha, Marcos C. Machado, Wanessa R. Melchert, A sensitive flow-based procedure for spectrophotometric speciation analysis of inorganic bromine in waters, Talanta, Volume 129, 1 November 2014
  • Deqiang Liang, Wenzhong Huang, Lin Yuan, Yinhai Ma, Jingmei Ma, Deman Ning, An underrated cheap Lewis acid: Molecular bromine as a robust catalyst for bis(indolyl)methanes synthesis, Catalysis Communications, Volume 55, 5 October 2014
  • Yan Liu, Lining Xu, Minxu Lu, Yao Meng, Jinyang Zhu, Lei Zhang, Corrosion mechanism of 13Cr stainless steel in completion fluid of high temperature and high concentration bromine salt, Applied Surface Science, Volume 314, 30 September 2014
  • Jefferson S. de Gois, Éderson R. Pereira, Bernhard Welz, Daniel L.G. Borges, Simultaneous determination of bromine and chlorine in coal using electrothermal vaporization inductively coupled plasma mass spectrometry and direct solid sample analysis, Analytica Chimica Acta, Available online 17 September 2014
  • Sema Gunduz, Suleyman Akman, Determination of bromine by high resolution molecular absorption of strontium mono bromide generated in a graphite furnace, Microchemical Journal, Volume 116, September 2014
  • Rochele S. Picoloto, Sandra M. Cruz, Paola A. Mello, Edson I. Muller, Patricia Smichowski, Erico M.M. Flores, Combining pyrohydrolysis and ICP-MS for bromine and iodine determination in airborne particulate matter, Microchemical Journal, Volume 116, September 2014
  • Mario C. Foti, Concetta Rocco, Solvent-dependent release of bromine from bromoquercetins, Tetrahedron Letters, Volume 55, Issue 31, 30 July 2014
  • Masaki Ohata, Tsutomu Miura, Accurate determination and certification of bromine in plastic by isotope dilution inductively coupled plasma mass spectrometry, Analytica Chimica Acta, Volume 837, 21 July 2014
  • Evan C. Ged, Treavor H. Boyer, Effect of seawater intrusion on formation of bromine-containing trihalomethanes and haloacetic acids during chlorination, Desalination, Volume 345, 15 July 2014

Bromine Isotopes

Bromine (Br) has two stable isotopes: 79Br and 81Br.

Nuclide Symbol Isotopic Mass Half-Life Nuclear Spin
79Br 78.9183371 Stable 3/2-
81Br 80.9162906 Stable 3/2-