Atomic Number Of Br

  

Bromine is a chemical element with atomic number 35 which means there are 35 protons and 35 electrons in the atomic structure. The chemical symbol for Bromine is Br. Atomic Mass of Bromine. Bromine is a toxic oily liquid of intense red color, known for its strong unpleasant.

Bromine: isolation

Isolation: bromine is available commercially so it is not normally necessary to make it in the laboratory. Bromine also occurs in seawater as the sodium salt but in much smaller quantities than chloride. It is recovered commercially through the treatment of seawater with chlorine gas and flushing through with air. In this treatment, bromide is oxidized to bromine by the chlorine gas. The principle of oxidation of bromide to bromine is shown by the addition of a little chlorine water to aqueous solutions of bromide. Wondershare edrawmax for mac. These become brown as elemental bromine forms.

2Br- + Cl2 → 2Cl- + Br2

Small amounts of bromine can also be made through the reaction of solid sodium bromide, NaBr, with concentrated sulphuric acid, H2SO4. The first stage is formation of HBr, which is a gas, but under the reaction conditions some of the HBr is oxidized by further H2SO4 to form bromine and sulphur dioxide. This reaction does not work with the corresponding chlorides and fluorides.

NaBr (s) + H2SO4 (l) → HBr (g) + NaHSO4 (s)

2HBr (g) + H2SO4 (l) → Br2 (g) + SO2 (g) + 2H2O (l)

Bromine

Atomic Number:35Atomic Radius:183 pm (Van der Waals)
Atomic Symbol:BrMelting Point:-7.2 °C
Atomic Weight:79.90Boiling Point:58.8 °C
Electron Configuration:[Ar]4s23d104p5Oxidation States:, 5, 4, 3, 1, −1 ​(a strongly acidic oxide)
Atomic

History

From the Greek word bromos, stench. Discovered by Balard in 1826, but not prepared in quantity until 1860.

Sources

A member of the halogen group, bromine is obtained from natural brines from wells in Michigan and Arkansas. Some bromine is extracted today from seawater, which contains only about 85 ppm.

Properties

Bromine is the only nonmetallic liquid element. It is a heavy, mobile, reddish-brown liquid, volatilizing readily at room temperature to a red vapor with a strong disagreeable odor, resembling chlorine, and having a very irritating effect on the eyes and throat; it is readily soluble in water or carbon disulfide, forming a red solution, is less active than chlorine but more so than iodine; it unites readily with many elements and has a bleaching action; when spilled on the skin it produces painful sores. It presents a serious health hazard, and maximum safety precautions should be taken when handling it.

Atomic Number Of Bromine

Production

Much of the bromine output in the U.S. was used in the production of ethylene dibromide, a lead scavenger used in making gasoline anti-knock compounds. Lead in gasoline, however, has been drastically reduced due to environmental considerations. This will greatly affect future production of bromine.

Atomic Number Of Bronze

Atomic

Bromine Number Of Electrons

Uses

Atomic Number Of Bromine 81

Bromine is used in making fumigants, flameproofing agents, water purification compounds, dyes, medicines, sanitizers, inorganic bromides for photography, etc. Organic bromides are also important.