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Bromine-77 is the most stable radioisotope of bromine, with a half-life of 57 hours. [13] Although β + decay is possible for this isotope, about 99.3% of decays are by electron capture. [ 9 ] Despite its complex emission spectrum, featuring strong gamma-ray emissions at 239, 297, 521, and 579 keV, [ 14 ] 77 Br was used in SPECT imaging in the ...
Bromine. orthorhombic (oS8) Bromine is a chemical element; it has symbol Br and atomic number 35. It is a volatile red-brown liquid at room temperature that evaporates readily to form a similarly coloured vapour. Its properties are intermediate between those of chlorine and iodine.
edit. Aluminium or aluminum (13 Al) has 23 known isotopes from 21 Al to 43 Al and 4 known isomers. Only 27 Al (stable isotope) and 26 Al (radioactive isotope, t 1/2 = 7.2×105y) occur naturally, however 27 Al comprises nearly all natural aluminium. Other than 26 Al, all radioisotopes have half-lives under 7 minutes, most under a second.
Bromoform was discovered in 1832 by Löwig who distilled a mixture of bromal and potassium hydroxide, as analogous to preparation of chloroform from chloral. [5]Bromoform can be prepared by the haloform reaction using acetone and sodium hypobromite, by the electrolysis of potassium bromide in ethanol, or by treating chloroform with aluminium bromide.
Bromine compounds are compounds containing the element bromine (Br). These compounds usually form the -1, +1, +3 and +5 oxidation states. Bromine is intermediate in reactivity between chlorine and iodine, and is one of the most reactive elements. Bond energies to bromine tend to be lower than those to chlorine but higher than those to iodine ...
Aluminium bromide is any chemical compound with the empirical formula AlBr x. Aluminium tribromide is the most common form of aluminium bromide. [3] It is a colorless, sublimable hygroscopic solid; hence old samples tend to be hydrated, mostly as aluminium tribromide hexahydrate (AlBr 3 ·6H 2 O).
Metal ammine complex. Ball-and-stick model of the tetraamminediaquacopper (II) cation, [Cu (NH3)4(H2O)2]2+. In coordination chemistry, metal ammine complexes are metal complexes containing at least one ammonia (NH3) ligand. "Ammine" is spelled this way for historical reasons; [1] in contrast, alkyl or aryl bearing ligands are spelt with a ...
Infobox references. In chemistry, the perbromate ion is the anion having the chemical formula BrO−. 4. It is an oxyanion of bromine, the conjugate base of perbromic acid, in which bromine has the oxidation state +7. [1] Unlike its chlorine (ClO − 4) and iodine (IO − 4) analogs, it is difficult to synthesize. [2]