This list may not reflect recent changes (). Bromine-79 has a mass of 78.918 amu and is 50.69% abundant. The isotope of Bromine Br-79 has a relative abundance of 50.67%. There are two different isotopes of bromine atoms. Isotopes of Bromine (click to see decay chain): 67 Br 68 Br 69 Br 70 Br 71 Br 72 Br 73 Br 74 Br 75 Br 76 Br 77 Br 78 Br 79 Br 80 Br 81 Br 82 Br 83 Br 84 Br 85 Br 86 Br 87 Br 88 Br 89 Br 90 Br 91 Br 92 Br 93 Br 94 Br 95 Br 96 Br 97 Br It is a weighed average of the different isotopes of an element. One isotope of bromine has an atomic mass of 78.92amu and a relative abundance of 50.69%. Br-81 is used for the production of the radioisotope Kr-81m which is used for diagnostics. Chemistry Matter Atomic Mass. Br-79 can be used for the cyclotron production of Kr-77 which decays to the radioisotope Br-77 although the most common production route for Br-77 is via Se-77. Bromine is extracted by electrolysis from natural bromine-rich brine deposits in the USA, Israel and China. Therefore, bromine is easily spotted in the mass spectrum by observing a peak of approximately equal intensity two mass units higher than the molecular ion … Worksheet: Isotope Problems 1. Both Bromine Isotopes are used in nuclear medicine. A student looked up the naturally occurring isotopes of bromine and found the following information: 50.54% of the naturally occurring isotopes of bromine have an atomic mass of 78.92 u while 49.46% of the naturally occurring an atomic mass of 80.92 u isotopes of bromine have Calculate the average atomic mass of bromine, showing all work: 2. Calculate the relative atomic mass of bromine. Solution: Example: The neon element has three isotopes. It was the first element to be extracted from seawater, but this is now only economically viable at the Dead Sea, Israel, which is particularly rich in bromide (up to 0.5%). chemistry Pages in category "Isotopes of bromine" The following 32 pages are in this category, out of 32 total. The known isotopes of Bromine are Br-68 to Br-94. Bromine has two isotopes, Br-79 and Br-81. 1 Answer The other major isotope of bromine has an atomic mass of 80.92amu and a relative abundance of 49.31%. Using the atomic mass reported on the periodic table, determine the mass of bromine-81, the other isotope of bromine. They are 90.92% of , 0.26% of and 8.82% of . Solution: Atomic Mass: Introduction What is atomic mass? Both exist in equal amounts. Isotopes of bromine Bromine (Br) Standard atomic mass: 79.904(1) u Additional recommended knowledge Weighing the Right Way Safe Weighing Range Ensures Accurate The isotope Br-81 has a relative abundance of 49.31%. Bromine has two naturally occurring isotopes. Under normal conditions, elemental bromine consists of Br_{2} \text molecules, and the mass of a Br $_{2}$ molecule is the sum of the masses of the two atoms in the molecule. 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