They are 90.92% of , 0.26% of and 8.82% of . Solution: Example: The neon element has three isotopes. The known isotopes of Bromine are Br-68 to Br-94. Br-81 is used for the production of the radioisotope Kr-81m which is used for diagnostics. The isotope Br-81 has a relative abundance of 49.31%. Both exist in equal amounts. Pages in category "Isotopes of bromine" The following 32 pages are in this category, out of 32 total. Both Bromine Isotopes are used in nuclear medicine. One isotope of bromine has an atomic mass of 78.92amu and a relative abundance of 50.69%. Chemistry Matter Atomic Mass. It is a weighed average of the different isotopes of an element. Bromine has two isotopes, Br-79 and Br-81. This list may not reflect recent changes (). Calculate the relative atomic mass of bromine. 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 … 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. Solution: Atomic Mass: Introduction What is atomic mass? Bromine-79 has a mass of 78.918 amu and is 50.69% abundant. 1 Answer 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. Naturally occurring bromine consists of a mixture of isotopes that’s approximately 50 percent 79 Br and 50 percent 81 Br. 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 The other major isotope of bromine has an atomic mass of 80.92amu and a relative abundance of 49.31%. Worksheet: Isotope Problems 1. Using the atomic mass reported on the periodic table, determine the mass of bromine-81, the other isotope of bromine. 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. 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