Average atomic masses listed by IUPAC are based on a study of experimental results. Bromine has two. isotopes 79Br and 81Br, whose masses (78.9183 and 80.9163 amu) and abundances (50.69% and 49.31%) were determined in earlier experiments.
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Phenylketonuria is a genetic disease that is inherited which increases level a substance in the blood known as phenylalanine and its accumulation in the brain leads to mental retardation.
In 1960 Dr. Robert Githrie leads the initiative and invented a detection test for it that helped many children to save by reducing the amount of phenylalanine in diet but the test also produced some false positives that get a mental problem on treating and lead to the screening of rare genetic disease in newborn.
So the correct option is "The false positives produced by Dr. Guthrie's test".
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- yes ur absolutely correct
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