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Proton nuclear magnetic resonance questions


1H and 13C are two of the most common nuclides studied by high-field NMR spectroscopy due to their abundance in human tissues. Other isotopes that have been studied include 14N, 17O, 31P, 79Br, and 127I. Based on this information, which of the following nuclides will NOT be considered suitable for use with NMR spectroscopy?
Choose 1 answer: