Ap Chemistry

one problem the researchers faced was an uncertainty about whether the signals observed in certain mass spectrometry data were, in fact, due to lead isotopes. Explain why this was a problem. In other words, why wasn't information about the mass of the isotopes sufficient for identifying the isotopes? Provide an example to explain your answer. google DSPACE MILAGRO/MCMA-2006 observations to find the report that goes with this question. Please help!

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  1. mercury (Hg) and lead (Pb) both have an isotope with a mass number of 204

    the difference in mass appears in the 7th significant digit

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