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
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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