Isotopes and relative atomic mass QUIZ (paper 2)
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A sample of iron has the following isotopic composition by mass.
Calculate the relative atomic mass of iron based on these data.
Answer (to three sig figs):
Naturally occurring silver has two stable isotopes, 107Ag and 109Ag. The relative atomic mass of silver is 107.87. Estimate the percentage abundance of 107Ag.
Answer (to three sig figs): %
Magnesium has three stable isotopes, Mg-24, Mg-25 and Mg-26. The abundance of Mg-24 is 78.6%. Calculate the abundance of Mg-25 .
Mg-25 abundance (to three sig figs): %