Asked by Caleb

An element consists of 1.40% of an isotope with mass 203.973 amu, 24.10% of an isotope with mass 205.9745 amu, 22.10% of an isotope with mass 207.9766 amu. Calculate the average atomic mass and identify the element
Answered by Damon
Those do not add up to 100% , typo?
Answered by Damon
By the way lead, Pb, is about 207.2
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