Asked by Min
Lithium has 2 isotopes. The relative atomic masses are 6.02 and 7.02. The average relative atomic mass of lithium is 6.94. What is the calculated relative abundance of the lighter isotope?
Answers
Answered by
Steve
Say you have 1 gram of Lithium. If x grams have mass 6.02, then
6.02x + 7.02(1-x) = 6.94
x = .08
so, 8% of Li is the lighter isotope. Makes sense, since 6.94 is so much closer to the heavier value.
6.02x + 7.02(1-x) = 6.94
x = .08
so, 8% of Li is the lighter isotope. Makes sense, since 6.94 is so much closer to the heavier value.
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