Magnesium constitutes about 2% of Earth’s crust and has three naturally occurring isotopes. Suppose you analyze a mineral and determinethat it contains the three isotopes in the following proportions: Mg-24 (abundance = 79%), Mg-25 (abundance = 10%), and Mg-26 (abundance = 11%). If your friend analyzes a different mineral containing magnesium, do you expect her to obtain the same relative abundances for each magnesium isotope? Explain your reasoning.

Chemistry: Matter and Change
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Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
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Chapter4: The Structure Of The Atom
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Magnesium constitutes about 2% of Earth’s crust and has three naturally occurring isotopes. Suppose you analyze a mineral and determine
that it contains the three isotopes in the following proportions: Mg-24 (abundance = 79%), Mg-25 (abundance = 10%), and Mg-26 (abundance = 11%). If your friend analyzes a different mineral containing magnesium, do you expect her to obtain the same relative abundances for each magnesium isotope? Explain your reasoning.

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