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 & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter2: Atoms Molecules And Ions
Section2.2: Isotopes And Atomic Weight
Problem 2.3CYU: Neon has three stable isotopes, one with a small abundance. What are the abundances of the other two...
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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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