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← ScienceWhich mechanism dictates varying abundance of stable isotopes?
A)Mass-dependent fractionation during geochemical processes✓
B)Neutron capture cross-sections during nucleosynthesis
C)Resonance stabilization within crystalline structures
D)Orbital electron shielding across atomic species
💡 Explanation
Mass-dependent fractionation determines stable isotope ratios; lighter isotopes react faster because kinetic energy variations cause differing reaction rates; therefore, elemental distribution varies, rather than relying on other nuclear behavior.
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