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Which mechanism governs isotopic age estimations via rubidium-strontium dating?

A)Beta decay to stable strontium
B)Alpha emission altering both isotopes
C)Electron capture forming daughter isotopes
D)Positron emission of potassium isotope

💡 Explanation

Beta decay of rubidium-87 to strontium-87 changes their ratio within a mineral because it's a constant radioactive decay mechanism with a very long half-life; therefore providing an accurate date, rather than alpha where ratio changes aren't fixed.

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