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#half life #radioactive decay #nuclear physics #isotope decay time #radiometric dating #decay constant

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#rubidium #rubidium-87 #radioactive isotope #rb-87 #rubidium-strontium dating #radiometric dating

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#zircon mineral #radiometric dating #U-Pb dating #geochronology #durable mineral #igneous rock

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#radiometric dating #geochronology #dating methods #earth age determination #isotopes #scientific dating