COLUMN A COLUMN B A. an atom that has the same number of protons as other atoms of the 1. ABSOLUTE DATING same element do but that has a different number of neutrons B. process in which a radioactive isotope tends to break down into a stable isotope C. a method of determining the absolute age of an object by comparing the relative percentages of a parent isotope and a daughter isotope 2. HALF-LIFE 3. ISOTOPE 4. RADIOACTIVE DECAY D. any method of measuring the age of an object in years 5. RADIOMETRIC DATING E. pertains to time required for half of a sample of a radioactive isotope to decay to form daughter isotope

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