Absolute Dating & Radioactive Decay Quiz

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7 Terms

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Isotope

Atoms of the same element with the same number of protons but different numbers of neutrons.

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Absolute age

The actual age of a rock, fossil, or event measured in years.

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Radioactive isotope

An unstable isotope that changes into another element over time.

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Radioactive decay

The natural process by which an unstable isotope changes into a more stable one.

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Parent isotope

The original radioactive element.

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Daughter (decay) product

The stable element formed after radioactive decay.

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Half-life

The time it takes for half of the parent isotope in a sample to decay.