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What does the half-life of a radioactive isotope represent? A. The time needed for ½ of an unstable isotope to decay B. The time needed for ¼ of an unstable isotope to decay C. The time that uranium changes into thorium D. The time needed to construct a nuclear reactor

User Davegravy
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Answer: touch grass

Explanation: i said so lol

User Teki
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