a substance has a life of 30 minutes. what fraction of the atoms will not have decayed after 1 hour?
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One quarter of the atoms will not have decayed after 1 hour. The half-life of the substance is 30 minutes. That means that 1 hour is 2 half-lives for the substance
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one quarter of the atomaswill not have decayed after 1 hr the half life of the substance in 30 minutes that means that 1 hr in 2 half dives for the substance
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