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How many nuclei of 23892U remain in a rock if the activity registers 530 decays per...

How many nuclei of 23892U remain in a rock if the activity registers 530 decays per second? The half-life is 4.468×109yr.

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Answer #1

The concept used in this question is of radioactivity , i just use the relationship between activitity and the number of radioactive nuclie present at half life , after applying this concept i deduced the number of nuclie in a block .

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