After two half-lives, how much of the original material has decayed?
2 answers:
After two half-lives theres only going to be 25% of the original isotope, 75% of the decay product.
Answer:
75%
Explanation:
100 divided by 2 is 50, and 50 divided by 2 is 25. That's how much material you have left, so 75% of it has decayed.
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