99% of a radioactive element will decay between

6 and 7 half lives

7 and 8 half lives

8 and 9 half lives

9 half lives

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[a] N=N0(12)n⇒NN0=(12)n⇒1100=(12)n⇒2n=100 n comes out in between 6 and 7.

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Question Text	99% of a radioactive element will decay between
Answer Type	Text solution:1
Upvotes	152