An element whose half-life is 3 years has N atoms. How ma...
An element whose half-life is 3 years has N atoms. How many atoms would have decayed after 9 years
1 N atoms8
1 N atoms3
2 N atoms3
5 N atoms6
7 N atoms8
Correct answer is E
N3 = 3years
N4 = 6years
N8 = 9years
N - N8 = 7N8
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