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Half lives of two radioactive nuclei A and B are 10 minutes and 20 minutes, respectively. If, initially a sample has equal number of nuclei, then after 60 minutes, the ratio of decayed numbers of nuclei A and B will be :

a)

9 : 8

b)

3 : 8

c)

8 : 1

d)

1 : 8



Question ID - 51598 | SaraNextGen Top Answer

Half lives of two radioactive nuclei A and B are 10 minutes and 20 minutes, respectively. If, initially a sample has equal number of nuclei, then after 60 minutes, the ratio of decayed numbers of nuclei A and B will be :

a)

9 : 8

b)

3 : 8

c)

8 : 1

d)

1 : 8

1 Answer
127 votes
Answer Key / Explanation : (a) -

NA =  =

NB =  =

  Required ratio =

 =  =

127 votes


127