Two radioactive nuclei `A` and `B` are intially in the ratio `1:4`. Also initial activities of the nuclei are in the ratio `1:8`. Given that, half life of `A` is `2` years, choode the correct alternatives

An element has (1^(th))/16 of initial activity in 20 sec.Half life of the nuclei is

In a sample of radioactive material , what fraction of the initial number of active nuclei will remain undisintegrated after half of the half life of the sample ?

In a sample of radioactive material , what fraction of the initial number of active nuclei will remain undisintegrated after half of the half life of the sample ?

Two radioactive substance X and Y initially contain equal number of nuclei. X has a half life of 1 hour and X has a half-life of 2 hours. After the ratio of activity of X to that of y is

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 :

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: