Only 1/8 th of the total initial number of active radioactive nuclei of a sample is left after 6 days . then 10days fraction that decays is ----

A certain radioactive element has half-life of 4 days. The fraction of material that decays in 2 days is

Half life of a radioactive sample is 4 days. After 16 days how much quantity of matter remain undecayed :

The fraction of atoms of radioactive element that decays in 6 days is (7)/(8) . The fraction that decays in 10 days will be

The activity of a radioactive sample is 1.6 curie, and its half-life is 2.5 days . Its activity after 10 days will be

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 ?

7/8th of the active nuclei present in a radioactive sample has decayed in 8 s. The half-life of the sample is

Half life of a radioactive sample is 10days. What fraction of this sample will remain undecayed after 100days?

The rate at which radioactive substances decay is known to be proportional to the number of such nuclei that are present in a given sample. In a certain sample 10% of the original number of radioactive nuclei have undergone disintegration in a period of 100 years. Find what percentage of the original radioactive nuclei will remain after 1000 years.

In a radioactive sample, the fraction of initial number of redioactive nuclie, which remains undecayed after n mean lives is

A fraction f_1 of a radioactive sample decays in one mean life, and a fraction f_2 decays in one half life. Then