After an interval of one day , `1//16th` initial amount of a radioactive material remains in a sample. Then, its half-life is .

After an interval on one day 1//6th of the initial amount of a radioactive material remains in a sample. Then its half life is

If a radioactive material remains 25% after 16 days, then its half life will be

If a radioactive material remains 25% after 16 days, then its half life will be

After two hours 1//6 th of the initial amount of a certain radioactive isotope remains undecayed. The half life of the isotope is :

A radioactive material of mass number 198 decays with half life of 3 days. If initial amount of radioactive material is 2mg then its initial activity will be?

The fraction of the radioactive sample will remain undecayed after 4 half-life periods is

A sample contains 16 gm of radioactive material, the half-life of which is two days. After 32 days, the amount of radioactive material left in the sample is

A sample contains 16 gm of radioactive material, the half-life of which is two days. After 32 days, the amount of radioactive material left in the sample is