The `t_(1//2)` of a radionuclide is 8 hours. Starting with 40 g of the isotope, the amount in gm remainig after one day will be:

A radioactive isotope has half life of 27 days. Starting with 4g of the isotope, what will be the mass remaining after 75 days ?

The half life period of a radioactive element is 120 days. Starting with 1 g, the amount of element decayed in 600 days will be :

The half-life of a radioisotope is four hours. If the initial mass of the isotope was 200 g , the undecayed mass remaining after 24 hours is :

The half-life of a radioisotope is four hours. If the initial mass of the isotope was 200g. The mass remaining after 24hours undecayed is: