The half-life of radioactive Polonium `(Po)` is `138.6` days. For ten lakh Polonium atoms, the number of disintegrations in `24` hours is.

The half-life of a radioactive substance is 60 days. A sample of it contains 1 mole nuclide. Calculate the number of disintegrations in the first second.

The half-life of a radioactive substance is 40 days. A sample of it contains 1 mole nuclie. Calculate the number of disintegrations in the first second.

The half-life of a radioactive substance is 10 days. The time taken for the ((7)/(8)) th of the sample of disintegrates is

The half life of a radioactive substance is 30 days. What is the time taken to disintegrate to 3//4^(th) of its original mass ?

The half life of a radioactive substance is 30 days. What is the time taken to disintegrate to 3//4^(th) of its original mass ?

The half life of polonium is 140 days. In what time will 15 g of polonium be disintegrated out of its initial mass of 16 g ?