The half life period of a radioactive substance is 10 year. The amount of the substance decayed after 40 years would be

The half-life period of a radioactive substance is 5 min . The amount of substance decayed in 20 min will be

The half-life period of a radioactive substance is 5 min . The amount of substance decayed in 20 min will be

The half life of a radioactive substance is 13 years. The decay constant is

The half-life periof of a radioactive substance is x years. The fraction remaining after 2x years is………….. .

The half-life periof of a radioactive substance is x years. The fraction remaining after 2x years is………….. .

The half-life of a radioactive substance is 1 y. After 2 y, what will the amount of the substance that will be disintegrated?