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 10 year. The amount of the substance decayed after 40 years would be

Define half life of a radioactive substance.

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

The half life of radioactive substance is T. Then the fraction of the substance that has decayed in time t is-

The half life of radioactive substance is T. Then the fraction of the substance that has decayed in time t is-

Half-life of a radioactive substance is 20 minute. The time between 20% and 80% decay will be

what is the half -life of a radioactive substance if 75% of its given amount disintegrate in 60 min ?