Half-life of a radioactive substance is `12.5 h` and its mass is `256 g`. After what time the amount of remaining substance is `1g`?

Half life of a radioactive elemets is 12.5 hour and its quantity is 256 gm. After how much time is quantity will remain 1 gm ?

Half life of a radioactive elemets is 12.5 hour and its quantity is 256 gm. After how much time is quantity will remain 1 gm ?

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

Half-life of a radioactive substance is 2.9 days and the amount of substance is 10 mg. How many micrograms of the substance will be left after 29 days.

Half-life of a radioactive substance is 2.9 days. Calculate the amount of 10 mg of substance left after 29 days.