Question

Radioactive substance is a half life is 6 months three fourth of the substance will decay in

Answer 1

And after 2 half lives , we will have ¼ of the substance remaining. In other words, ¾ of the substance will take two half lives to decay. As one half life is given as 4 months , so the substance will take 8 months to decay by ¾ th quantiy by weight.