Question

Define the term decay constant of a radioactive nucleus. two nuclei p and q have equal number of atoms at t = 0. Their half-lives are 3 hrs and 9 hrs respectively. Two n compare their rates of disintegration, after 18 hrs from the start.

Answer 1

The answer is in the attachment....as i was not able apply all the signs here while answering so i have clipped an attachment....

Hope it helps......