Suppose there are 2 x 107 Radon atoms trapped in a basement. Radon has a half life of t1/2 = 3.83 days.
Estimate the number of radon atoms will be left after 23 days.
N = atoms
Initially, the Radon is decaying at a rate of 63 disintegrations/second. Estimate the decay rate after 23 days
R = disintegrations/second