Question

the half life of radon is 3.8 days what will be it,s deacy constant

Answer 1

0.00000211 1/s

Answer 2

\[A=A_o\cdot e^{-\lambda\cdot t}\]Hypothetical our initial concentration will be 100, pass one half life (3.8 days), our concentration will be 50 \[50=100\cdot e^{-\lambda\cdot3.8}\]\[0.5=e^{-3.8\lambda}\]\[ln(0.5)=-3.8\lambda\]\[\boxed{\lambda=0.1824~\frac{1}{days}}\]