Question

The decay constant of radioactive substance is $4.33\times {10}^{-4}$ per year. Calculate its half life period.

Answer 1

Here, $\lambda =4.33\times {10}^{-4}$ per year

$t_{1/2}=\frac{0.6931}{\lambda }$

$t_{1/2}=\frac{0.6931}{4.33\times {10}^{-4}}=0.16\times {10}^{4}s$