Question

The half life period of radium is $1600$ years. Calculate the disintegration constant of radium. Mention its unit.

Answer 1

Disintegration constant $\lambda =\frac{0.693}{t_{1/2}}$
Since, $t_{1/2}=1600$ years
So, $\lambda =\frac{0.693}{1600}$
or $\lambda =4.33\times {10}^{-4}{year}^{-1}$