Question

The half-life of a radioactive nuclide is $100$ years. Then, what is its disintegration constant (in $yea{r}^{-1}$) ?

• A. 6.93 x 10${}^3$
• B. 6.93 x 10${}^2$
• C. 6.93 x 10${}^{-3}$
• D. 6.93

Answer 1

Answer: (C)

6.93 x 10${}^{-3}$

$t_{1/2}=100yrs$

$\lambda =\frac{0.693}{100}$$=0.00693{yrs}^{-1}$