Nuclear Physics And Radioactivity Question 396
Question: If half-life of radium is 77 days. Its decay constant in day will be [BCECE 2005]
Options:
A) $ 3\times {{10}^{-13}} $ /day
B) $ 9\times {{10}^{-3}} $ /day
C) $ 1\times {{10}^{-3}} $ /day
D) $ 6\times {{10}^{-3}} $ /day
Show Answer
Answer:
Correct Answer: B
Solution:
$ \lambda =\frac{0.693}{{T_{1/2}}}=\frac{0.693}{77} $ $ =9\times {{10}^{-3}}/day $ .
BETA
