Nuclear Physics And Radioactivity Question 275
Question: The decay constant of radium is $ 4.28\times {{10}^{-4}} $ per year. Its half life will be [MNR 1990]
Options:
A) 2000 years
B) 1240 years
C) 63 years
D) 1620 years
Show Answer
Answer:
Correct Answer: D
Solution:
$ T=\frac{0.6931\times 1}{\lambda }=\frac{0.6931\times 1}{4.28\times {{10}^{-4}}}year=1620\ years $
BETA
