Nuclear Physics And Radioactivity Question 320
Question: Half-life of a radioactive element is 10 days. The time during which quantity remains 1/10 of initial mass will be [RPET 1997]
Options:
A) 100 days
B) 50 days
C) 33 days
D) 16 days
Show Answer
Answer:
Correct Answer: C
Solution:
After three half-lives (i.e., 30 days) it remains $ {{( \frac{1}{2} )}^{3}}=\frac{1}{8}, $ so it will remain $ \frac{1}{10}th $ , approximately in 33 days.
BETA
