Nuclear Physics And Radioactivity Question 119
Question: A sample contains 16g of a radioactive material, the half-life of which is two days. After 32 days, the amount of radioactive material left in the sample is Less than 1 mg
Options:
A) Less than 1 mg
B) $ \frac{1}{4}g $
C) $ \frac{1}{2}g $
D) $ 1g $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Remaining amount $ =16\times {{( \frac{1}{2} )}^{32/2}}=16\times {{( \frac{1}{2} )}^{16}}={{( \frac{1}{2} )}^{12}}<1mg $
BETA
