Nuclear Chemistry Question 10
Question: The half-life period of a radioactive substance is 140 days. After how much time 15 g will decay from 16 g sample of it
[AFMC 2002]
Options:
A) 140 days
B) 560 days
C) 280 days
D) 420 days
Show Answer
Answer:
Correct Answer: B
Solution:
$ \frac{0.693}{140}=\frac{2.303}{t}\log \frac{16}{16-15}=560days $
BETA
