Nuclei Ques 79
79. The half life of radium is about 1600 years. Of $100 g$ of radium existing now, $25 g$ will remain unchanged after
[2004]
(a) 3200 years
(b) 4800 years
(c) 6400 years
(d) 2400 years
Show Answer
Answer:
Correct Answer: 79.(a)
Solution:
- (a) $100 g$ will become $25 g$ in two half lives, so, it is 3200 years.
BETA
