Nuclei - Result Question 78
79. The half life of radium is about 1600 years. Of of radium existing now, will remain unchanged after
(a) 3200 years
(b) 4800 years
(c) 6400 years
(d) 2400 years
[2004]
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Answer:
Correct Answer: 79. (a)
Solution:
- (a)
will become in two half lives, , it is 3200 years.