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Question
Chemistry
The half-life period of 53I125 is 60 days. The radioactivity after 180 days will be
Q. The half-life period of
53
I
125
is 60 days. The radioactivity after 180 days will be
1624
237
WBJEE
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A
25%
B
12.5%
C
33.3%
D
3.0%
Solution:
100%
t
X
1
/2
50%
t
X
1
/2
25%
t
X
1
/2
12.5
Total time =3t1/2 = 180 days