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The half life of ""^(24)Na is 15.0 hours...

The half life of `""^(24)Na` is 15.0 hours. What percentage of it remains after 60 hours ?

A

0

B

0.0331

C

0.0625

D

`12.5 %`

Text Solution

Verified by Experts

The correct Answer is:
C
Total number of half the periods `=(60)/(15)=4`
Amount remained , `N=100xx((1)/(4))^(2)`
`=(100)/(16)=6.25 %`
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DINESH PUBLICATION-NUCLEAR AND RADIO CHEMISTRY-Unit Test 4
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