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The half life of a radio -isotope is fou...

The half life of a radio -isotope is four hour. If the initial mass of the isotope was 20g,the mass left after 24 hours undecayed is

A

4.167 g

B

2.084g

C

3.125g

D

1.042g

Text Solution

Verified by Experts

The correct Answer is:
c
`N""_("left")=(N""_(0))/(2""_(n))=200/2""^(6)=3.125g`
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