The half - life of tritium is 12.5 years...

The half - life of tritium is 12.5 years. What mass of tritium of initial mass 64 mg will remain undecayed after 50 years ?

A

32 mg

B

8 mg

C

16 mg

D

4 mg

Text Solution

Verified by Experts

The correct Answer is:

D

`m=m_(o)/2^(n)`
t = nT
`50=nxx1.25rArrn=4`
`thereforem=m_(o)/2^(4)=64/16=4mg`

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