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""^(18)F undergoes 90% decay in 365 min....

`""^(18)F` undergoes 90% decay in 365 min. The decay constant for `""^(18)F` is :

A

`6.31xx10^(-3)min""^(-1)`

B

`7.32xx10^(-3)min""^(-1)`

C

`6.31xx10^(-4)min""^(-1)`

D

`6.31xx10^(-2)min`

Text Solution

Verified by Experts

The correct Answer is:
A
`lamda=(2.303)/(365)log""(100)/(10)`
`=(2.303)/(366)xx1=6.31xx10^(-3)min""^(-1)`
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