The time in which activity of an element...

The time in which activity of an element is reduced to 90% of its original value is (given `t""_(1//2)=1.4xx10""^(10)yr`)

A

`1.128xx10""^(9)year`

B

`2.128xx10""^(9)year`

C

`3.128xx10""^(9)year`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:

b

`lamda=2.303/tlog.N""_(0)/N(lamda=0.693//t""_(1//2))`

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