One microgram of phosphorus-32 was injec...

One microgram of phosphorus-32 was injected into a live syetm for biological studies. The half life `""_(15)P""^(32)` is 14.3 days, calculate the time it will take the radioactivity to fall to 10% of the initial value

47.52 days

57.52 days

100 days

4.7 days

Text Solution

Verified by Experts

The correct Answer is:

`lamda=2.303/tlog.N""_(0)/N`

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