Question

Q: Element X is radioactive and decays via Alpha -decay with a half life of four days .if 12.5% of an original sample of Element X remains after N days.what is the value of N?481216N.O.T

Answer 1

Answer:

according to me its 12 days

Explanation:

As after one half live it remained 50 % after second it became 25% half of 50% And now finally after third half live it has become 12.5% of original sample X . Number of days N will be as

half life * no of H L = 4 * 3  = 12 days