Solve this: Q A radioactive element X disintegrates to form Y At any instant t, the ratio of - Physics - Nuclei

Question

Solve this:
Q A radioactive element X disintegrates to form Y At any instant t,
the ratio of number of atoms of X and Y are respectively 1 : 15 If
initially there is no and half life period of X is 15 years then t
in years is
(1) 70
(2) 50
(3) 60
(4) 40

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Solve this: Q. A radioactive element X disintegrates to form Y. At any instant t, the ratio of number of atoms of X and Y are respectively 1 : 15. If initially there is no and half life period of X is 15 years. then t in years is (1) 70 (2) 50 (3) 60 (4) 40

Solve this:
Q. A radioactive element X disintegrates to form Y. At any instant t, the ratio of number of atoms of X and Y are respectively 1 : 15. If initially there is no and half life period of X is 15 years. then t in years is
(1) 70
(2) 50
(3) 60
(4) 40