At some instant the ratio of the amount of two radioactive elements is 2 : 1 . If their half-lives respectively are 12 hours and 16 hours, then after two days, the ratio of the amount of two substances is

Question

At some instant the ratio of the amount of two radioactive elements is 2 : 1 . If their half-lives respectively are 12 hours and 16 hours, then after two days, the ratio of the amount of two substances is, 1 : 1, 1 : 2, 3 : 1, 4 : 1

MARKS App · Accepted Answer

N 1 = 1 2 4 N 0 = N 0 16 and for the second element N 2 = 1 2 3 N 0 ' = N 0 ' 8 N 1 N 2 = N 0 N 0 ' 8 16 = N 0 2 N 0 ' Now given that N 0 : N 0 ' = 2 : 1 N 1 N 2 = 2 2 = 1 : 1

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