The half-life of At 215 is 100 μs . The time taken for the radioactivity of a sample of At 215 to decay to 1 1 6 th of its initial value is

Question

The half-life of At 215 is 100 μs . The time taken for the radioactivity of a sample of At 215 to decay to 1 1 6 th of its initial value is, 400 μs, 6.3 μs, 40 μs, 300 μs

MARKS App · Accepted Answer

If R is activity of radioactive substance after n half lives then R = R 0 1 2 n ; R 0 16 = R 0 1 2 n ∴ n = 4 ; t = nT 1 / 2 = 4 × 100 = 400 μ s

Search any question & find its solution

Looking for more such questions to practice?