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The half-life period of a radioactive element A is same as the mean life time of another radioactive element B. Initially both have the same number of atoms. Then (a) A and B have the same decay rate initially (b) A and B decay at the same rate always (c) B will decay at faster rate than A (d) A will decay at faster rate than B. |
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Answer» (c) B will decay at faster rate than A (t 1/2)A = (t mean)B \(\frac{0.6931}{λ_A} = \frac{1}{λ_B}\) λA = 0.6931 λB λA < λB |
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