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    Kartik Ajay Mohanty
    Kartik Ajay Mohanty
    Asked: 3 years agoIn:

    Radioactive disintergation always follow `I` order kinetics and is independent of all external factors and is represented by the relation `N = N_(0) e^(-lambda t)` where `lambda` is decay constant and `N` atoms are left at time `t`. The radioactive nature of element is expressed in terms of average life numerically equal to decay constant `(1//lambda)` however all the radioactive do not lose their radioactive nature in thier average life. The radioactive emission involves `alpha, beta` particles as well as `gamma-` rays.The penertrating power order is `alpha lt beta lt gamma`. The emissions can perntrate even thick steel walls but are however unable to penttrate `Pb` blocks. The `S` unit fo rate of decay is `dps`.
    The percentage of atoms decayed in average life of a radioactive element is:
    A. `36.78%`
    B. `63.22%`
    C. `3.678%`
    D. `6.322%`

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