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Sketch a graph to illustrate radioactiv...

Sketch a graph to illustrate radioactive decay. Define the half life of a radioactive element and find its value in terms of decay constant `lambda`

Text Solution

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According to radioactive decay law
`N=N_(0)e^(-lambdaT)`
A graph between N and t is as shown in the figure.
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Knowledge Check

  • The rate of decay of radioactive element

    A
    is constant
    B
    decreases inversely with time
    C
    increases directly with time
    D
    decreases exponentially with time

  • The decay constant lambda of a radioactive sample:

    A
    Decreases with increase of external pressure and temperature
    B
    Increase with increase of external pressure and temperature
    C
    Decreases with increase of temperature and increase of pressure
    D
    Is independent of temperature and pressure.

  • If half life of radioactive atom is 2.3 days, then its decay constant would be :

    A
    `0.1 "days"^(-1)`
    B
    `0.2 "days"^(-1)`
    C
    `0.3 "days"^(-1)`
    D
    `2.3 "days"^(-1)`

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