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What is radioactivity ?...

What is radioactivity ?

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The phenomenon of spontaneous disintegration of radioactive elements by emitting certain radiations ois known as radioactivity.
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Knowledge Check

  • Which of the following has highest value of radioactivity ?

    A
    1g of Ra
    B
    1 g of `RaSO_(4)`
    C
    1g of `RaBr_(2)`
    D
    1g of `Ra(HPO_(4))`

  • The half life period of a radioactive substance is 15 minutes. What per cent of radioactivity of that material will remain after 45 minutes ?

    A
    1
    B
    12.5
    C
    1.5
    D
    7.5

  • The device used for the measurement of radioactivity is :

    A
    Nuclear reactor
    B
    Cyclotron
    C
    Mass spectrometer
    D
    G.M. counter.

    • Similar Questions

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    What is artificial radioactivity ?

    In an experiment, the carbon dioxide available to a C_(3) plant was labelled with a radioactive isotope and the amount of radioactivity in the chloroplast was measured.As photosynthesis proceeded, in which of the following molecules did the radioactivity first appear ?

    Radioactivity is due to

    a) What are radioactive wastes? Mention how radioactive wastes are disposed. b) Write short notes on e-wastes.

    Which of the following is an example of induced radioactivity ?

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