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The nuclear activity of a radioactive element becomes (1/8)ᵗʰ of its initial value in 30 years. The half –life of radioactive element is __________ years.

0 3 Views | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • A

    Answered by

    alok kumar singh | Contributor-Level 10

    a month ago

    A = A? (1/2)?
    A/A? = 1/8 = (1/2)³ ⇒ n = 3
    t = n T½
    30 = 3 T½
    T½ = 10 years

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Density of nuclei is order of 1017 kg m-3.

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