Atoms And Nuclei Question 376

Question: Let Nβ be the number of p particles emitted by 1 gram of Na24 radioactive nuclei (half-life =15 hrs) in 7.5 hours, Nβ is close to (Avogadro number =6.023×1023/gmole ):

Options:

A) 6.2×1021

B) 7.5×1021

C) 1.25×1022

D) 1.75×1022

Show Answer

Answer:

Correct Answer: B

Solution:

  • We know that Nβ=N0(1eλt) Nβ=6.023×102324[1e,n,215×7.5]

    on solving we get, Nβ=7.4×1021
    If α and B are emitted simultaneously.



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