Answer :

n= 1mole = 6× 1023 atoms=N˳

Given, λ =


According to Law of Radioactivity,


No. of radioactive sample at time t,


N= 5.2× 1023 atoms


According to law of Radioactivity, activity of a radioactive isotope at time t is the no. of active nuclei at that time times disintegration constant of the decay process.


As



Activity transmitted



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