Modern Physics 3 Question 25

26. In a radioactive decay chain, 90232Th nucleus decays to 82212Pb nucleus. Let Nα and Nβ be the number of α and β - particles respectively, emitted in this decay process. Which of the following statements is (are) true?

(2018 Adv.)

(a) Nα=5

(b) Nα=6

(c) Nβ=2

(d) Nβ=4

Integer Answer Type Questions

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Solution:

  1. 90232Th is converting into 82212Pb.

Change in mass number (A)=20

Number of α-particle emitted =204=5

Due to 5α-particles, Z will change by 10 units.

Since, given change is 8 , therefore number of β-particles emitted is 2 .



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