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JEE Advanced · Physics · 28. Nuclear Physics

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?

  1. A Nα=5
  2. B Nα=6
  3. C Nβ=2
  4. D Nβ=4
Verified Solution

Answer & Solution

Correct Answer

(C) Nβ=2

Step-by-step Solution

Detailed explanation

 90232Th is converting into  82212Pb
Change in mass number A=232-212=20 Mass number of an α particle =4
No of α particle=204=5
Due to 5α particle, Z will change by 10 unit.
Since given change is 8, therefore no. of β- particle is 2.
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