Verified Solution • 2025–26 Session moderate

QNEET-2021-Ph-642: NEET 2021 Physics - Class 12 NEET-2021-Ph-642 Solution: A radioactive nucleus \(_Z^A X _{Z-1}^{A-4} B _{Z-3}^{A-4} C…

A radioactive nucleus ZAX→Z−1A−4B→Z−3A−4C→Z−2A−4D_Z^A X \rightarrow _{Z-1}^{A-4} B \rightarrow _{Z-3}^{A-4} C \rightarrow _{Z-2}^{A-4} D where Z is the atomic number of element X. The possible decay particles in the sequence are: αβ+β−\alpha \beta^+ \beta^- β+αβ−\beta^+ \alpha \beta^- β−αβ+\beta^- \alpha \beta^+ αβ−β+\alpha \beta^- \beta^+

Multiple Choice Options

  • A β\beta _ −- _ , α\alpha _ , β\beta _ +
  • B α\alpha _ , β\beta _ −- _ , β\beta _ +
  • C α\alpha _ , β\beta _ + , β\beta _ −- _
  • D β\beta _ + , α\alpha _ , β\beta _ −- _

Step-by-Step Verified Solution

_ + decreases atomic number by 1. _ decreases atomic number by 2. _ _ increases atomic number by 1.

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