CUET · PHYSICS · PYQ PAPER 2025
A radioactive nucleus of mass number A and atomic number Z, emits an alpha particle first and then a beta negative particle. The mass number and atomic number of the daughter nucleus will be
- A A-4, Z-1
- B A-1, Z-2
- C A-2, Z + 1
- D A-2, z + 2
Answer & Solution
Correct Answer
(A) A-4, Z-1
Step-by-step Solution
Detailed explanation
\(_Z^A X \xrightarrow{\alpha} {}_{Z-2}^{A-4} Y\) \({}_{Z-2}^{A-4} Y \xrightarrow{\beta^-} {}_{Z-1}^{A-4} D\) Mass number: \(A-4\), Atomic number: \(Z-1\)
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