Question:medium

If a nucleus P converts into a nucleus Q by the decay of one alpha particle and two $\beta^-$ particles, then the nuclei P and Q are

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Remember the changes in A (mass number) and Z (atomic number) for different types of radioactive decay: Alpha decay ($\alpha$): A decreases by 4, Z decreases by 2. Beta-minus decay ($\beta^-$): A is unchanged, Z increases by 1. Beta-plus decay ($\beta^+$): A is unchanged, Z decreases by 1. Gamma decay ($\gamma$): A and Z are unchanged.

Updated On: Mar 30, 2026

Isotopes
Isobars
Isotones
Isomers

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The Correct Option is A

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