1. Tardigrade
  2. Question
  3. Physics
  4. A nuclei X with mass number A and charge number Z, disintegrates into one α-particle and one β-particle. The resulting nuclide R has atomic mass and atomic number, equal to :

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Q. A nuclei $X$ with mass number $A$ and charge number $Z$, disintegrates into one $\alpha$-particle and one $\beta$-particle. The resulting nuclide $R$ has atomic mass and atomic number, equal to :

Rajasthan PMTRajasthan PMT 2005Atoms

Solution:

When an $\alpha$-particle is emitted, mass number of nuclide $X$ is reduced to $4$, and its charge number is reduced to $2$, But when a $\beta$-particle is emitted, mass number of remains the same and its charge number is increased by $1$. Hence, the resulting nuclide has atomic mass $A-4$ and atomic number $Z-1$.