A radioactive decay can form an isotope of the original nucleus with the emission of particles

Options

A. one `alpha ` and two `beta`
B. four `alpha ` and one `beta `
C. one `alpha ` and four `beta`
D. one `alpha ` and one `beta `

Answer

A

Explanation

As the emission of an alpha particle decreases the atomic number and mass number by 2 and 4 respectively while the emission of a beta particle increases the atomic number by 1 but mass nmber remains the same . So, the emission of one alpha particle and two beta particles from the nucleus can from an isotope of the original nucleus .
It may be represented as
` " "_(Z)X^(A) overset (alpha) to ""_(Z-2)Y^(A-4) overset (2beta^(-)) to _(Z)X^(A-4)`