When a nucleus undergoes decay

PHYSICS · Single correct · CBSE · Physics · Nuclei · Nuclei

Problem

When a nucleus undergoes

\beta^{-}

decay, how do its atomic number

Z

and mass number

A

change? (a)

Z

remains unchanged,

A\,\text{ decreases by } 1

(b)

Z\,\text{ increases by } 1,\, A\,\text{ remains unchanged}

(c)

Z\,\text{ decreases by } 1,\, A\,\text{ remains unchanged}

(d)

Z\,\text{ decreases by } 2,\, A\,\text{ decreases by } 4