Physics

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

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

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

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