Physics

Problem

3. A potassium

{ }^{40} \mathrm{~K}_{19}

nucleus emits a

\mathrm{B}^{-}

and becomes: A)

{ }^{36} \mathrm{Cl}_{17}

{ }^{40} \mathrm{Ar}_{18}

{ }^{40} \mathrm{~K}_{19}

{ }^{40} \mathrm{Ca}_{20}