The four quantum numbers for the electron in the outer most orbital of potassium (atomic no. 19) are

\(\mathrm{n}=4,\mathrm{l}=0,\mathrm{m}=0,\mathrm{s}=+1/2\)

\(\mathrm{n}=2,\mathrm{l}=0,\mathrm{m}=0,\mathrm{s}=+1/2\)

\(\mathrm{n}=3,\mathrm{l}=2,\mathrm{m}=−1,\mathrm{s}=+1/2\)

\(\mathrm{n}=3,\mathrm{l}=0,\mathrm{m}=1,\mathrm{s}=+1/2\)