Q51. In an atom, total number of electrons having quantum numbers $\mathrm { n } = 4 , \left| \mathrm {~m} _ { l } \right| = 1$ and $\mathrm { m } _ { \mathrm { s } } = - \frac { 1 } { 2 }$ is $\_\_\_\_$
Q51. In an atom, total number of electrons having quantum numbers $\mathrm { n } = 4 , \left| \mathrm {~m} _ { l } \right| = 1$ and $\mathrm { m } _ { \mathrm { s } } = - \frac { 1 } { 2 }$ is $\_\_\_\_$\\