In an atom, the total number of electrons having quantum numbers
`n = 4,|m_(l)| = 1` and `m_(s) =- (1)/(2)` is

Answer

6

Explanation

n=4 ,=0,1,2,3, `m_(l)=+1,-1" , "m_(s)=-(1)/(2)`
l=0, `m_(l)=0`

There will be six electrons with `m_(s)=-(1)/(2)`