How many electrons will be present in the subshells having `m _(s)` value of `- 1//2` for n = 4 ?

Explanation

For n = 4, the total nuber of electrons are `2n ^(2) , i.e., 2(4) ^(2) = 32.`
But with `m _(s) = - 1//2.` it is just the half, i.e., 16.
So, number of electrons with n = 4 and `m _(s )=- 1//2 is 16.`