How many sub-shells are associated with n=4 ? How many electrons will be present in the sub-shell having ms value of -1/2 for n=4 ?

How many sub-shells are associated with n=4 ? How many electrons will

1.	How many sub-shells are associated with n=4 ? How many electrons will be present in the sub-shell having ms value of -1/2 for n=4 ?
Answer» SOLUTION :For `n=4,` Four SUB-sheels NAMELY `4s, 4p, 4d and 4F ` are possible. Total number of electrons present in these sub SHELLS having `m_(s)` value of `-1//2` is 16.