How many electrons are present in all subshells (fully - filled) with

1.	How many electrons are present in all subshells (fully - filled) with n + l = 5 ?
Answer» SOLUTION :Subshells with `n + l = 5` are 5S, 4p, 3D. Hence, electrons present `= 2 + 6 + 10 = 18`

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