Q. What is the maximum number of electrons having same spin with $n + l = 4$?
UP CPMTUP CPMT 2015Structure of Atom
Solution:
Subshells with $n +l = 4$ are $3p$ and $4s$
Value
of $n$ Value
of $l$ Value of $n+l$ Type of orbitals $3$ $1$ $3+1$ 
$4$ $0$ $4+0$ 
Hence, maximum no. of electrons having same spin will be $4$
| Value of $n$ | Value of $l$ | Value of $n+l$ | Type of orbitals |
|---|---|---|---|
| $3$ | $1$ | $3+1$ | |
| $4$ | $0$ | $4+0$ | |