MCQ
Which electronic configuration is not observing the ($n + l$) rule
- A$1{s^2},\,2{s^2}2{p^6},\,3{s^2}3{p^6}3{d^1},\,4{s^2}$
- B$1{s^2},\,2{s^2}s{p^6},\,3{s^2}3{p^6}3{d^7},\,4{s^2}$
- ✓$1{s^2},\,2{s^2}2{p^6},\,3{s^2}3{p^6}3{d^5},\,4{s^1}$
- D$1{s^2},\,2{s^2}2{p^6},\,3{s^2}3{p^6}3{d^8},\,4{s^2}$
