MCQ
The electronic structure of four elements $A, B, C, D$ are
- A$1{s^2}$
- B$1{s^2},\,\,2{s^2}\,2{p^2}$
- ✓$1{s^2},\,\,2{s^2}\,2{p^5}$
- D$1{s^2},\,\,2{s^2}\,2{p^6}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.


