MCQ
The elements $, A, B, C, D$ and $E$ have atomic number $9, 11, 17, 12$ and $13$ respectively. Which pair of elements belong to the same group?
- A$A$ and $B$
- B$B$ and $D$
- ✓$A$ and $C$
- D$D$ and $E$
|
Element
|
Electronic configuration
|
| $A(9)$ | $2, 7$ |
| $B(11)$ | $2, 8, 1$ |
| $C(17)$ | $2, 8, 7$ |
| $D(12)$ | $2, 8, 2$ |
| $E(13)$ | $2, 8, 3$ |
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.