Saved Bookmarks
| 1. |
The elements A, B, C, D, and E have atomic numbers 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group? (a) A and B (b) B and D (c) A and C (d) D and E |
|
Answer» The answer is (c) A and C A and C are fluorine and chlorine belongs to the same group. |
|