

MCQOPTIONS
Saved Bookmarks
1. |
The electronic configuration of elements A, B, C and D are (2, 8, (a) (2, 8, (b) and (2, 8, 7) respectively. Which of them can make an ion with two negative charges. |
A. | A |
B. | B |
C. | Baking soda |
D. | D |
Answer» D. D | |