Question

use the drop - down menus to describe the behavior of elements in group 2 and group 7 when forming chemical bonds. when forming chemical bonds, elements in group 7 electron, while elements in group 2 electrons.

Explanation:

Elements in Group 7 (halogens) have 7 valence - electrons and tend to gain 1 electron to achieve a stable octet. Elements in Group 2 (alkaline - earth metals) have 2 valence - electrons and tend to lose 2 electrons to achieve a stable octet.

Answer:

First drop - down: gain 1; Second drop - down: lose 2