Question

what is the most common ion charge for a group 2 element? +1 +2 -1 -2

Explanation:

Group 2 elements have 2 valence electrons. They tend to lose these 2 electrons to achieve a stable electron configuration (similar to noble gases). When an atom loses electrons, it forms a positively - charged ion. Losing 2 electrons gives an ion charge of + 2.

Answer:

+2