Question

how many valence electrons do elements in group 2, the alkaline earth metals, have? 2 1 7 6

Explanation:

In the periodic table, the group number (for main - group elements) is related to the number of valence electrons. For Group 2 elements (Alkaline Earth Metals), which are main - group elements, the number of valence electrons is equal to the group number. So elements in Group 2 have 2 valence electrons.

Answer:

A. 2