Question

In the periodic table, where is the set of elements that have exactly 2 valence electrons in their atoms?
-a stair-step line in groups 13 to 16 of the table
-group 18, the noble gases at the far right of the table
-group 2, the second column of the table

Answer 1

The set of elements that have exactly 2 valence electrons in their atoms is found in **group 2, the second column of the periodic table**. These elements are known as alkaline earth metals.