Question

1. how many valence electrons are in group 2 elements? 1 2 4 8 2) how many valence electrons are in group 17 elements? 2 7 6 17

Explanation:

In the periodic table, the group number for main - group elements (groups 1, 2, 13 - 18) indicates the number of valence electrons for elements in that group. Group 2 elements have 2 valence electrons and group 17 elements have 7 valence electrons.

Answer:

1. B. 2
2. B. 7