Question

Within the main group of elements, what do elements in a family have in common?

same number of energy orbits
same number of protons
same number of valence electrons
same atomic radius

Answer 1

same number of valence electrons

Explanation: this is based on my opinion cause i got it correct on my test.

Answer 2

The correct answer for this question would be the third option. Within the main group of elements, the elements in the family have the same number of valence electrons. In addition, elements in the same period have the same electron shells. Hope this is the answer that you are looking for.