Elements in the same column of the periodic table in the Groups labeled A tend to have similar chemical and physical properties because they have the same number of
A)valence electrons.
B)protons.
C)protons plus electrons.
D)protons plus neutrons.

Question

Quizplus · Accepted Answer

Every element has its own unique number of protons and electrons,so it must be the outer electrons that make those in the same group similar.

Elements in the Same Column of the Periodic Table in the Groups