" Elements belonging to the same group have the same valency."

Elements belonging to the same period have

Elements belonging to the same period have-

Mention one similarity in atoms of the elements belonging to the same group of the periodic table.

Why the elements belonging to the same group do have similar chemical properties?

Elements beloging to the same group have similar properties because

Assertion: Elements belonging to the same group show similarity in chemical properties. Reason: Elements of the same group have same number of valence electrons.