Question

elements in the same group
a have the same properties
b have similar properties
c have the non - metals on the right side
d have the same size atoms

Explanation:

Elements in the same group of the periodic table have similar chemical properties because they have the same number of valence electrons. However, they do not have exactly the same properties (e.g., reactivity can vary slightly due to differences in atomic size and other factors). Non - metals are not always on the right side of a group (e.g., group 14 has carbon as a non - metal on the top and lead as a metal at the bottom). Also, atoms in the same group have different sizes as we move down the group (atomic radius increases down a group).

Answer:

B. have similar properties