Question

study the following modern periodic table and answear the following question4) what is the periodic trend observed in the variation of atomic radius while going from left and right with in a periodic?

5)explain with reason why nonemetallic chracter decreases down a group.

Answer 1

q4)In going left to right in the periods the atomic radius decreases because the nucleus attract the electrons but in group 18 the atomic radius suddenly increases because of the fact that there is an electronic repulsion occur in the outermost shells of that atom.

q5) the atomic radius is decreasing as a result the metallic charatcer decrease down the group.