Within  a group of elements, as the atomic number increases, the atomic radius does what. (ie: increase, decrease, remains the same)???    

Expert Answers
ndnordic eNotes educator| Certified Educator

As you go down any group in the periodic table, you are adding an additional  energy level containing electrons so the atomic radius increases down the group.

atyourservice | Student

Within  a group of elements, as the atomic number increases, the atomic radius increases because you are adding new valance shells at each level.

senioreeto | Student
the atomic radius decreases down a group becoz as we go from top to bottom in a group,one new valence shell gets added in the atom which increases its radius.