10. Periodic Properties of the Elements

As you move across the periodic table atoms tend to get smaller because, ______________.

As you travel down a group atomic radius (decreases/increases). Why

Which of these describes atomic radii as one moves from top to bottom within a group

Which of these describes a tendency for atomic radii as displayed on the periodic chart?

Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si, and Ar?

What trend in atomic radius occurs across the periodic table? what causes this trend?