Analyzing Atomic Radius, Ionic Radius, Ionization Energy and Electronegativity.

Predictions:
Atomic Radius vs. Number of Representative Elements
Going across the periodic table, I would predict that the pattern of the atomic radius will decrease, while going down the period table the atomic radius will increase.
Ionization vs. Number of Representative Elements
Trend-wise, ionization potentials tend to increase while one progresses across a period because the greater number of protons (higher nuclear charge) attract the orbiting electrons more strongly, thereby increasing the energy required to remove one of the electrons.



Question: How do these four properties of the main-group atoms compare within a group and across a period.
As you go down the period table the atomic raius