The Periodic Table

Atomic radius, electronegativity, electron affinity and ionization energy all increase from left to right. On the other hand, atomic radius is a property that trends the opposite direction. So fluorine has the smallest atomic radius while Francium has the largest atomic radius. The big key here is that you need to be able to order different elements in terms of their atomic radii,. Their ionization, energy, electr onegativity, and everything.