How are atomic size and ionization energy related?
As the Atomic size increase so does Ionization Energy.
Atomic size is the distance from the nucleus to the valence shell. Ionization energy is the energy required to remove the most loosely held electron from a gaseous atom or ion. Ionization energy increases across a period and decreases down the family. So as the Atomic size increase so does Ionization Energy. As the Atomic size decrease so does Ionization Energy.