serious answers only?

Question

what f any, relationshp is there between the atomic radius, first ionization energy, and reactivity for the alkali metals?

Answer 1

The bigger the atom,
the taller the radius,
the taller the distance of the outer electron to the center of the ion,
the weaker the electric bond between the outer electron and the ion,
the lesser the first ionization energy.

Th

Answer 2

The best way to discover this is to look at a periodic table that lists all of these items. You will clearly see the relationship.