Which is most reactive element francium or cesium?

Francium is a relatively heavy element with atomic number 87. In such heavy elements, the reactivity and other physical properties are impacted. In Francium, the inner s electrons travel at roughly 64% the speed of light. These relativistic speeds... read more

But,for really heavy elements, the electrons begin to get slightly harder to remove than expected . So as francium is very heavy element than cesium the removal of outermost electron will be harder than of cesium. Hence, cesium will be most reactive element in the periodic table. read more