Which is the most reactive metal?
Cs = cesium, is the most reactive metal, the reason is same as the first answerer said, (down the group the reactivity increases,) and also due to large size the Cs will eject electron easily, and react. But francium, though being the last in the 1st group, is not the most reactive. “AS IT IS RADIOACTIVE AND THUS NOT A STABLE ONE” STUDIES ARE GOING ON IN SUCH FEILD, BUT TILL NOW THE Cs IS CONSIDERED MOST REACTIVE/.
