Question

Cesium is the most reactive metal. Then why is it mentioned in middle school textbooks that potassium is the most reactive?

Answer 1

Answer:

The alkali metals, Group 1A, are the most reactive metals because they have one valence or outer electron. ... This makes Francium the most reactive, followed by cesium, rubidium, potassium, sodium and lithium. Francium is almost non-existent in nature so cesium is the most reactive metal of those observed.